Loading... Please wait...

WiFi MQTT Relay / Thermostat

£59.99 (inc VAT) £49.99 (exc VAT)
163.00 Grams
Calculated at checkout

2nd Gen WiFi Relay / Thermostat

Multi-purpose relay board based on the ESP8266 WiFi SoC.

Perfect for remote heating an A/C systems control via nodeRED, openHAB and Android Tasker etc. 


  • 1 x 16A Relay
  • Powered by the popular ESP8266 WiFi SoC - (custom firmware upgradable)
  • OTA Firmware upload function
  • Powered direct from 110-240V AC via isolated on-board PSU
  • Built-in web server with mobile device friendly UI and
  • HTTP API to control
  • Thermostat function with weekly scheduling
  • Manual relay control via web interface
  • MQTT support (control & status)
  • NTP for network time and scheduling functionality
  • Web server settings: including HTTP port & authentication setup
  • Temperature sensor support - 1 x sensor included 
  • PCB dimensions: 87mm x 50mm
  • External Enclosure Dimensions: 90.2mm; X: 53.3mm; Z: 57.5mm
  • working temperature of 0°C > +45°C.
  • WiFi 2.4Ghz
  • CE Approved


NOTE: The board connects to and controls high voltage, knowledge and attention is required when installing.




  • WiFi relay board, fully assembled & testing
  • External Temperature Sensor probe - DS18B20 

Documentation & Setup Guide

Setup User Guide

Home Assistant Integration


GitHub ESP8266 Firmware & open-hardware design 


Related Blog Posts:


▼ Product video below is for the older 3ch version, however much of the MQTT control via nodeRED application is still relevant ▼

Product Videos

3 channel wi-fi module - ESP8266 (08:50)
Hardly a technical test! but thought I'd share my first day with Martin Harizanov's brilliant 3 channel wi-fi module. The module does far more than described here, I'm only scratching the surface, but thought that I'd concentrate on it's MQTT features, and try and gain some reassurance that the module would integrate and operate efficiently alongside a Raspberry Pi over MQTT, especially at times of heavy network traffic and Raspberry Pi processing. In the video, using MQTT QoS1, I switch relays on and off at 500mS intervals (that's 120 MQTT messages per minute) at the same time as streaming a HD video from the same Raspberry Pi - all over wi-fi, and the module still manages to switch as regular as a metronome! The poor Raspberry Pi was also processing energy & weather data in emoncms, as well as running node-red, and my blog, so I'm pretty impressed with how it all performed. The module can be purchased direct from Martin Harizanov - https://harizanov.com/shop/ or from the openenergymonitor shop - http://shop.openenergymonitor.com/control-nodes/ here in the UK. The forum link is http://openenergymonitor.org/emon/node/11158
  • 3 channel wi-f...
    Hardly a technical test! but thought I'd share my first day wi...

Customers Who Viewed This Product Also Viewed