Various tools, examples, and documentation for communicating with Hoymiles microinverters
See the code
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
This repository provides hardware and software solutions for communicating with Hoymiles inverters via radio. Our system allows you to easily obtain real-time values, such as power, current, and daily energy, as well as set parameters like the power limit of your inverter to achieve zero export. You can access these functionalities through our user-friendly web interface, MQTT, or JSON. Our solutions simplify the process of monitoring and fine-tuning your solar panel system to help you achieve your goals.
Table of approaches:
| Board | MI | HM | HMS/HMT | comment | HowTo start |
|---|---|---|---|---|---|
| ESP32, C++ | ✔️ | ✔️ | ✔️ | create your own DTU | |
| ESP8266, C++ | ✔️ | ✔️ | ❌ | ⚠️ not recommended for new DTU |
⚠️ Warning: HMS-XXXXW-2T WiFi inverters are not supported. They have a 'W' in their name and a DTU serial number on its sticker
Firmware Archive https://fw.ahoydtu.de
If you encounter any problems, use the issue tracker on Github. Provide a detailed description of the issue and consider if it is related to our software. This will help us provide effective solutions.
Contributors are always welcome!
179 followers · starred Oct 2022
663 followers · starred Mar 2023
47 followers · starred Jul 2025
222 followers · starred Feb 2023
Various tools, examples, and documentation for communicating with Hoymiles microinverters
See the code
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
This repository provides hardware and software solutions for communicating with Hoymiles inverters via radio. Our system allows you to easily obtain real-time values, such as power, current, and daily energy, as well as set parameters like the power limit of your inverter to achieve zero export. You can access these functionalities through our user-friendly web interface, MQTT, or JSON. Our solutions simplify the process of monitoring and fine-tuning your solar panel system to help you achieve your goals.
Table of approaches:
| Board | MI | HM | HMS/HMT | comment | HowTo start |
|---|---|---|---|---|---|
| ESP32, C++ | ✔️ | ✔️ | ✔️ | create your own DTU | |
| ESP8266, C++ | ✔️ | ✔️ | ❌ | ⚠️ not recommended for new DTU |
⚠️ Warning: HMS-XXXXW-2T WiFi inverters are not supported. They have a 'W' in their name and a DTU serial number on its sticker
Firmware Archive https://fw.ahoydtu.de
If you encounter any problems, use the issue tracker on Github. Provide a detailed description of the issue and consider if it is related to our software. This will help us provide effective solutions.
Contributors are always welcome!
179 followers · starred Oct 2022
663 followers · starred Mar 2023
47 followers · starred Jul 2025
222 followers · starred Feb 2023
