Replace Wemos D1 mini with Wemos D1 mini ESP32

README.org

@@ -1,6 +1,6 @@
 * Muraqib
 
-CO2 sensor that collects and sends its data via MQTT to a server. The board of the sensor is the Wemos D1 mini and the sensor is a SCD41.
+CO2 sensor that collects and sends its data via MQTT to a server. The board of the sensor is the Wemos D1 mini ESP32 and the sensor is a SCD41.
 
 ** Pinout of the board
 

include/wlan.h

@@ -3,12 +3,11 @@
 
 #include "config.h"
 #include <AsyncMqttClient.h>
-#include <ESP8266WiFi.h>
 #include <Ticker.h>
+#include <WiFi.h>
 
 static AsyncMqttClient mqtt_client;
 static Ticker mqtt_connection_timer, wlan_connection_timer;
-static WiFiEventHandler connection_handler, disconnection_handler;
 extern Config *config;
 
 void initialize_wlan();
@@ -19,9 +18,7 @@ void connect_wlan();
 
 void connect_mqtt();
 
-void on_wlan_connection(const WiFiEventStationModeGotIP &event);
-
-void on_wlan_disconnection(const WiFiEventStationModeDisconnected &event);
+void wlan_connection_handler(WiFiEvent_t event);
 
 void on_mqtt_connection(bool session);
 

platformio.ini

@@ -9,11 +9,11 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [env:d1_mini]
-platform = espressif8266
-board = d1_mini
+platform = espressif32
+board = wemos_d1_mini32
 board_build.filesystem = littlefs
 framework = arduino
-monitor_filters = esp8266_exception_decoder
+monitor_filters = esp32_exception_decoder
 lib_deps =
   sensirion/Sensirion I2C SCD4x@^1.1.0
   marvinroger/AsyncMqttClient@^0.9.0

src/wlan.cpp

@@ -1,10 +1,6 @@
 #include "wlan.h"
 
-void initialize_wlan() {
-    connection_handler = WiFi.onStationModeGotIP(on_wlan_connection);
-    disconnection_handler =
-        WiFi.onStationModeDisconnected(on_wlan_disconnection);
-}
+void initialize_wlan() { WiFi.onEvent(wlan_connection_handler); }
 
 void initialize_mqtt() {
     mqtt_client.onConnect(on_mqtt_connection);
@@ -21,15 +17,19 @@ void connect_mqtt() {
     mqtt_client.connect();
 }
 
-void on_wlan_connection(const WiFiEventStationModeGotIP &event) {
-    Serial.println("WiFi connected");
-    connect_mqtt();
-}
-
-void on_wlan_disconnection(const WiFiEventStationModeDisconnected &event) {
-    Serial.println("WiFi disconnected");
-    mqtt_connection_timer.detach();
-    wlan_connection_timer.once(2, connect_wlan);
+void wlan_connection_handler(WiFiEvent_t event) {
+    Serial.printf("[WiFi-event] event: %d\n", event);
+    switch (event) {
+    case SYSTEM_EVENT_STA_GOT_IP:
+        Serial.println("WiFi connected");
+        connect_mqtt();
+        break;
+    case SYSTEM_EVENT_STA_DISCONNECTED:
+        Serial.println("WiFi disconnected");
+        mqtt_connection_timer.detach();
+        wlan_connection_timer.once(2, connect_wlan);
+        break;
+    }
 }
 
 void on_mqtt_connection(bool session) {