Learning Tai Chi Maker - mqtt Chapter 2 (V) heartbeat mechanism

Video link ：https://www.bilibili.com/video/BV18t4y1k7Eb/?spm_id_from=autoNext&vd_source=b91967c499b23106586d7aa35af46413

The data link ：http://www.taichi-maker.com/homepage/esp8266-nodemcu-iot/iot-tuttorial/mqtt-tutorial/2-5-keep-alive/

In the hospital , The doctor uses the heartbeat to determine whether the patient still has vital signs . about MQTT For the server , It has to judge one MQTT Whether the client is still connected can check whether the client often sends messages to the server . If you often receive messages from the client , So no problem , This client must be online .

But some clients do not often send messages to the server . For this client , The server can use a method similar to heartbeat detection , To determine whether the client is online .

If you use MQTT.fx The software sets the heartbeat interval , How to set it ？

Click on the gear icon