| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-S2 | ESP32-S3 | | ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- | | | ✓ | ? | ? | ? | ? | ? | ? | # ESP-IDF Opentherm This component provides an implementation of Opentherm protocol with ESP-IDF. Tested on ESP-IDF > 5 version. ## How to Use Example Before project configuration and build, be sure to set the correct chip target using `idf.py set-target `. ### Hardware Required * A development board (e.g., ESP32-S3-DevKitC, ESP32-C6-DevKitC etc.) * A USB cable for Power supply and programming * An opentherm adapter See [Development Boards](https://www.espressif.com/en/products/devkits) for more information about it. ### Configure the Project Open the project configuration menu (`idf.py menuconfig`). In the `OpenTherm Configuration` menu: * Select GPIO in pin * Select GPIO out pin ### Build and Flash Run `idf.py -p PORT flash monitor` to build, flash and monitor the project. (To exit the serial monitor, type ``Ctrl-]``.) See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html) for full steps to configure and use ESP-IDF to build projects. ## Example Output ```text I (9369) OT: ====== OPENTHERM ===== I (9369) OT: Free heap size before: 293684 I (9369) OT: Central Heating: OFF I (9369) OT: Hot Water: OFF I (9369) OT: Flame: OFF I (9379) OT: Fault: NO I (9659) OT: Set CH Temp to: 60 I (9929) OT: Set DHW Temp to: 59 I (10199) OT: DHW Temp: 0.0 I (10469) OT: CH Temp: 44.3 I (10739) OT: Slave OT Version: 0.0 I (11009) OT: Slave Version: C07FA308 I (11279) OT: Slave OT Version: 3.0 I (11279) OT: Free heap size after: 293684 I (11279) OT: ====== OPENTHERM ===== ``` ## Troubleshooting For any technical queries, please open an [issue](https://github.com/sazanof/esp-idf-opentherm/issues) on GitHub. We will get back to you soon.