Android Question MQTT between Android and ESP

[james_sgp]

Hi, I`m trying to get the MQTT setup between an ESP board and B4A. I have tested the MQTT with Autodiscovery between two phones and works perfectly, however, I can`t get it to work with the ESP. The code on the ESP is waiting for topic and I don`t see how that is used in the B4A MQTT example?

 

[Erel]

The auto discovery part is not related to MQTT. It is just used to find the broker ip address.

Example of MQTT with ESP: https://www.b4x.com/android/forum/threads/mqtt.65669/#content

 

[james_sgp]

Sorry, I meant I was using the sample code of MQTT Chat with Autodiscovery (https://www.b4x.com/android/forum/threads/mqtt-chat-with-auto-discovery.75713/#content); by using this I don`t see where to put a topic. Looking at the rMQTT code, it also waits for a topic?

 

[james_sgp]

OK, I think I`ve answered my own question. In the MQTT Chat example (shown above) the topic is hardcoded into the Publish2 statements as 'ALL' is this correct, so in rMQTT I can hardcode the topic the same?

 

[Erel]

You can subscribe to whichever topic you like. Not sure that I understand the problem.

 

[james_sgp]

Apologies, it's me not properly going through code (too many projects at once....haha). I couldn`t see how to send the topic name, then realized it was part of the Publish2 command.