3CH WiFi Relay Control Board


We have recently started stocking in the shop a Three Channel WiFi Relay / Thermostat Board designed by our friend Martin Harizanov.

The board has been well designed to physically separate high voltage AC mains from the low voltage logic. The board has an optional power supply to enable the board to be powered directly from 100-240V AC. A wall-mountable plastic enclosure is included. 

The board can be used to control a heating / AC / humidifier via local control loop from on-board sensor. The unit can be programmed with a schedule and or manually controlled via web UI via WIFI. Sensor data and relay status can be posted to Emoncms for logging and graphing. 

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

Overview

The relay board is a open software/hardware multi-purpose relay board based on the ESP8266 WiFi SoC. It can control up to three AC or DC loads over the Internet using web UI or MQTT.

  • Powerd direct from 230V AC via isolated on-board PSU (optional extra) or 5V DC via micro USB
  • Built-in web server with mobile device friendly UI and HTTP API to control the relays
  • Thermostat function with weekly scheduling
  • Manual relay control via the UI
  • NTP for network time and scheduling functionality
  • Web server settings, including HTTP port and basic HTTP authentication setup
  • Broadcast relay/sensor data using HTTP GET to services like ThingSpeak or Emoncms
    • Integration with ThingSpeak for charting/analytics visualization
  • Temperature sensor support (one of them, not both at the same time) - (optional extra)
    • DS18B20 one-wire temperature: supports multiple sensors
    • DHT22 (AM2302) Humidity & Temperature

Shop:

The relay board can now be purchased direct from our shop: http://shop.openenergymonitor.com/three-channel-wifi-relay-thermostat/

Documentation & Set-up: 

Full technical details and set-up guide are available on Martin's Wiki: https://harizanov.com/wiki/wiki-home/three-channel-wifi-relaythermostat-board/

Related Blog Posts:


Overview demo of the board in action by Paul Reed: 












Posting status & sensor readings to Emoncms






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