Was mir dazu aber noch einfällt; du kannst ja mal schauen was da in "mqtt.fx" "subscribt" wird, wenn du dein Topic mit Payload "publischst".
Das sieht bei mir dann so aus, wenn ich das Relais einschalte(ON = 1) : und im mqtt.LOG
Code: Alles auswählen
2021-07-18 10:14:40,224 INFO --- MqttFX ClientModel : attempt to add PublishTopic
2021-07-18 10:14:40,225 INFO --- MqttFX ClientModel : sucessfully published message 1
to topic cmnd/esp32_01/POWER1 (QoS 0, Retained: false)
2021-07-18 10:14:40,225 INFO --- MqttFX ClientModel : messageArrived() with topic: cmnd/esp32_01/POWER1
2021-07-18 10:14:40,225 INFO --- MqttFX ClientModel : messageArrived() added: message #110 to topic 'cmnd/esp32_01/POWER1'
2021-07-18 10:14:40,340 INFO --- MqttFX ClientModel : messageArrived() with topic: stat/esp32_01/RESULT
2021-07-18 10:14:40,341 INFO --- MqttFX ClientModel : messageArrived() added: message #111 to topic 'stat/esp32_01/RESULT'
2021-07-18 10:14:40,381 INFO --- MqttFX ClientModel : messageArrived() with topic: stat/esp32_01/POWER1
2021-07-18 10:14:40,381 INFO --- MqttFX ClientModel : messageArrived() added: message #112 to topic 'stat/esp32_01/POWER1'