Master OpenTherm Shield

Master OpenTherm Shield can be used for building DIY OpenTherm Thermostat or can be used as part of the ESP8266 OpenTherm Gateway or Arduino OpenTherm Gateway
You just need to follow these simple steps:

• Solder corresponding headers, screw therminal block
• Stack WeMos/LOLIN D1 mini or WeMos D1 MINI ESP32 board (it is also can be used with Arduino or Raspberry Pi boards)
• Install OpenTherm Library into Arduino IDE
• Flash sample sketch (don't forget to update pins configuration)

It cannot be connected in parallel with an existing thermostat, in this case you need Arduino OpenTherm Gateway or ESP OpenTherm Gateway.

ESP8266 is not included. Please check PARTS LIST tab