When stm32 writes MQTT, it subscribes to multiple topics. How should the program distinguish different topics when receiving?

shijizai

When stm32 writes MQTT, it subscribes to multiple topics. How should the program distinguish different topics when receiving? [Copy link]

When writing MQTT, stm32 subscribes to multiple topics. I don't know how to judge the topic. How to judge? Which topic to judge? I can't debug the program after writing it. Please help.

Jacktang

After the client sends a subscription request to the server, the server will send a publish message to the client. The subscribe message specifies the maximum QoS level.

bigbat

The proxy will reply to your message with the subscription prefix, top/XXXX/message

gzkenny

After sending a subscription request to the server, the server will send a publish message to the client. The subscribe message specifies the maximum QoS.