2 layers74 × 34 mm

EMS Bus Gateway
mariusgreuel/EMS-Bus-Gateway
EMS Bus Gateway for Buderus Boilers to run EMS-ESP32
48 parts21GPL-3.0
KiCad boards from 2 GitHub repositories tagged “heatpump”, the most starred first; open any of them in PCBKit.

mariusgreuel/EMS-Bus-Gateway
EMS Bus Gateway for Buderus Boilers to run EMS-ESP32

hansrune/HeatPumpControl
ESP32c3 board with IR blaster and serial ports for heat pump control over local WiFi with ESPHome or ESPEasy firmwares