HI Sara When I use arduino to programm the esp32 c3 without the rtos , the reading is correct on the same board, so it’s not the wiring. I found comments on internet about the effect of wifi on the onewire timing..

Hi.
Usually that error means bad wiring or a faulty sensor.
Regards,
Sara

Hi.
After the reference modification, the situation is still the same and nothing has changed.

Hi.
Add the following line
xTimerStop(wifiReconnectTimer, 0);

In this section (see newline in bold):

Serial.printf(“[WiFi-event] event: %d\n”, event);
switch(event) {
case ARDUINO_EVENT_WIFI_STA_GOT_IP:
Serial.println(“WiFi connected”);
Serial.println(“IP address: “);
Serial.println(WiFi.localIP());
xTimerStop(wifiReconnectTimer, 0);
connectToMqtt();
break;

Let me know if this fixes the issue…
Regards,
Sara

The relevant function libraries I use include:
1-a. github.com/mathieucarbou/AsyncTCP/tree/main
-b. github.com/me-no-dev/AsyncTCP
2. github.com/khoih-prog/AsyncTCP_SSL
3. github.com/khoih-prog/AsyncMQTT_Generic

ps: async-mqtt-client-master, Because this library cannot use 8883 port

Because this message contains watchdog and CPU crashes,
So I removed mqttReconnectTimer and changed it to AsyncMqttClient connection in loop(), but the problem was not solved.
So I completely released the ~AsyncMqttClient object and re-created it.
But the connection still fails. The strange thing is that when I restart the ESP32, the AsyncMqttClient connection works fine.

Hi.
Currently I rely on ESPAsyncWebServer,
No problem until step 4,
But after adding the AsyncMqttClient part, there is no problem with communication.
But as long as the connection is interrupted due to unknown reasons of mqttHost,
At this time, I will fall into the event of infinite connection [onMqttConnect] and connection interruption [onMqttDisconnect]. Until the watchdog crashes or I manually restart the ESP32, the AsyncMqttClient connection can resume normal communication.

Hi.
Can you better explain the issue you’re facing?
Regards,
Sara

My MQTT_HOST is “https://www.emqx.com/en”
But when I used AsyncMqttClient, I found that disconnection and reconnection would always fail.
This is the case even if I delete AsyncMqttClient and re-create it,
It wasn’t until I restarted my device that I could connect normally,
Do you know the reason and can you give me some suggestions?