Serial.print reason

[pprakash]

Thank you for this wonderful library. I am trying to figure out how to print the reason for MQTT connection failures using Serial.print. I see the definitions in DisconnectReasons.hpp. Can you help in this regard?

[khoih-prog]

It's simple enough by adding a public function to do so, using switch case with AMQTT_LOGDEBUG, for example.

I guess you can do it yourself first.

[pprakash]

I tried below syntax but getting error could not convert '0' from 'int' to 'AsyncMqttClientDisconnectReason' during compilation. I think I am not following the correct procedure here.

void onMqttDisconnect(AsyncMqttClientDisconnectReason reason)
{
    switch (reason) {

      case 0:
      DEBUG_PRINTLN(F("TCP_DISCONNECTED"));
      dbgMqttDiscReason = "TCP_DISCONNECTED"
      break;
  
      case 1:
      DEBUG_PRINTLN(F("MQTT_UNACCEPTABLE_PROTOCOL_VERSION"));
      dbgMqttDiscReason = "MQTT_UNACCEPTABLE_PROTOCOL_VERSION"
      break;

      case 2:
      DEBUG_PRINTLN(F("MQTT_IDENTIFIER_REJECTED"));
      dbgMqttDiscReason = "MQTT_IDENTIFIER_REJECTED"
      break;

      case 3:
      DEBUG_PRINTLN(F("MQTT_SERVER_UNAVAILABLE"));
      dbgMqttDiscReason = "MQTT_SERVER_UNAVAILABLE"
      break;

      case 4:
      DEBUG_PRINTLN(F("MQTT_MALFORMED_CREDENTIALS"));
      dbgMqttDiscReason = "MQTT_MALFORMED_CREDENTIALS"
      break;

      case 5: 
      DEBUG_PRINTLN(F("MQTT_NOT_AUTHORIZED"));
      dbgMqttDiscReason = "MQTT_NOT_AUTHORIZED"
      break;

      case 6:
      DEBUG_PRINTLN(F("ESP8266_NOT_ENOUGH_SPACE"));
      dbgMqttDiscReason = "ESP8266_NOT_ENOUGH_SPACE"
      break;

      case 7:
      DEBUG_PRINTLN(F("TLS_BAD_FINGERPRINT"));
      dbgMqttDiscReason = "TLS_BAD_FINGERPRINT"
      break;
    }

[khoih-prog]

You are doing great. Just missing some ; and you just have to use uint8_t cast from AsyncMqttClientDisconnectReason reason, such as

String dbgMqttDiscReason;

void onMqttDisconnect(AsyncMqttClientDisconnectReason reason)
{ 
  switch ((uint8_t) reason)
  {
    case 0:   //TCP_DISCONNECTED:
      AMQTT_LOGDEBUG(F("TCP_DISCONNECTED"));
      dbgMqttDiscReason = "TCP_DISCONNECTED";
      break;

    case 1:   //MQTT_UNACCEPTABLE_PROTOCOL_VERSION:
      AMQTT_LOGDEBUG(F("MQTT_UNACCEPTABLE_PROTOCOL_VERSION"));
      dbgMqttDiscReason = "MQTT_UNACCEPTABLE_PROTOCOL_VERSION";
      break;

    case 2:   //MQTT_IDENTIFIER_REJECTED:
      AMQTT_LOGDEBUG(F("MQTT_IDENTIFIER_REJECTED"));
      dbgMqttDiscReason = "MQTT_IDENTIFIER_REJECTED";
      break;

    case 3:   //MQTT_SERVER_UNAVAILABLE:
      AMQTT_LOGDEBUG(F("MQTT_SERVER_UNAVAILABLE"));
      dbgMqttDiscReason = "MQTT_SERVER_UNAVAILABLE";
      break;

    case 4:   //MQTT_MALFORMED_CREDENTIALS:
      AMQTT_LOGDEBUG(F("MQTT_MALFORMED_CREDENTIALS"));
      dbgMqttDiscReason = "MQTT_MALFORMED_CREDENTIALS";
      break;

    case 5:   //MQTT_NOT_AUTHORIZED:
      AMQTT_LOGDEBUG(F("MQTT_NOT_AUTHORIZED"));
      dbgMqttDiscReason = "MQTT_NOT_AUTHORIZED";
      break;

    case 6:   //ESP8266_NOT_ENOUGH_SPACE:
      AMQTT_LOGDEBUG(F("ESP8266_NOT_ENOUGH_SPACE"));
      dbgMqttDiscReason = "ESP8266_NOT_ENOUGH_SPACE";
      break;

    case 7:   //TLS_BAD_FINGERPRINT:
      AMQTT_LOGDEBUG(F("TLS_BAD_FINGERPRINT"));
      dbgMqttDiscReason = "TLS_BAD_FINGERPRINT";
      break;

    default:
      break;
  }

  connectedMQTT = false;

  Serial.println("Disconnected from MQTT.");
}

[pprakash]

Thanks @khoih-prog ... works perfect.