Not accepting multiple MQTT clients

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Dan asked 2 years ago

Great course. I have multiple clients trying to communication via MQTT. Either client working alone works perfectly. When the second unit brought on-line the first unit quits communicating.
Thoughts?

Question Tags: MQTT

1 Answers

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Rui Santos Staff answered 2 years ago

Which course are you following? Basically, each MQTT client (ESP32, ESP8266, or Arduino) needs to have a unique client name.

For example, if you open this MQTT client example: https://github.com/RuiSantosdotme/Home-Automation-Course/blob/master/code/v2/mqtt_esp8266_final.ino

Lines: 180 and 249 should have the same unique name for each MQTT client.
By default:

client.connect("ESP8266Client");

Change to something like this in Lines: 180 and 249:

client.connect("ESP8266Kitchen");

I hope that helps.

Regards,
Rui