EMS interface boards
The EMS interface boards are compatible with all EMS versions like EMS, EMS+ and Heatronic. They a 3,3V-5V compatible interface for interfacing with a standard UART (serial port) of a microcontroller like the Arduino and the ESP8266.
The latest version V3.1 looks like this:
And older versions have similar features but a different design:
The information in this section is for all versions of the board, even the ‘old’ ones. If you have an old version like the V0.9 board, and it still works fine, there is no need to upgrade to a newer version.