this is my code :
i can publish mqtt to topic /start_topic
but when i publish “senddata” to topic /callback by another program
my callback function mqtt_message_received_event not working
how can i fix it ?
but when i change
self.listen_event(self.mqtt_message_received_event, “MQTT_MESSAGE”, namespace = “mqtt”,topic=“/callback”) to self.listen_event(self.mqtt_message_received_event)
