ESP32/ESP8266 OpenTherm Gateway

This means that you can use the OpenTherm Gateway to:

• See what messages are being sent between the thermostat and the boiler.
• Change the messages that are being sent between the thermostat and the boiler.
• Send your own messages to the thermostat or the boiler.

This can be useful for a number of purposes, such as:

• Troubleshooting problems with your heating system.
• Optimizing your heating system for efficiency.
• Creating custom integrations with other smart home devices.

You just need to follow these simple steps:

• Solder corresponding headers, screw therminal blocks to Master and Slave OpenTherm Shields
• Solder female headers to Wemos D1 mini Expansion Shield
• Stack Master, Slave OpenTherm Shields and WeMos/LOLIN D1 mini or WeMos D1 MINI ESP32 board
• Install OpenTherm Library into Arduino IDE
• Flash sample sketch (don't forget to update pins configuration)

OpenTherm Gateway can't be used as power source for a thermostat. Low power mode is supported only.

ESP32 or ESP8266 is not included. Please check parts list below