Raspberr Pi Pico W で電動ガレージシャッターのリモコンを作成してみた。

Last Updated on 2026-10-18 by researcher

数年前にESP8266で作ったリモコンがたまに不調になったりして寿命が近そうな気がしてきたので Raspberry Pi Pico W で新たに作り直してみた。

今までと同じ仕様で作るには、WiFi/MQTT/MDNS(Query含む)/OTAなどの機能が必要であったが、Arduinoのボードマネジャーとして下記を利用するだけでＯＫであったことと少しだけ修正したライブラリもあったりもしたが開発のしやすさは素晴らしすぎる！！

https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json

詳細は下記を参照のこと。
Arduino-Pico

ESPのWiFiライブラリをPicoWへ移植してるようなので、ESPからPicoWへの移行を考えてる人には超お勧めだ。

なお、我が家でしか使えない物を公開する意味ってあるのかな？とも思ったが自身の忘備録かねて皆様の何かの参考にでもなれば幸いである。

【初期化操作】
３個のボタンを同時に押しながら電源を入れると初期化され、APモード(192.168.4.1)で起動する。
スマホなどから”picow-xxxxxx”にWiFi接続(初期パスワードは接続名と同じ)後、ブラウザで”192.168.4.1″を開くと設定画面が表示される。
接続先APのPASSWORD設定を行なった後[Apply]で保存し[Reboot]で再起動するとSTAモードで起動しWiFi接続が成功するまで繰り返す。

【通常操作】
・ボタン短押し(3秒未満)．．．シャッターを閉じる。
・ボタン長押し(3秒以上)．．．シャッターを開ける。
・割り当てされたIPアドレス或いは”picow-xxxxxx.local”をブラウザで開くと設定画面が表示される。

【接続管理】
WiFi/MQTTへの接続/再接続は自動で行なう。

【LED】
1.0秒毎に点滅．．．APモード
0.2秒毎に点滅．．．WiFi/MQTT未接続
消灯．．．シャッター全閉
点滅．．．シャッター開閉度(100-0%)に応じて消灯/点灯の割合が変化
点灯．．．シャッター全開

【外観】

TW5-3-7B プラスチックケース:W50 x D70 x 27.5(mm)

【中身】

※タカチのプラケースの基板取付の下(4mm)にタクトＳＷがおさまるのはリモコン用途を意識しているのかな？

【基板】

※基板のタクトＳＷの中心穴は、ボタン用の穴あけ位置をドリルなどでマークするのに便利！！

【USB-Cコネクタ】

5個/セット DIY OEM Type C メスソケット – 2ピンヘッダーケーブルピッチ=2.0mm ラッチマウントタイプ DC 5V 電源

※　CC1/2のプルダウンがないのでUSB-A to C変換ケーブル等を利用すること。

【回路図】

【設定画面】黒塗りがスゴ！！(笑)

【別途インストールが必要なArduinoライブラリ】
ArduinoMqttClient

【ライブラリの修正箇所】
[…/libraries/ArduinoMqttClient/src/MqttClient.h]

#define MQTT_CLIENT_STD_FUNCTION_CALLBACK

1	#define MQTT_CLIENT_STD_FUNCTION_CALLBACK

※コメントを外す

[…/Arduino15/packages/rp2040/hardware/rp2040/6.3.0/libraries/ArduinoOTA/ArduinoOTA.cpp]

//#include <SimpleMDNS.h>
#include <LEAmDNS.h>

1 2	//#include <SimpleMDNS.h> #include <LEAmDNS.h>

※インクルードを入れ替える

【ファームウェア】

/*
  ShutterSwitch-PicoW.ino - Shutter Switch Controller for Raspberry Pi Pico W

  Copyright (c) 2026 Sasapea's Lab. All right reserved.

  This program is free software: you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation, either version 3 of
  the License, or at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program. If not, see <https://www.gnu.org/licenses/>.

  Boards Manager: https://arduino-pico.readthedocs.io/
  ----------------------------------------------------
  Flash Size: "2MB (Sketch 1MB, FS: 1MB)
  WiFi Resion: "Japan"
  ----------------------------------------------------
  AP Mode: 192.168.4.1
*/
#include "wlan.h"

#define LED_WIFI_OFFLINE_INTERVAL 200
#define LED_APMODE_INTERVAL       1000
#define LED_PERCENT_INTERVAL      1000
#define BUTTON_LONG_PUSH_TIME     3000
#define SHUTTER_NO_MAX            3

#define elementsof(a) (int)(sizeof(a)/sizeof(*a))

static const uint8_t GPIO_BTNS[] = { 11,  6,  2 };
static const uint8_t GPIO_LEDS[] = { 19, 22, 28 };

static const char CMD_STOP[]       = "STOP";       /* unsupported */
static const char CMD_DOWN_FORCE[] = "DOWN_FORCE"; /* unsupported */
static const char CMD_DOWN[]       = "DOWN";
static const char CMD_UP[]         = "UP";

static const char TOPIC_CONTROL[] = "/home/garage/shutter/control/";
static const char TOPIC_STATE  [] = "/home/garage/shutter/state/";
static const char TOPIC_QUERY  [] = "/home/garage/shutter/query/0";

static WLan     wlan;
static uint8_t  percent[3] = { 100, 100, 100 };
static uint8_t  led_mask;
static uint8_t  led_data;

static int getStartShutterNo(void)
{
  return 1;
}

static String getTopicAll(const char *topic)
{
  String rv = topic;
  rv += '#';
  return rv;
}

static String getTopic(const char *topic, int no)
{
  String rv = topic;
  rv += no;
  return rv;
}

static void command(const char *cmd, int no)
{
  wlan.mqtt_publish(getTopic(TOPIC_CONTROL, no + getStartShutterNo()), cmd, strlen(cmd));
}

static void message(WLan& wlan, const String& topic, const void* payload, size_t size)
{
  (void)wlan;
  if (topic.startsWith(TOPIC_STATE))
  {
    int no = topic.substring(strlen(TOPIC_STATE)).toInt();
    if (no <= SHUTTER_NO_MAX)
    {
      no -= getStartShutterNo();
      if ((no >= 0) && (no < elementsof(percent)))
      {
        uint8_t val = String((const char*)payload, size).toInt();
        percent[no] = val;
      }
    }
  }
}

static void notify(WLan& wlan, WLan::NOTIFY status)
{
  switch (status)
  {
    case WLan::NOTIFY::WIFI_CONNECTED:
      break;
    case WLan::NOTIFY::WIFI_DISCONNECTED:
      break;
    case WLan::NOTIFY::MQTT_CONNECTED:
      wlan.mqtt_message(message);
      wlan.mqtt_subscribe(getTopicAll(TOPIC_STATE));
      wlan.mqtt_publish(TOPIC_QUERY);
      break;
    case WLan::NOTIFY::MQTT_DISCONNECTED:
      break;
  }
}

static void display_led(bool on, int no = -1)
{
  if ((no >= 0) && (no < elementsof(GPIO_LEDS)))
  {
    uint8_t bit = 1 << no;
    if (on)
      led_data |= bit;
    else
      led_data &= ~bit;
    if ((led_mask & bit) == 0)
      digitalWrite(GPIO_LEDS[no], on ? LOW : HIGH);
  }
  else
  {
    for (int i = 0; i < elementsof(GPIO_LEDS); ++i)
      display_led(on, i);
  }
}

static void control_led(bool mask, bool on, int no = -1)
{
  if ((no >= 0) && (no < elementsof(GPIO_LEDS)))
  {
    uint8_t bit = 1 << no;
    if (mask)
      led_mask |= bit;
    else
    {
      led_mask &= ~bit;
      on = led_data & bit;
    }
    digitalWrite(GPIO_LEDS[no], on ? LOW : HIGH);
  }
  else
  {
    for (int i = 0; i < elementsof(GPIO_LEDS); ++i)
      control_led(mask, on, i);
  }
}

static uint8_t button_status(void)
{
  uint8_t rv = 0;
  for (int i = 0; i < elementsof(GPIO_BTNS); ++i)
  {
    if (digitalRead(GPIO_BTNS[i]) == LOW)
      rv |= 1 << i;
  }
  return rv;
}

static void control(void)
{
  static struct
  {
    uint32_t pushed;
    uint8_t  status;
  } btns[elementsof(GPIO_BTNS)];

  for (int i = 0; i < elementsof(btns); ++i)
  {
    if (digitalRead(GPIO_BTNS[i]) == LOW)
    {
      switch (btns[i].status)
      {
        case 0:
          btns[i].pushed = millis();
          btns[i].status = 1;
          control_led(true, false, i);
          break;
        case 1:
          if (millis() - btns[i].pushed >= BUTTON_LONG_PUSH_TIME)
          {
            command(CMD_UP, i);
            control_led(true, true, i);
            delay(100);
            control_led(false, false, i);
            btns[i].status = 2;
          }
          break;
      }
    }
    else
    {
      if ((btns[i].status == 1) && (millis() - btns[i].pushed >= 20))
      {
        command(CMD_DOWN, i);
        control_led(true, true, i);
        delay(100);
      }
      control_led(false, false, i);
      btns[i].status = 0;
    }
  }
}

void setup()
{
  /* Setup GPIO */
  for (int i = 0; i < elementsof(GPIO_BTNS); ++i)
    pinMode(GPIO_BTNS[i], INPUT_PULLUP);
  for (int i = 0; i < elementsof(GPIO_LEDS); ++i)
    pinMode(GPIO_LEDS[i], OUTPUT_12MA);
  /* Setup wlan */
  wlan.notify(notify);
  wlan.begin(button_status() == 7);
  /* Setup Serial (USB) */
  Serial.begin(115200);
  while (!Serial && (millis() < 1000))
    delay(10);
}

void loop()
{
  if (wlan.run())
  {
    /* WiFi+MQTT Connected */
    control();
    uint32_t t = millis() % LED_PERCENT_INTERVAL;
    for (int i = 0; i < elementsof(GPIO_LEDS); ++i)
      display_led(t >= (uint32_t)percent[i] * LED_PERCENT_INTERVAL / 100, i);
  }
  else
  {
    /* WiFi+MQTT Disonnected or AP Mode */
    display_led((millis() / (wlan.apmode() ? LED_APMODE_INTERVAL : LED_WIFI_OFFLINE_INTERVAL)) & 1);
  }
}

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ShutterSwitch-PicoW.ino - Shutter Switch Controller for Raspberry Pi Pico W

This program is free software: you can redistribute it and/or

modify it under the terms of the GNU General Public License as

published by the Free Software Foundation, either version 3 of

the License, or at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <https://www.gnu.org/licenses/>.

Boards Manager: https://arduino-pico.readthedocs.io/

----------------------------------------------------

Flash Size: "2MB (Sketch 1MB, FS: 1MB)

WiFi Resion: "Japan"

----------------------------------------------------

AP Mode: 192.168.4.1

#include "wlan.h"

#define LED_WIFI_OFFLINE_INTERVAL 200

#define LED_APMODE_INTERVAL 1000

#define LED_PERCENT_INTERVAL 1000

#define BUTTON_LONG_PUSH_TIME 3000

#define SHUTTER_NO_MAX 3

#define elementsof(a) (int)(sizeof(a)/sizeof(*a))

static const uint8_t GPIO_BTNS[] = { 11, 6, 2 };

static const uint8_t GPIO_LEDS[] = { 19, 22, 28 };

static const char CMD_STOP[] = "STOP"; /* unsupported */

static const char CMD_DOWN_FORCE[] = "DOWN_FORCE"; /* unsupported */

static const char CMD_DOWN[] = "DOWN";

static const char CMD_UP[] = "UP";

static const char TOPIC_CONTROL[] = "/home/garage/shutter/control/";

static const char TOPIC_STATE [] = "/home/garage/shutter/state/";

static const char TOPIC_QUERY [] = "/home/garage/shutter/query/0";

static WLan wlan;

static uint8_t percent[3] = { 100, 100, 100 };

static uint8_t led_mask;

static uint8_t led_data;

static int getStartShutterNo(void)

{

return 1;

}

static String getTopicAll(const char *topic)

{

String rv = topic;

rv += '#';

return rv;

}

static String getTopic(const char *topic, int no)

{

String rv = topic;

rv += no;

return rv;

}

static void command(const char *cmd, int no)

{

wlan.mqtt_publish(getTopic(TOPIC_CONTROL, no + getStartShutterNo()), cmd, strlen(cmd));

}

static void message(WLan& wlan, const String& topic, const void* payload, size_t size)

{

(void)wlan;

if (topic.startsWith(TOPIC_STATE))

{

int no = topic.substring(strlen(TOPIC_STATE)).toInt();

if (no <= SHUTTER_NO_MAX)

{

no -= getStartShutterNo();

if ((no >= 0) && (no < elementsof(percent)))

{

uint8_t val = String((const char*)payload, size).toInt();

percent[no] = val;

}

static void notify(WLan& wlan, WLan::NOTIFY status)

{

switch (status)

{

case WLan::NOTIFY::WIFI_CONNECTED:

break;

case WLan::NOTIFY::WIFI_DISCONNECTED:

break;

case WLan::NOTIFY::MQTT_CONNECTED:

wlan.mqtt_message(message);

wlan.mqtt_subscribe(getTopicAll(TOPIC_STATE));

wlan.mqtt_publish(TOPIC_QUERY);

break;

case WLan::NOTIFY::MQTT_DISCONNECTED:

break;

}

static void display_led(bool on, int no = -1)

{

if ((no >= 0) && (no < elementsof(GPIO_LEDS)))

{

uint8_t bit = 1 << no;

if (on)

led_data |= bit;

else

led_data &= ~bit;

if ((led_mask & bit) == 0)

digitalWrite(GPIO_LEDS[no], on ? LOW : HIGH);

}

else

{

for (int i = 0; i < elementsof(GPIO_LEDS); ++i)

display_led(on, i);

}

static void control_led(bool mask, bool on, int no = -1)

{

if ((no >= 0) && (no < elementsof(GPIO_LEDS)))

{

uint8_t bit = 1 << no;

if (mask)

led_mask |= bit;

else

{

led_mask &= ~bit;

on = led_data & bit;

}

digitalWrite(GPIO_LEDS[no], on ? LOW : HIGH);

}

else

{

for (int i = 0; i < elementsof(GPIO_LEDS); ++i)

control_led(mask, on, i);

}

static uint8_t button_status(void)

{

uint8_t rv = 0;

for (int i = 0; i < elementsof(GPIO_BTNS); ++i)

{

if (digitalRead(GPIO_BTNS[i]) == LOW)

rv |= 1 << i;

}

return rv;

}

static void control(void)

{

static struct

{

uint32_t pushed;

uint8_t status;

} btns[elementsof(GPIO_BTNS)];

for (int i = 0; i < elementsof(btns); ++i)

{

if (digitalRead(GPIO_BTNS[i]) == LOW)

{

switch (btns[i].status)

{

case 0:

btns[i].pushed = millis();

btns[i].status = 1;

control_led(true, false, i);

break;

case 1:

if (millis() - btns[i].pushed >= BUTTON_LONG_PUSH_TIME)

{

command(CMD_UP, i);

control_led(true, true, i);

delay(100);

control_led(false, false, i);

btns[i].status = 2;

}

break;

}

else

{

if ((btns[i].status == 1) && (millis() - btns[i].pushed >= 20))

{

command(CMD_DOWN, i);

control_led(true, true, i);

delay(100);

}

control_led(false, false, i);

btns[i].status = 0;

}

void setup()

{

/* Setup GPIO */

for (int i = 0; i < elementsof(GPIO_BTNS); ++i)

pinMode(GPIO_BTNS[i], INPUT_PULLUP);

for (int i = 0; i < elementsof(GPIO_LEDS); ++i)

pinMode(GPIO_LEDS[i], OUTPUT_12MA);

/* Setup wlan */

wlan.notify(notify);

wlan.begin(button_status() == 7);

/* Setup Serial (USB) */

Serial.begin(115200);

while (!Serial && (millis() < 1000))

delay(10);

}

void loop()

{

if (wlan.run())

{

/* WiFi+MQTT Connected */

control();

uint32_t t = millis() % LED_PERCENT_INTERVAL;

for (int i = 0; i < elementsof(GPIO_LEDS); ++i)

display_led(t >= (uint32_t)percent[i] * LED_PERCENT_INTERVAL / 100, i);

}

else

{

/* WiFi+MQTT Disonnected or AP Mode */

display_led((millis() / (wlan.apmode() ? LED_APMODE_INTERVAL : LED_WIFI_OFFLINE_INTERVAL)) & 1);

}

/*
  wlan.h - WiFi Management Library for Raspberry Pi Pico W

  Copyright (c) 2026 Sasapea's Lab. All right reserved.

  This program is free software: you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation, either version 3 of
  the License, or at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program. If not, see <https://www.gnu.org/licenses/>.

  Boards Manager: https://arduino-pico.readthedocs.io/
  ----------------------------------------------------
  Flash Size: "2MB (Sketch 1MB, FS: 1MB)
  WiFi Resion: "Japan"
  ----------------------------------------------------
*/
#pragma once

#include <algorithm>
#include <vector>
#include <map>
#include <functional>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <Arduino.h>
#include <EEPROM.h>
#include <LEAmDNS.h>
#include <ArduinoOTA.h>        /* ArduinoOTA.cpp: #include <SimpleMDNS.h> --> <LEAmDNS.h> */
#include <ArduinoMqttClient.h> /* MqttClient.h: #define MQTT_CLIENT_STD_FUNCTION_CALLBACK */
#include "wsta.h"

class WLan : public WSta
{
  public:

    typedef enum struct NOTIFY
    {
      WIFI_CONNECTED,
      WIFI_DISCONNECTED,
      MQTT_CONNECTED,
      MQTT_DISCONNECTED,
    };

    typedef std::function<void(WLan& wlan, NOTIFY status)> notify_t;
    typedef std::function<void(WLan& wlan, const String& topic, const void* payload, size_t size)> mqtt_message_t;

    WLan(bool led = true) : WSta(led)
    {
      _mqtt_client = new MqttClient(_wifiClient);
      _mqtt_broker.connected = false;
      memset(&_uptime, 0, sizeof(_uptime));
    }

    virtual ~WLan(void)
    {
      end();
      delete _mqtt_client;
      WSta::~WSta();
    }

    void begin(bool init = false)
    {
      EEPROM.begin(4096);
      EEPROM.get<decltype(_conf)>(0, _conf);
      if (init || (_conf.mark !=  CONF_CHECK_MARK))
      {
        memset(&_conf, 0, sizeof(_conf));
        _conf.mark = CONF_CHECK_MARK;
        _conf.dhcp = true;
        strncpy(_conf.sys_password, udn(), sizeof(_conf.sys_password));
        EEPROM.put<decltype(_conf)>(0, _conf);
        EEPROM.commit();
      }
      if (!IPAddress(_conf.subnet).isSet())
        memcpy(_conf.subnet, &IPAddress(255, 255, 255, 0)[0], sizeof(_conf.subnet));
      if (_conf.mqtt_port == 0)
        _conf.mqtt_port = 1883;
      /* Check AP Mode */
      if ((_ap_mode = !*_conf.ssid))
        beginAP();
    }

    void end(void)
    {
      if (_ap_mode)
        endAP();
      else
        disconnected();
    }

    bool apmode(void)
    {
      return _ap_mode;
    }

    void notify(notify_t callback)
    {
      _notify = callback;
    }

    void mqtt_auth(const String& username, const String& password)
    {
      _mqtt_client->setUsernamePassword(username, password);
    }

    void mqtt_keepalive_interval(uint32_t interval)
    {
      _mqtt_client->setKeepAliveInterval(interval);
    }

    void mqtt_connection_timeout(uint32_t timeout)
    {
      _mqtt_client->setConnectionTimeout(timeout);
    }

    void mqtt_tx_payload_size(uint16_t size)
    {
      _mqtt_client->setTxPayloadSize(size);
    }

    void mqtt_clean_session(bool clean)
    {
      _mqtt_client->setCleanSession(clean);
    }

    void mqtt_will_message(const String& topic, const void* payload = nullptr, size_t size = 0, bool retain = false, uint8_t qos = 0)
    {
      _mqtt_client->beginWill(topic, size, retain, qos);
      if (payload && size)
        _mqtt_client->write((uint8_t*)payload, size);
      _mqtt_client->endWill();
    }

    void mqtt_publish(const String& topic, const void* payload = nullptr, size_t size = 0, bool retain = false, uint8_t qos = 0, bool dup = false)
    {
      _mqtt_client->beginMessage(topic, size, retain, qos, dup);
      if (payload && size)
        _mqtt_client->write((uint8_t*)payload, size);
      _mqtt_client->endMessage();
    }

    void mqtt_subscribe(const String& topic, uint8_t qos = 0)
    {
      _mqtt_client->subscribe(topic, qos);
    }

    void mqtt_message(mqtt_message_t callback)
    {
      _mqtt_client->onMessage
      (
        [this, callback] (MqttClient* client, int messageSize)
        {
          String topic = client->messageTopic();
          if (callback)
          {
            char payload[messageSize];
            client->read((uint8_t*)payload, messageSize);
            callback(*this, topic, payload, messageSize);
          }
        }
      );
    }

    bool run(void)
    {
      uptime();
      if (_ap_mode)
      {
        http_server();
        connect_led(true);
      }
      else if (WSta::run())
      {
        http_server();
        mqtt_client();
        ArduinoOTA.handle();
        return !*_conf.mqtt_host || _mqtt_client->connected();
      }
      return false;
    }

    uint64_t uptime(void)
    {
      uint32_t t = millis();
      _uptime.msec += t - _uptime.save;
      _uptime.save = t;
      return _uptime.msec;
    }

    const char* udn(void)
    {
      if (*_udn == 0)
      {
        /* Creating Unique Device Name */
        uint8_t mac[WL_MAC_ADDR_LENGTH];
        WiFi.macAddress(mac);
#if defined(ARDUINO_RASPBERRY_PI_PICO_2W)
        snprintf(_udn, sizeof(_udn), "pico2w-%02x%02x%02x",  mac[WL_MAC_ADDR_LENGTH - 3],  mac[WL_MAC_ADDR_LENGTH - 2],  mac[WL_MAC_ADDR_LENGTH - 1]);
#else
        snprintf(_udn, sizeof(_udn), "picow-%02x%02x%02x",  mac[WL_MAC_ADDR_LENGTH - 3],  mac[WL_MAC_ADDR_LENGTH - 2],  mac[WL_MAC_ADDR_LENGTH - 1]);
#endif
      }
      return _udn;
    }

  protected:

    virtual void wifi_connected(void)
    {
      if (_notify)
        _notify(*this, NOTIFY::WIFI_CONNECTED);
    }

    virtual void wifi_disconnected(void)
    {
      if (_notify)
        _notify(*this, NOTIFY::WIFI_DISCONNECTED);
    }

    virtual void mqtt_connected(void)
    {
      if (_notify)
        _notify(*this, NOTIFY::MQTT_CONNECTED);
    }

    virtual void mqtt_disconnected(void)
    {
      if (_notify)
        _notify(*this, NOTIFY::MQTT_DISCONNECTED);
    }

  private:

    static constexpr const uint32_t CONF_CHECK_MARK  = 0xCAFEBABE;
    static constexpr const uint16_t HTTP_SERVER_PORT = 80;

    static constexpr const char* HTTP_GET       = "GET";
    static constexpr const char* HTTP_POST      = "POST";
    static constexpr const char* CONTENT_TYPE   = "Content-Type:";
    static constexpr const char* CONTENT_LENGTH = "Content-Length:";
    static constexpr const char* URLENCODED     = "application/x-www-form-urlencoded";
    static constexpr const char* URL_SETTING    = "/";
    static constexpr const char* STA_SSID       = "ssid";
    static constexpr const char* STA_PSWD       = "pswd";
    static constexpr const char* STA_DHCP       = "dhcp";
    static constexpr const char* STA_LOCAL_IP   = "local_ip";
    static constexpr const char* STA_SUBNET     = "subnet";
    static constexpr const char* STA_GATEWAY    = "gateway";
    static constexpr const char* STA_DNS_SERVER = "dns_server";
    static constexpr const char* AP_LOCAL_IP    = "ap_local_ip";
    static constexpr const char* AP_SUBNET      = "ap_subnet";
    static constexpr const char* MQTT_HOST      = "mqtt_host";
    static constexpr const char* MQTT_PORT      = "mqtt_port";
    static constexpr const char* SNTP_SERVER    = "sntp_server";
    static constexpr const char* SNTP_TZNAME    = "sntp_tzname";
    static constexpr const char* SYS_PASSWORD   = "sys_password";
    static constexpr const char* SUBMIT         = "submit";
    static constexpr const char* SUBMIT_RESCAN  = "rescan";
    static constexpr const char* SUBMIT_APPLY   = "apply";
    static constexpr const char* SUBMIT_REBOOT  = "reboot";

    typedef struct
    {
      uint32_t mark;
      char     ssid[32];
      char     pswd[64];
      bool     dhcp;
      uint8_t  local_ip  [4];
      uint8_t  subnet    [4];
      uint8_t  gateway   [4];
      uint8_t  dns_server[4];
      char     mqtt_host[32];
      uint16_t mqtt_port;
      char     sntp_server[32];
      char     sntp_tzname[32];
      char     sys_password[32];
     } net_conf_t;

    typedef struct
    {
      String    name;
      IPAddress addr;
      uint16_t  port;
      bool      connected;
    } mqtt_broker_t;

    typedef struct
    {
      uint32_t save;
      uint64_t msec;
    } uptime_t;

    WiFiServer _http_server;
    WiFiClient _wifiClient;
    MqttClient *_mqtt_client;

    bool           _ap_mode;
    net_conf_t     _conf;
    char           _udn[16];
    uptime_t       _uptime;
    mqtt_broker_t  _mqtt_broker;
    notify_t       _notify;

    void beginAP(void)
    {
      WiFi.beginAP(udn(), _conf.sys_password);
      _http_server.begin(HTTP_SERVER_PORT);
    }

    void endAP(void)
    {
      _http_server.stop();
      WiFi.disconnectAP();
    }

    void connect(void) override
    {
      if (*_conf.ssid)
      {
        WiFi.disconnect();
        if (_conf.dhcp)
          WiFi.config(IPAddress(), IPAddress(), IPAddress(), IPAddress());
        else
          WiFi.config(IPAddress(_conf.local_ip), IPAddress(_conf.dns_server),
            IPAddress(_conf.gateway), IPAddress(_conf.subnet));
        WiFi.beginNoBlock(_conf.ssid, _conf.pswd);
      }
    }

    void connected(uint32_t conn_time) override
    {
      (void)conn_time;
      if (*_conf.sntp_server)
      {
        NTP.begin(_conf.sntp_server);
        if (*_conf.sntp_tzname)
        {
          setenv("TZ", _conf.sntp_tzname, 1);
          tzset();
        }
      }
      _http_server.begin(HTTP_SERVER_PORT);
      _mqtt_client->setId(udn());
      ArduinoOTA.setHostname(udn());
      ArduinoOTA.setPassword(_conf.sys_password);
      ArduinoOTA.begin();
      wifi_connected();
    }

    void disconnected(void) override
    {
      wifi_disconnected();
      if (_mqtt_broker.connected)
        mqtt_disconnected();
      _mqtt_broker.connected = false;
      ArduinoOTA.end();
      _mqtt_client->stop();
      _http_server.stop();
      sntp_stop();
    }

    bool query_mqtt_Broker(void)
    {
      _mqtt_broker.addr.clear();
      if (*_conf.mqtt_host)
      {
        _mqtt_broker.addr.fromString(_conf.mqtt_host);
        if (_mqtt_broker.addr.isSet())
        {
          /* Fixed IP Address */
          _mqtt_broker.name = _mqtt_broker.addr.toString();
          _mqtt_broker.port = _conf.mqtt_port;
        }
        else
        {
          // MDNS Query Service (MQTT)
          int index = MDNS.queryService("mqtt", "tcp");
          if (index)
          {
            if ((strcmp(_conf.mqtt_host, "*") == 0) || (strcmp(_conf.mqtt_host, "*.local") == 0))
              index = 0;
            else
            {
              /* Fixed Host Name */
              while (--index >= 0)
              {
                if (strcasecmp(MDNS.answerHostname(index), _conf.mqtt_host) == 0)
                  break;
              }
            }
            if (index >= 0)
            {
              _mqtt_broker.name = MDNS.answerHostname(index);
              _mqtt_broker.addr = MDNS.answerIP(index);
              _mqtt_broker.port = MDNS.answerPort(index);
            }
          }
          MDNS.removeQuery();
        }
      }
      return _mqtt_broker.addr.isSet();
    }

    void mqtt_client(void)
    {
      if (_mqtt_client->connected())
        _mqtt_client->poll();
      else if (_mqtt_broker.connected)
      {
        _mqtt_broker.connected = false;
        mqtt_disconnected();
        _mqtt_client->stop();
      }
      else if (query_mqtt_Broker())
      {
        if (_mqtt_client->connect(_mqtt_broker.addr, _mqtt_broker.port))
        {
          _mqtt_broker.connected = true;
          mqtt_connected();
        }
      }
    }

    static void strncpy(char* dst, const char* src, size_t len)
    {
      if (len)
      {
        ::strncpy(dst, src, len);
        dst[len - 1] = 0;
      }
    }

    static void appendf(String& str, const char* format, ...)
    {
      va_list ap;
      va_start(ap, format);
      while (1)
      {
        const char* p = strchr(format, '%');
        if (p)
        {
          str += String(format, (size_t)p - (size_t)format);
          switch (p[1])
          {
            case '%': str += '%'; break;
            case 'd': str += va_arg(ap, int); break;
            case 'u': str += va_arg(ap, unsigned int); break;
            case 's': str += va_arg(ap, const char*); break;
            case '\0': --p; /* fall through */
            default :
              str += "<%";
              if (p[2]) str += p[2];
              str += '>';
              break;
          }
          format = &p[2];
        }
        else
        {
          str += format;
          break;
        }
      }
      va_end(ap);
    }

    static String urlencoded(const String& str)
    {
      String rv = str;
      int pos;
      rv.replace('+', ' ');
      while ((pos = rv.indexOf('%')) >= 0)
      {
        char h = rv[pos + 1];
        char l = rv[pos + 2];
        h = (h >= 'a' ? h - 'a' + 10 : (h >= 'A' ? h - 'A' + 10 : h - '0'));
        l = (l >= 'a' ? l - 'a' + 10 : (l >= 'A' ? l - 'A' + 10 : l - '0'));
        char c = (h << 4) + l;
        rv = rv.substring(0, pos) + c + rv.substring(pos + 3);
      }
      return rv;
    }

    void http_server(void)
    {
      WiFiClient client = _http_server.accept();
      if (!client)
        return;

      // Wait for the client to send data
      for (uint32_t t = millis(); !client.available(); delay(1))
      {
        if (!client.connected() || (millis() - t >= 1000))
        {
          client.stop();
          return;
        }
      }

      // Read HTTP Header
      String method, url, http, type, str;
      std::map<String, String> params;
      int length = -1;
      char buf[256];
      do
      {
        str = client.readStringUntil('\r');
        client.read(); /* skip '\n' */
        if (method.length() == 0)
        {
          int pos = str.indexOf(' ');
          if (pos > 0)
          {
            method = str.substring(0, pos);
            method.trim();
            url = str.substring(pos + 1);
            url.trim();
            pos = url.indexOf(' ');
            if (pos > 0)
            {
              http = str.substring(pos + 1);
              http.trim();
              url = url.substring(0, pos);
            }
          }
          else
            method = "UNKNOWN";
        }
        else if (str.startsWith(CONTENT_TYPE))
        {
          type = str.substring(strlen(CONTENT_TYPE));
          type.trim();
        }
        else if (str.startsWith(CONTENT_LENGTH))
          length = str.substring(strlen(CONTENT_LENGTH)).toInt();
      }
      while (str.length());

      /* Parse URL Parameters */
      int pos = url.indexOf('?');
      if (pos > 0)
      {
        str = url.substring(pos + 1);
        url = url.substring(0, pos);
        while (str.length())
        {
          pos = str.indexOf('&');
          String key, val;
          if (pos >= 0)
          {
            key = str.substring(0, pos);
            str = str.substring(pos + 1);
          }
          else
          {
            key = str;
            str = "";
          }
          pos = key.indexOf('=');
          if (pos >= 0)
          {
            val = urlencoded(key.substring(pos + 1));
            key = urlencoded(key.substring(0, pos));
            params[key] = val;
          }
        }
      }

      /* Parse POST Parameters */
      if (method.equals(HTTP_POST) && type.equals(URLENCODED) && (length > 0))
      {
        int l, m, r;
        l = 0;
        while (length > 0)
        {
          int n = client.read(buf + l, min(length, (int)sizeof(buf) - l));
          if (n <= 0)
            break;
          length -= n;
          n += l;
          l = r = 0;
          m = -1;
          while (r < n)
          {
            char c = buf[r++];
            if (c == '=')
              m = r;
            if ((c == '&') || ((r == n) && (length == 0)))
            {
              if (m >= 0)
              {
                String key = urlencoded(String(buf + l, m - l - 1));
                String val = urlencoded(String(buf + m, r - m - (c == '&')));
                params[key] = val;
              }
              l = r;
              m = -1;
            }
          }
          n -= l;
          memcpy(buf, buf + l, n);
          l = n;
        }
      }

      /* Setting Form Parameters */
      if (url.equals(URL_SETTING))
      {
        String submit = params[SUBMIT];
        if (submit.equals(SUBMIT_REBOOT))
          rp2040.reboot();
        else if (submit.equals(SUBMIT_APPLY))
        {
          /* Data Save to EEPROM */
          for (int i = 0;; ++i)
          {
            String ssid = STA_SSID;
            String pswd = STA_PSWD;
            ssid += i;
            pswd += i;
            if (!params.contains(ssid))
              break;
            ssid = params[ssid];
            pswd = params[pswd];
            if (pswd.length())
            {
              strncpy(_conf.ssid, ssid.c_str(), sizeof(_conf.ssid));
              strncpy(_conf.pswd, pswd.c_str(), sizeof(_conf.pswd));
              break;
            }
          }
          IPAddress local_ip, subnet, gateway, dns_server;
          local_ip.fromString(params[STA_LOCAL_IP]);
          subnet.fromString(params[STA_SUBNET]);
          gateway.fromString(params[STA_GATEWAY]);
          dns_server.fromString(params[STA_DNS_SERVER]);
          _conf.dhcp = params[STA_DHCP].toInt();
          memcpy(_conf.local_ip, &local_ip[0], sizeof(_conf.local_ip));
          memcpy(_conf.subnet, &subnet[0], sizeof(_conf.subnet));
          memcpy(_conf.gateway, &gateway[0], sizeof(_conf.gateway));
          memcpy(_conf.dns_server, &dns_server[0], sizeof(_conf.dns_server));
          strncpy(_conf.mqtt_host, params[MQTT_HOST].c_str(), sizeof(_conf.mqtt_host));
          _conf.mqtt_port = params[MQTT_PORT].toInt();
          strncpy(_conf.sntp_server, params[SNTP_SERVER].c_str(), sizeof(_conf.sntp_server));
          strncpy(_conf.sntp_tzname, params[SNTP_TZNAME].c_str(), sizeof(_conf.sntp_tzname));
          if (params[SYS_PASSWORD].length())
            strncpy(_conf.sys_password, params[SYS_PASSWORD].c_str(), sizeof(_conf.sys_password));
          EEPROM.put<decltype(_conf)>(0, _conf);
          EEPROM.commit();
        }
      } 

      // Build a simple HTML response
      String html = "<!DOCTYPE html><html><body>";
      html += "<h1>";
      html += udn();
      html += " &mdash; WiFi Setting</h1>";
      appendf(html, "<form action='%s' method='post'>", URL_SETTING);

      /* Scan Network */
      struct ap_t
      {
        String ssid;
        int    rssi;
      };
      std::vector<struct ap_t> scan;
      int count = WiFi.scanNetworks();
      for (int i = 0; i < count; ++i)
      {
        const char* ssid = WiFi.SSID(i);
        int rssi = WiFi.RSSI(i);
        if (*ssid)
        {
          bool found = false;
          for (auto& ap : scan)
          {
            if (ap.ssid.equals(ssid))
            {
              if (ap.rssi < rssi)
                ap.rssi = rssi;
              found = true;
              break;
            }
          }
          if (!found)
            scan.push_back({ ssid, rssi });
        }
      }
      std::sort(scan.begin(), scan.end(), [](ap_t& a, ap_t& b) { return a.rssi > b.rssi; });

      /* Access Point */
      html += "<h3>Access Point</h3>";
      html += "<table border='1' cellpadding='6'>";
      html += "<tr><th>SSID</th><th>PASSWORD</th><th>RSSI</th></tr>";
      int index = 0;
      for (auto& ap : scan)
      {
        appendf(html,
          "<tr>"
          "<td><input type='text' name='%s%d' value='%s' readonly>%s</td>"
          "<td><input type='text' name='%s%d' value=''></td>"
          "<td>%d</td>"
          "</tr>",
          STA_SSID, index, ap.ssid.c_str(), ap.ssid.equals(_conf.ssid) ? "<" : "",
          STA_PSWD, index, ap.rssi);
        ++index;
      }
      appendf(html,
        "<tr>"
        "<td><input type='text' name='%s%d' value=''></td>"
        "<td><input type='text' name='%s%d' value=''></td>"
        "<td></td>"
        "</tr>",
        STA_SSID, index, STA_PSWD, index);
      html += "</table>";

      /* IP Config */
      html += "<p><h3>IP Config</h3>";
      html += "<table border='1' cellpadding='6'>";
      appendf(html,
        "<tr>"
        "<td>DHCP</td>"
        "<td><select name='%s'><option value='0'%s>Disabled</option><option value='1'%s>Enabled</option></select></td>"
        "<td align='center'>%s</td>"
        "</tr>",
        STA_DHCP, !_conf.dhcp ? " selected" : "", _conf.dhcp ? " selected" : "", _ap_mode ? "AP Mode" : "STA Mode");
      appendf(html,
        "<tr>"
        "<td>Local IP</td>"
        "<td><input type='text' name='%s' value='%s'></td>"
        "<td>%s</td>"
        "</tr>",
        STA_LOCAL_IP, IPAddress(_conf.local_ip).toString().c_str(), _ap_mode ? WiFi.softAPIP().toString().c_str() : WiFi.localIP().toString().c_str());
      appendf(html,
        "<tr>"
        "<td>Subnet</td>"
        "<td><input type='text' name='%s' value='%s'></td>"
        "<td>%s</td>"
        "</tr>",
        STA_SUBNET, IPAddress(_conf.subnet).toString().c_str(), _ap_mode ? "255.255.255.0" : WiFi.subnetMask().toString().c_str());
      appendf(html,
        "<tr>"
        "<td>Gateway</td>"
        "<td><input type='text' name='%s' value='%s''></td>"
        "<td>%s</td>"
        "</tr>",
        STA_GATEWAY, IPAddress(_conf.gateway).toString().c_str(), _ap_mode ? WiFi.softAPIP().toString().c_str() : WiFi.gatewayIP().toString().c_str());
      appendf(html,
        "<tr>"
        "<td>DNS Server</td>"
        "<td><input type='text' name='%s' value='%s'></td>"
        "<td>%s</td>"
        "</tr>",
        STA_DNS_SERVER, IPAddress(_conf.dns_server).toString().c_str(), _ap_mode ? WiFi.softAPIP().toString().c_str() : WiFi.dnsIP().toString().c_str());
      appendf(html,
        "<tr>"
        "<td>MAC Address</td>"
        "<td></td>"
        "<td>%s</td>"
        "</tr>",
        _ap_mode ? WiFi.softAPmacAddress().c_str() : WiFi.macAddress().c_str());
      html += "</table>";

      /* MQTT Broker */
      html += "<p><h3>MQTT Broker</h3>";
      html += "<table border='1' cellpadding='6'>";
      str = "";
      if ((!_mqtt_broker.name.equals(_mqtt_broker.addr.toString())) && (!_mqtt_broker.name.equals(_conf.mqtt_host)))
        str = " (" + _mqtt_broker.name + ")";
      appendf(html,
        "<tr>"
        "<td>Host</td>"
        "<td><input type='text' name='%s' value='%s'></td>"
        "<td>%s%s</td>"
        "</tr>",
        MQTT_HOST, _conf.mqtt_host, _mqtt_broker.addr.toString().c_str(), str.c_str());
      appendf(html,
        "<tr>"
        "<td>Port</td>"
        "<td><input type='text' name='%s' value='%u'></td>"
        "<td>%u</td>"
        "</tr>",
        MQTT_PORT, _conf.mqtt_port, _mqtt_broker.port);
      html += "</table>";

      /* SNTP Server */
      html += "<p><h3>SNTP Server</h3>";
      html += "<table border='1' cellpadding='6'>";
      str = "";
      if (*_conf.sntp_server)
      {
        time_t t = time(NULL);
        struct tm lt = *localtime(&t);
        snprintf(buf, sizeof(buf), "%04d-%02d-%02d %02d:%02d:%02d",
          lt.tm_year + 1900, lt.tm_mon + 1, lt.tm_mday, lt.tm_hour, lt.tm_min, lt.tm_sec);
        str += buf;
      }
      appendf(html,
        "<tr>"
        "<td>Host</td>"
        "<td><input type='text' name='%s' value='%s'></td>"
        "<td>%s</td>"
        "</tr>",
        SNTP_SERVER, _conf.sntp_server, str.c_str());
      appendf(html,
        "<tr>"
        "<td>TZ Name</td>"
        "<td><input type='text' name='%s' value='%s'></td>"
        "<td>Proleptic Format</td>"
        "</tr>",
        SNTP_TZNAME, _conf.sntp_tzname);
      html += "</table>";

      /* System */
      html += "<p><h3>System</h3>";
      html += "<table border='1' cellpadding='6'>";
      appendf(html,
        "<tr>"
        "<td>CPU Frequency</td>"
        "<td>%u MHz</td>"
        "</tr>",
        (unsigned int)(rp2040.f_cpu() / 1000000));
      switch (rp2040.getResetReason())
      {
        case RP2040::PWRON_RESET:    str = "Power on" ; break;
        case RP2040::RUN_PIN_RESET:  str = "GPIO Pin" ; break;
        case RP2040::SOFT_RESET:     str = "Software" ; break;
        case RP2040::WDT_RESET:      str = "Watch dog"; break;
        case RP2040::DEBUG_RESET:    str = "Debug"    ; break;
        case RP2040::GLITCH_RESET:   str = "Glitch"   ; break;
        case RP2040::BROWNOUT_RESET: str = "Brownout" ; break;
        default:                     str = "Unknown"  ; break;
      }
      appendf(html,
        "<tr>"
        "<td>Reset Reason</td>"
        "<td>%s</td>"
        "</tr>",
        str.c_str());
      str = "";
      str += rp2040.getFreeHeap();
      for (int len = str.length(); len > 3; len -= 3)
        str = str.substring(0, len - 3) + ',' + str.substring(len - 3);
      appendf(html,
        "<tr>"
        "<td>Free Heap Memory</td>"
        "<td>%s Bytes</td>"
        "</tr>",
        str.c_str());
      unsigned long t = uptime() / 1000;
      snprintf(buf, sizeof(buf), "%lu days, %02lu:%02lu:%02lu",
        t / (24 * 60 * 60),
        t / (60 * 60) % 24,
        t / ( 1 * 60) % 60,
        t % 60);
      appendf(html,
        "<tr>"
        "<td>Uptime</td>"
        "<td>%s</td>"
        "</tr>",
        buf);
      appendf(html,
        "<tr>"
        "<td>AP/OTA Password</td>"
        "<td><input type='text' name='%s' value=''></td>"
        "</tr>",
        SYS_PASSWORD);
      html += "</table>";

      /* Submit Button's */
      html += "<p><span style='margin-right: 1em;'></span>";
      appendf(html, "<button type='submit' name='%s' value='%s'>Rescan</button>", SUBMIT, SUBMIT_RESCAN);
      html += "<span style='margin-right: 1em;'></span>";
      appendf(html, "<button type='submit' name='%s' value='%s'>Apply</button>", SUBMIT, SUBMIT_APPLY);
      html += "<span style='margin-right: 1em;'></span>";
      appendf(html, "<button type='submit' name='%s' value='%s'>Reboot</button>", SUBMIT, SUBMIT_REBOOT);
      html += "</form></body></html>";

      // Send HTTP response
      client.println("HTTP/1.1 200 OK");
      client.println("Content-Type: text/html");
      client.print("Content-Length: ");
      client.println(html.length());
      client.println("Connection: close");
      client.println();
      client.print(html);

      delay(10);
      client.stop();
    }
};

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901

wlan.h - WiFi Management Library for Raspberry Pi Pico W

This program is free software: you can redistribute it and/or

modify it under the terms of the GNU General Public License as

published by the Free Software Foundation, either version 3 of

the License, or at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <https://www.gnu.org/licenses/>.

Boards Manager: https://arduino-pico.readthedocs.io/

----------------------------------------------------

Flash Size: "2MB (Sketch 1MB, FS: 1MB)

WiFi Resion: "Japan"

----------------------------------------------------

#pragma once

#include <algorithm>

#include <vector>

#include <map>

#include <functional>

#include <stdio.h>

#include <stdarg.h>

#include <string.h>

#include <time.h>

#include <Arduino.h>

#include <EEPROM.h>

#include <LEAmDNS.h>

#include <ArduinoOTA.h> /* ArduinoOTA.cpp: #include <SimpleMDNS.h> --> <LEAmDNS.h> */

#include <ArduinoMqttClient.h> /* MqttClient.h: #define MQTT_CLIENT_STD_FUNCTION_CALLBACK */

#include "wsta.h"

class WLan : public WSta

{

public:

typedef enum struct NOTIFY

{

WIFI_CONNECTED,

WIFI_DISCONNECTED,

MQTT_CONNECTED,

MQTT_DISCONNECTED,

};

typedef std::function<void(WLan& wlan, NOTIFY status)> notify_t;

typedef std::function<void(WLan& wlan, const String& topic, const void* payload, size_t size)> mqtt_message_t;

WLan(bool led = true) : WSta(led)

{

_mqtt_client = new MqttClient(_wifiClient);

_mqtt_broker.connected = false;

memset(&_uptime, 0, sizeof(_uptime));

}

virtual ~WLan(void)

{

end();

delete _mqtt_client;

WSta::~WSta();

}

void begin(bool init = false)

{

EEPROM.begin(4096);

EEPROM.get<decltype(_conf)>(0, _conf);

if (init || (_conf.mark != CONF_CHECK_MARK))

{

memset(&_conf, 0, sizeof(_conf));

_conf.mark = CONF_CHECK_MARK;

_conf.dhcp = true;

strncpy(_conf.sys_password, udn(), sizeof(_conf.sys_password));

EEPROM.put<decltype(_conf)>(0, _conf);

EEPROM.commit();

}

if (!IPAddress(_conf.subnet).isSet())

memcpy(_conf.subnet, &IPAddress(255, 255, 255, 0)[0], sizeof(_conf.subnet));

if (_conf.mqtt_port == 0)

_conf.mqtt_port = 1883;

/* Check AP Mode */

if ((_ap_mode = !*_conf.ssid))

beginAP();

}

void end(void)

{

if (_ap_mode)

endAP();

else

disconnected();

}

bool apmode(void)

{

return _ap_mode;

}

void notify(notify_t callback)

{

_notify = callback;

}

void mqtt_auth(const String& username, const String& password)

{

_mqtt_client->setUsernamePassword(username, password);

}

void mqtt_keepalive_interval(uint32_t interval)

{

_mqtt_client->setKeepAliveInterval(interval);

}

void mqtt_connection_timeout(uint32_t timeout)

{

_mqtt_client->setConnectionTimeout(timeout);

}

void mqtt_tx_payload_size(uint16_t size)

{

_mqtt_client->setTxPayloadSize(size);

}

void mqtt_clean_session(bool clean)

{

_mqtt_client->setCleanSession(clean);

}

void mqtt_will_message(const String& topic, const void* payload = nullptr, size_t size = 0, bool retain = false, uint8_t qos = 0)

{

_mqtt_client->beginWill(topic, size, retain, qos);

if (payload && size)

_mqtt_client->write((uint8_t*)payload, size);

_mqtt_client->endWill();

}

void mqtt_publish(const String& topic, const void* payload = nullptr, size_t size = 0, bool retain = false, uint8_t qos = 0, bool dup = false)

{

_mqtt_client->beginMessage(topic, size, retain, qos, dup);

if (payload && size)

_mqtt_client->write((uint8_t*)payload, size);

_mqtt_client->endMessage();

}

void mqtt_subscribe(const String& topic, uint8_t qos = 0)

{

_mqtt_client->subscribe(topic, qos);

}

void mqtt_message(mqtt_message_t callback)

{

_mqtt_client->onMessage

(

[this, callback] (MqttClient* client, int messageSize)

{

String topic = client->messageTopic();

if (callback)

{

char payload[messageSize];

client->read((uint8_t*)payload, messageSize);

callback(*this, topic, payload, messageSize);

}

);

}

bool run(void)

{

uptime();

if (_ap_mode)

{

http_server();

connect_led(true);

}

else if (WSta::run())

{

http_server();

mqtt_client();

ArduinoOTA.handle();

return !*_conf.mqtt_host || _mqtt_client->connected();

}

return false;

}

uint64_t uptime(void)

{

uint32_t t = millis();

_uptime.msec += t - _uptime.save;

_uptime.save = t;

return _uptime.msec;

}

const char* udn(void)

{

if (*_udn == 0)

{

/* Creating Unique Device Name */

uint8_t mac[WL_MAC_ADDR_LENGTH];

WiFi.macAddress(mac);

#if defined(ARDUINO_RASPBERRY_PI_PICO_2W)

snprintf(_udn, sizeof(_udn), "pico2w-%02x%02x%02x", mac[WL_MAC_ADDR_LENGTH - 3], mac[WL_MAC_ADDR_LENGTH - 2], mac[WL_MAC_ADDR_LENGTH - 1]);

#else

snprintf(_udn, sizeof(_udn), "picow-%02x%02x%02x", mac[WL_MAC_ADDR_LENGTH - 3], mac[WL_MAC_ADDR_LENGTH - 2], mac[WL_MAC_ADDR_LENGTH - 1]);

#endif

}

return _udn;

}

protected:

virtual void wifi_connected(void)

{

if (_notify)

_notify(*this, NOTIFY::WIFI_CONNECTED);

}

virtual void wifi_disconnected(void)

{

if (_notify)

_notify(*this, NOTIFY::WIFI_DISCONNECTED);

}

virtual void mqtt_connected(void)

{

if (_notify)

_notify(*this, NOTIFY::MQTT_CONNECTED);

}

virtual void mqtt_disconnected(void)

{

if (_notify)

_notify(*this, NOTIFY::MQTT_DISCONNECTED);

}

private:

static constexpr const uint32_t CONF_CHECK_MARK = 0xCAFEBABE;

static constexpr const uint16_t HTTP_SERVER_PORT = 80;

static constexpr const char* HTTP_GET = "GET";

static constexpr const char* HTTP_POST = "POST";

static constexpr const char* CONTENT_TYPE = "Content-Type:";

static constexpr const char* CONTENT_LENGTH = "Content-Length:";

static constexpr const char* URLENCODED = "application/x-www-form-urlencoded";

static constexpr const char* URL_SETTING = "/";

static constexpr const char* STA_SSID = "ssid";

static constexpr const char* STA_PSWD = "pswd";

static constexpr const char* STA_DHCP = "dhcp";

static constexpr const char* STA_LOCAL_IP = "local_ip";

static constexpr const char* STA_SUBNET = "subnet";

static constexpr const char* STA_GATEWAY = "gateway";

static constexpr const char* STA_DNS_SERVER = "dns_server";

static constexpr const char* AP_LOCAL_IP = "ap_local_ip";

static constexpr const char* AP_SUBNET = "ap_subnet";

static constexpr const char* MQTT_HOST = "mqtt_host";

static constexpr const char* MQTT_PORT = "mqtt_port";

static constexpr const char* SNTP_SERVER = "sntp_server";

static constexpr const char* SNTP_TZNAME = "sntp_tzname";

static constexpr const char* SYS_PASSWORD = "sys_password";

static constexpr const char* SUBMIT = "submit";

static constexpr const char* SUBMIT_RESCAN = "rescan";

static constexpr const char* SUBMIT_APPLY = "apply";

static constexpr const char* SUBMIT_REBOOT = "reboot";

typedef struct

{

uint32_t mark;

char ssid[32];

char pswd[64];

bool dhcp;

uint8_t local_ip [4];

uint8_t subnet [4];

uint8_t gateway [4];

uint8_t dns_server[4];

char mqtt_host[32];

uint16_t mqtt_port;

char sntp_server[32];

char sntp_tzname[32];

char sys_password[32];

} net_conf_t;

typedef struct

{

String name;

IPAddress addr;

uint16_t port;

bool connected;

} mqtt_broker_t;

typedef struct

{

uint32_t save;

uint64_t msec;

} uptime_t;

WiFiServer _http_server;

WiFiClient _wifiClient;

MqttClient *_mqtt_client;

bool _ap_mode;

net_conf_t _conf;

char _udn[16];

uptime_t _uptime;

mqtt_broker_t _mqtt_broker;

notify_t _notify;

void beginAP(void)

{

WiFi.beginAP(udn(), _conf.sys_password);

_http_server.begin(HTTP_SERVER_PORT);

}

void endAP(void)

{

_http_server.stop();

WiFi.disconnectAP();

}

void connect(void) override

{

if (*_conf.ssid)

{

WiFi.disconnect();

if (_conf.dhcp)

WiFi.config(IPAddress(), IPAddress(), IPAddress(), IPAddress());

else

WiFi.config(IPAddress(_conf.local_ip), IPAddress(_conf.dns_server),

IPAddress(_conf.gateway), IPAddress(_conf.subnet));

WiFi.beginNoBlock(_conf.ssid, _conf.pswd);

}

void connected(uint32_t conn_time) override

{

(void)conn_time;

if (*_conf.sntp_server)

{

NTP.begin(_conf.sntp_server);

if (*_conf.sntp_tzname)

{

setenv("TZ", _conf.sntp_tzname, 1);

tzset();

}

_http_server.begin(HTTP_SERVER_PORT);

_mqtt_client->setId(udn());

ArduinoOTA.setHostname(udn());

ArduinoOTA.setPassword(_conf.sys_password);

ArduinoOTA.begin();

wifi_connected();

}

void disconnected(void) override

{

wifi_disconnected();

if (_mqtt_broker.connected)

mqtt_disconnected();

_mqtt_broker.connected = false;

ArduinoOTA.end();

_mqtt_client->stop();

_http_server.stop();

sntp_stop();

}

bool query_mqtt_Broker(void)

{

_mqtt_broker.addr.clear();

if (*_conf.mqtt_host)

{

_mqtt_broker.addr.fromString(_conf.mqtt_host);

if (_mqtt_broker.addr.isSet())

{

/* Fixed IP Address */

_mqtt_broker.name = _mqtt_broker.addr.toString();

_mqtt_broker.port = _conf.mqtt_port;

}

else

{

// MDNS Query Service (MQTT)

int index = MDNS.queryService("mqtt", "tcp");

if (index)

{

if ((strcmp(_conf.mqtt_host, "*") == 0) || (strcmp(_conf.mqtt_host, "*.local") == 0))

index = 0;

else

{

/* Fixed Host Name */

while (--index >= 0)

{

if (strcasecmp(MDNS.answerHostname(index), _conf.mqtt_host) == 0)

break;

}

if (index >= 0)

{

_mqtt_broker.name = MDNS.answerHostname(index);

_mqtt_broker.addr = MDNS.answerIP(index);

_mqtt_broker.port = MDNS.answerPort(index);

}

MDNS.removeQuery();

}

return _mqtt_broker.addr.isSet();

}

void mqtt_client(void)

{

if (_mqtt_client->connected())

_mqtt_client->poll();

else if (_mqtt_broker.connected)

{

_mqtt_broker.connected = false;

mqtt_disconnected();

_mqtt_client->stop();

}

else if (query_mqtt_Broker())

{

if (_mqtt_client->connect(_mqtt_broker.addr, _mqtt_broker.port))

{

_mqtt_broker.connected = true;

mqtt_connected();

}

static void strncpy(char* dst, const char* src, size_t len)

{

if (len)

{

::strncpy(dst, src, len);

dst[len - 1] = 0;

}

static void appendf(String& str, const char* format, ...)

{

va_list ap;

va_start(ap, format);

while (1)

{

const char* p = strchr(format, '%');

if (p)

{

str += String(format, (size_t)p - (size_t)format);

switch (p[1])

{

case '%': str += '%'; break;

case 'd': str += va_arg(ap, int); break;

case 'u': str += va_arg(ap, unsigned int); break;

case 's': str += va_arg(ap, const char*); break;

case '\0': --p; /* fall through */

default :

str += "<%";

if (p[2]) str += p[2];

str += '>';

break;

}

format = &p[2];

}

else

{

str += format;

break;

}

va_end(ap);

}

static String urlencoded(const String& str)

{

String rv = str;

int pos;

rv.replace('+', ' ');

while ((pos = rv.indexOf('%')) >= 0)

{

char h = rv[pos + 1];

char l = rv[pos + 2];

h = (h >= 'a' ? h - 'a' + 10 : (h >= 'A' ? h - 'A' + 10 : h - '0'));

l = (l >= 'a' ? l - 'a' + 10 : (l >= 'A' ? l - 'A' + 10 : l - '0'));

char c = (h << 4) + l;

rv = rv.substring(0, pos) + c + rv.substring(pos + 3);

}

return rv;

}

void http_server(void)

{

WiFiClient client = _http_server.accept();

if (!client)

return;

// Wait for the client to send data

for (uint32_t t = millis(); !client.available(); delay(1))

{

if (!client.connected() || (millis() - t >= 1000))

{

client.stop();

return;

}

// Read HTTP Header

String method, url, http, type, str;

std::map<String, String> params;

int length = -1;

char buf[256];

{

str = client.readStringUntil('\r');

client.read(); /* skip '\n' */

if (method.length() == 0)

{

int pos = str.indexOf(' ');

if (pos > 0)

{

method = str.substring(0, pos);

method.trim();

url = str.substring(pos + 1);

url.trim();

pos = url.indexOf(' ');

if (pos > 0)

{

http = str.substring(pos + 1);

http.trim();

url = url.substring(0, pos);

}

else

method = "UNKNOWN";

}

else if (str.startsWith(CONTENT_TYPE))

{

type = str.substring(strlen(CONTENT_TYPE));

type.trim();

}

else if (str.startsWith(CONTENT_LENGTH))

length = str.substring(strlen(CONTENT_LENGTH)).toInt();

}

while (str.length());

/* Parse URL Parameters */

int pos = url.indexOf('?');

if (pos > 0)

{

str = url.substring(pos + 1);

url = url.substring(0, pos);

while (str.length())

{

pos = str.indexOf('&');

String key, val;

if (pos >= 0)

{

key = str.substring(0, pos);

str = str.substring(pos + 1);

}

else

{

key = str;

str = "";

}

pos = key.indexOf('=');

if (pos >= 0)

{

val = urlencoded(key.substring(pos + 1));

key = urlencoded(key.substring(0, pos));

params[key] = val;

}

/* Parse POST Parameters */

if (method.equals(HTTP_POST) && type.equals(URLENCODED) && (length > 0))

{

int l, m, r;

l = 0;

while (length > 0)

{

int n = client.read(buf + l, min(length, (int)sizeof(buf) - l));

if (n <= 0)

break;

length -= n;

n += l;

l = r = 0;

m = -1;

while (r < n)

{

char c = buf[r++];

if (c == '=')

m = r;

if ((c == '&') || ((r == n) && (length == 0)))

{

if (m >= 0)

{

String key = urlencoded(String(buf + l, m - l - 1));

String val = urlencoded(String(buf + m, r - m - (c == '&')));

params[key] = val;

}

l = r;

m = -1;

}

n -= l;

memcpy(buf, buf + l, n);

l = n;

}

/* Setting Form Parameters */

if (url.equals(URL_SETTING))

{

String submit = params[SUBMIT];

if (submit.equals(SUBMIT_REBOOT))

rp2040.reboot();

else if (submit.equals(SUBMIT_APPLY))

{

/* Data Save to EEPROM */

for (int i = 0;; ++i)

{

String ssid = STA_SSID;

String pswd = STA_PSWD;

ssid += i;

pswd += i;

if (!params.contains(ssid))

break;

ssid = params[ssid];

pswd = params[pswd];

if (pswd.length())

{

strncpy(_conf.ssid, ssid.c_str(), sizeof(_conf.ssid));

strncpy(_conf.pswd, pswd.c_str(), sizeof(_conf.pswd));

break;

}

IPAddress local_ip, subnet, gateway, dns_server;

local_ip.fromString(params[STA_LOCAL_IP]);

subnet.fromString(params[STA_SUBNET]);

gateway.fromString(params[STA_GATEWAY]);

dns_server.fromString(params[STA_DNS_SERVER]);

_conf.dhcp = params[STA_DHCP].toInt();

memcpy(_conf.local_ip, &local_ip[0], sizeof(_conf.local_ip));

memcpy(_conf.subnet, &subnet[0], sizeof(_conf.subnet));

memcpy(_conf.gateway, &gateway[0], sizeof(_conf.gateway));

memcpy(_conf.dns_server, &dns_server[0], sizeof(_conf.dns_server));

strncpy(_conf.mqtt_host, params[MQTT_HOST].c_str(), sizeof(_conf.mqtt_host));

_conf.mqtt_port = params[MQTT_PORT].toInt();

strncpy(_conf.sntp_server, params[SNTP_SERVER].c_str(), sizeof(_conf.sntp_server));

strncpy(_conf.sntp_tzname, params[SNTP_TZNAME].c_str(), sizeof(_conf.sntp_tzname));

if (params[SYS_PASSWORD].length())

strncpy(_conf.sys_password, params[SYS_PASSWORD].c_str(), sizeof(_conf.sys_password));

EEPROM.put<decltype(_conf)>(0, _conf);

EEPROM.commit();

}

// Build a simple HTML response

String html = "<!DOCTYPE html><html><body>";

html += "<h1>";

html += udn();

html += " — WiFi Setting</h1>";

appendf(html, "<form action='%s' method='post'>", URL_SETTING);

/* Scan Network */

struct ap_t

{

String ssid;

int rssi;

};

std::vector<struct ap_t> scan;

int count = WiFi.scanNetworks();

for (int i = 0; i < count; ++i)

{

const char* ssid = WiFi.SSID(i);

int rssi = WiFi.RSSI(i);

if (*ssid)

{

bool found = false;

for (auto& ap : scan)

{

if (ap.ssid.equals(ssid))

{

if (ap.rssi < rssi)

ap.rssi = rssi;

found = true;

break;

}

if (!found)

scan.push_back({ ssid, rssi });

}

std::sort(scan.begin(), scan.end(), [](ap_t& a, ap_t& b) { return a.rssi > b.rssi; });

/* Access Point */

html += "<h3>Access Point</h3>";

html += "<table border='1' cellpadding='6'>";

html += "<tr><th>SSID</th><th>PASSWORD</th><th>RSSI</th></tr>";

int index = 0;

for (auto& ap : scan)

{

appendf(html,

"<tr>"

"<td><input type='text' name='%s%d' value='%s' readonly>%s</td>"

"<td><input type='text' name='%s%d' value=''></td>"

"<td>%d</td>"

"</tr>",

STA_SSID, index, ap.ssid.c_str(), ap.ssid.equals(_conf.ssid) ? "<" : "",

STA_PSWD, index, ap.rssi);

++index;

}

appendf(html,

"<tr>"

"<td><input type='text' name='%s%d' value=''></td>"

"<td></td>"

"</tr>",

STA_SSID, index, STA_PSWD, index);

html += "</table>";

/* IP Config */

html += "<p><h3>IP Config</h3>";

html += "<table border='1' cellpadding='6'>";

appendf(html,

"<tr>"

"<td>DHCP</td>"

"<td><select name='%s'><option value='0'%s>Disabled</option><option value='1'%s>Enabled</option></select></td>"

"<td align='center'>%s</td>"

"</tr>",

STA_DHCP, !_conf.dhcp ? " selected" : "", _conf.dhcp ? " selected" : "", _ap_mode ? "AP Mode" : "STA Mode");

appendf(html,

"<tr>"

"<td>Local IP</td>"

"<td><input type='text' name='%s' value='%s'></td>"

"<td>%s</td>"

"</tr>",

STA_LOCAL_IP, IPAddress(_conf.local_ip).toString().c_str(), _ap_mode ? WiFi.softAPIP().toString().c_str() : WiFi.localIP().toString().c_str());

appendf(html,

"<tr>"

"<td>Subnet</td>"

"<td><input type='text' name='%s' value='%s'></td>"

"<td>%s</td>"

"</tr>",

STA_SUBNET, IPAddress(_conf.subnet).toString().c_str(), _ap_mode ? "255.255.255.0" : WiFi.subnetMask().toString().c_str());

appendf(html,

"<tr>"

"<td>Gateway</td>"

"<td><input type='text' name='%s' value='%s''></td>"

"<td>%s</td>"

"</tr>",

STA_GATEWAY, IPAddress(_conf.gateway).toString().c_str(), _ap_mode ? WiFi.softAPIP().toString().c_str() : WiFi.gatewayIP().toString().c_str());

appendf(html,

"<tr>"

"<td>DNS Server</td>"

"<td><input type='text' name='%s' value='%s'></td>"

"<td>%s</td>"

"</tr>",

STA_DNS_SERVER, IPAddress(_conf.dns_server).toString().c_str(), _ap_mode ? WiFi.softAPIP().toString().c_str() : WiFi.dnsIP().toString().c_str());

appendf(html,

"<tr>"

"<td>MAC Address</td>"

"<td></td>"

"<td>%s</td>"

"</tr>",

_ap_mode ? WiFi.softAPmacAddress().c_str() : WiFi.macAddress().c_str());

html += "</table>";

/* MQTT Broker */

html += "<p><h3>MQTT Broker</h3>";

html += "<table border='1' cellpadding='6'>";

str = "";

if ((!_mqtt_broker.name.equals(_mqtt_broker.addr.toString())) && (!_mqtt_broker.name.equals(_conf.mqtt_host)))

str = " (" + _mqtt_broker.name + ")";

appendf(html,

"<tr>"

"<td>Host</td>"

"<td><input type='text' name='%s' value='%s'></td>"

"<td>%s%s</td>"

"</tr>",

MQTT_HOST, _conf.mqtt_host, _mqtt_broker.addr.toString().c_str(), str.c_str());

appendf(html,

"<tr>"

"<td>Port</td>"

"<td><input type='text' name='%s' value='%u'></td>"

"<td>%u</td>"

"</tr>",

MQTT_PORT, _conf.mqtt_port, _mqtt_broker.port);

html += "</table>";

/* SNTP Server */

html += "<p><h3>SNTP Server</h3>";

html += "<table border='1' cellpadding='6'>";

str = "";

if (*_conf.sntp_server)

{

time_t t = time(NULL);

struct tm lt = *localtime(&t);

snprintf(buf, sizeof(buf), "%04d-%02d-%02d %02d:%02d:%02d",

lt.tm_year + 1900, lt.tm_mon + 1, lt.tm_mday, lt.tm_hour, lt.tm_min, lt.tm_sec);

str += buf;

}

appendf(html,

"<tr>"

"<td>Host</td>"

"<td><input type='text' name='%s' value='%s'></td>"

"<td>%s</td>"

"</tr>",

SNTP_SERVER, _conf.sntp_server, str.c_str());

appendf(html,

"<tr>"

"<td>TZ Name</td>"

"<td><input type='text' name='%s' value='%s'></td>"

"<td>Proleptic Format</td>"

"</tr>",

SNTP_TZNAME, _conf.sntp_tzname);

html += "</table>";

/* System */

html += "<p><h3>System</h3>";

html += "<table border='1' cellpadding='6'>";

appendf(html,

"<tr>"

"<td>CPU Frequency</td>"

"<td>%u MHz</td>"

"</tr>",

(unsigned int)(rp2040.f_cpu() / 1000000));

switch (rp2040.getResetReason())

{

case RP2040::PWRON_RESET: str = "Power on" ; break;

case RP2040::RUN_PIN_RESET: str = "GPIO Pin" ; break;

case RP2040::SOFT_RESET: str = "Software" ; break;

case RP2040::WDT_RESET: str = "Watch dog"; break;

case RP2040::DEBUG_RESET: str = "Debug" ; break;

case RP2040::GLITCH_RESET: str = "Glitch" ; break;

case RP2040::BROWNOUT_RESET: str = "Brownout" ; break;

default: str = "Unknown" ; break;

}

appendf(html,

"<tr>"

"<td>Reset Reason</td>"

"<td>%s</td>"

"</tr>",

str.c_str());

str = "";

str += rp2040.getFreeHeap();

for (int len = str.length(); len > 3; len -= 3)

str = str.substring(0, len - 3) + ',' + str.substring(len - 3);

appendf(html,

"<tr>"

"<td>Free Heap Memory</td>"

"<td>%s Bytes</td>"

"</tr>",

str.c_str());

unsigned long t = uptime() / 1000;

snprintf(buf, sizeof(buf), "%lu days, %02lu:%02lu:%02lu",

t / (24 * 60 * 60),

t / (60 * 60) % 24,

t / ( 1 * 60) % 60,

t % 60);

appendf(html,

"<tr>"

"<td>Uptime</td>"

"<td>%s</td>"

"</tr>",

buf);

appendf(html,

"<tr>"

"<td>AP/OTA Password</td>"

"<td><input type='text' name='%s' value=''></td>"

"</tr>",

SYS_PASSWORD);

html += "</table>";

/* Submit Button's */

html += "<p><span style='margin-right: 1em;'></span>";

appendf(html, "<button type='submit' name='%s' value='%s'>Rescan</button>", SUBMIT, SUBMIT_RESCAN);

html += "<span style='margin-right: 1em;'></span>";

appendf(html, "<button type='submit' name='%s' value='%s'>Apply</button>", SUBMIT, SUBMIT_APPLY);

html += "<span style='margin-right: 1em;'></span>";

appendf(html, "<button type='submit' name='%s' value='%s'>Reboot</button>", SUBMIT, SUBMIT_REBOOT);

html += "</form></body></html>";

// Send HTTP response

client.println("HTTP/1.1 200 OK");

client.println("Content-Type: text/html");

client.print("Content-Length: ");

client.println(html.length());

client.println("Connection: close");

client.println();

client.print(html);

delay(10);

client.stop();

}

};

/*
  wsta.h - WiFi STA Library for Raspberry Pi Pico W

  Copyright (c) 2026 Sasapea's Lab. All right reserved.

  This program is free software: you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation, either version 3 of
  the License, or at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once

#include <stdint.h>
#include <stdbool.h>
#include <Arduino.h>
#include <WiFi.h>

class WSta
{
  public:

    static void builtin_led(bool on)
    {
      static bool status;
      if (status != on)
        digitalWrite(PIN_LED, status = on);
    }

    void connect_led(bool connected)
    {
      if (_led)
        builtin_led(millis() / (connected ? LED_BLINK_ONLINE : LED_BLINK_OFFLINE) & 1);
    }

    WSta(bool led = true) : _led(led)
    {
      pinMode(PIN_LED, OUTPUT);
    }

    virtual ~WSta(void)
    {
    }

    uint8_t status(void)
    {
      uint8_t rv = WiFi.status();
      if (_fixed)
      {
        if (_delay)
        {
          if ((rv == WL_CONNECTED) && (millis() - _delay < WIFI_LINK_TIMEOUT))
            rv = _wlstat;
          else
            _delay = 0;
        }
        else if (rv == WL_CONNECTED)
        {
          if (_wlstat != WL_CONNECTED)
          {
            _delay = millis();
            rv = _wlstat;
          }
        }
      }
      connect_led(_wlstat == WL_CONNECTED);
      return _wlstat = rv;
    }

    bool run(void)
    {
      uint8_t rv = status();
      switch (rv)
      {
        case WL_IDLE_STATUS:
        case WL_DISCONNECTED:
        case WL_CONNECT_FAILED:
        case WL_CONNECTION_LOST:
          rv = WL_DISCONNECTED;
          break;
        case WL_CONNECTED:
          break;
        default:
          rv = _status;
          break;
      }
      if (_status != rv)
      {
        switch (rv)
        {
          case WL_DISCONNECTED:
            if (_status == WL_CONNECTED)
              disconnected();
            if ((_start = millis()) == 0)
              --_start;
            connect();
            _fixed  = WiFi.localIP().isSet();
            _wlstat = WL_NO_SHIELD;
            _delay  = 0;
            break;
          case WL_CONNECTED:
            connected(millis() - _start);
            _start = 0;
            break;
          default:
            break;
        }
        _status = rv;
      }
      else if (_start)
      {
        if (millis() - _start >= WIFI_CONN_TIMEOUT)
        {
          _start = 0;
          _status = WL_NO_SHIELD;
        }
      }
      return rv == WL_CONNECTED;
    }

    virtual void connect(void)
    {
    }

    virtual void connected([[maybe_unused]] uint32_t conn_time)
    {
    }

    virtual void disconnected(void)
    {
    }

  private:

    static constexpr uint32_t WIFI_CONN_TIMEOUT  = 20000;
    static constexpr uint32_t WIFI_LINK_TIMEOUT  = 10000;
    static constexpr uint32_t LED_BLINK_OFFLINE  = 200;
    static constexpr uint32_t LED_BLINK_ONLINE   = 1000;

    bool     _led    = true;
    bool     _fixed  = false;
    uint8_t  _status = WL_NO_SHIELD;
    uint8_t  _wlstat = WL_NO_SHIELD;
    uint32_t _delay  = 0;
    uint32_t _start  = 0;
};

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wsta.h - WiFi STA Library for Raspberry Pi Pico W

This program is free software: you can redistribute it and/or

modify it under the terms of the GNU General Public License as

published by the Free Software Foundation, either version 3 of

the License, or at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <https://www.gnu.org/licenses/>.

#pragma once

#include <stdint.h>

#include <stdbool.h>

#include <Arduino.h>

#include <WiFi.h>

class WSta

{

public:

static void builtin_led(bool on)

{

static bool status;

if (status != on)

digitalWrite(PIN_LED, status = on);

}

void connect_led(bool connected)

{

if (_led)

builtin_led(millis() / (connected ? LED_BLINK_ONLINE : LED_BLINK_OFFLINE) & 1);

}

WSta(bool led = true) : _led(led)

{

pinMode(PIN_LED, OUTPUT);

}

virtual ~WSta(void)

{

}

uint8_t status(void)

{

uint8_t rv = WiFi.status();

if (_fixed)

{

if (_delay)

{

if ((rv == WL_CONNECTED) && (millis() - _delay < WIFI_LINK_TIMEOUT))

rv = _wlstat;

else

_delay = 0;

}

else if (rv == WL_CONNECTED)

{

if (_wlstat != WL_CONNECTED)

{

_delay = millis();

rv = _wlstat;

}

connect_led(_wlstat == WL_CONNECTED);

return _wlstat = rv;

}

bool run(void)

{

uint8_t rv = status();

switch (rv)

{

case WL_IDLE_STATUS:

case WL_DISCONNECTED:

case WL_CONNECT_FAILED:

case WL_CONNECTION_LOST:

rv = WL_DISCONNECTED;

break;

case WL_CONNECTED:

break;

default:

rv = _status;

break;

}

if (_status != rv)

{

switch (rv)

{

case WL_DISCONNECTED:

if (_status == WL_CONNECTED)

disconnected();

if ((_start = millis()) == 0)

--_start;

connect();

_fixed = WiFi.localIP().isSet();

_wlstat = WL_NO_SHIELD;

_delay = 0;

break;

case WL_CONNECTED:

connected(millis() - _start);

_start = 0;

break;

default:

break;

}

_status = rv;

}

else if (_start)

{

if (millis() - _start >= WIFI_CONN_TIMEOUT)

{

_start = 0;

_status = WL_NO_SHIELD;

}

return rv == WL_CONNECTED;

}

virtual void connect(void)

{

}

virtual void connected([[maybe_unused]] uint32_t conn_time)

{

}

virtual void disconnected(void)

{

}

private:

static constexpr uint32_t WIFI_CONN_TIMEOUT = 20000;

static constexpr uint32_t WIFI_LINK_TIMEOUT = 10000;

static constexpr uint32_t LED_BLINK_OFFLINE = 200;

static constexpr uint32_t LED_BLINK_ONLINE = 1000;

bool _led = true;

bool _fixed = false;

uint8_t _status = WL_NO_SHIELD;

uint8_t _wlstat = WL_NO_SHIELD;

uint32_t _delay = 0;

uint32_t _start = 0;

};

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