• Skip to main content
  • Skip to primary sidebar

RNTLab.com

The Ultimate Shortcut to Learn Electronics and Programming with Open Source Hardware and Software

  • Courses
  • Forum
    • Forum
    • Ask Question
  • Shop
  • Account
  • Blog
  • Login

Not accepting multiple MQTT clients

Q&A Forum › Category: Home Automation › Not accepting multiple MQTT clients
0 Vote Up Vote Down
Dan asked 7 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
0 Vote Up Vote Down
Rui Santos Staff answered 7 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

Primary Sidebar

Login to Ask or Answer Questions

This Forum is private and it’s only available for members enrolled in our Courses.

Login »

Latest Course Updates

  • [eBook Updated] Learn Raspberry Pi Pico/Pico W with MicroPython eBook – Version 1.2 May 26, 2025
  • [New Edition] Build ESP32-CAM Projects eBook – 2nd Edition April 16, 2025

You must be logged in to view this content.

Contact Support - Refunds - Privacy - Terms - MakerAdvisor.com - Member Login

Copyright © 2013-2025 · RandomNerdTutorials.com · All Rights Reserved

Insert/edit link

Enter the destination URL

Or link to existing content

    No search term specified. Showing recent items. Search or use up and down arrow keys to select an item.