Descriptions

ESP32-C3 based WiFi to EBUS adapter powered from EBUS.

No need for external power supply or optical isolation.
Just connect to your EBUS with 2 wires and you are done.
Unsecured AP will appear on first start to setup connection to WiFi network.
EBUS voltage level is set electronically from a web interface.

Wiki & External Links

SW and Documentation
3D-printable case by Volkmar

Developed with Vaillant ecoTEC pro. Confirmed to be working with multiple types of Vaillant, Wolf, Ariston, Saunier Duval, Protherm and others.