This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

This Fork adds some information about building AhoyDTU with ESP32-S3-WROOM-1 and E49-900M20S

• Tested with version 0.8.112 from branch 'development03'
• Use environment 'opendtufusion' or 'opendtufusion-de'
• One can use the build in USB for flashing
  • The USB on the ESP32-S3 uses the GPIO20 for D+ and GPIO19 for D-. If you are flashing for the first time, you need to get the ESP32-S3 into the download mode manually.
  • To do so, press and hold the BOOT button and then press the RESET button once. After that release the BOOT button.
  • That is: Connect the BOOT pin with GND. Then connect EN pin with GND. Release EN pin and after that release the BOOT pin.

(My assembly)

Restart ESP32-S3 after flashing. The setup works as usual. In Settings disable nRF24L01+ and enable CMT2300A. The pin settings are

Signal	Pin
SCLK	GPIO12
SDIO	GPIO13 (MISO)
CSB	GPIO10 (CS)
FCSB	GPIO48
IRQ	GPIO21

We use SPI2 main interface (Group 5e) for fast SPI (FSPI) connection. See ESP32-S3 datasheet (p. 17).

🖐 Ahoy!

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.

Changelog

latest Release Development Version

Table of approaches:

Board	MI	HM	HMS/HMT	comment	HowTo start
ESP8266/ESP32, C++	✔️	✔️	✔️	👈 the most effort is spent here	create your own DTU
Arduino Nano, C++	❌	✔️	❌
Raspberry Pi, Python	❌	✔️	❌
Others, C/C++	❌	✔️	❌

⚠️ Warning: HMS-XXXXW-2T WiFi inverters are not supported. They have a 'W' in their name and a DTU serial number on its sticker

Getting Started

1. Guide how to start with a ESP module

2. ESP Webinstaller (Edge / Chrome Browser only)

3. Ahoy Configuration

Our Website

https://ahoydtu.de

Success Stories

• Getting the data into influxDB and visualize them in a Grafana Dashboard (thx @Carl)

Support, Feedback, Information and Discussion

• Discord Server (~ 7.300 Users)
• The root of development

Development

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!

Related Projects

• OpenDTU <- Our sister project ✨ for Hoymiles HM- and HMS-/HMT-series (for ESP32 only!)
• hms-mqtt-publisher <- a project which can handle WiFi inverters like HMS-XXXXW-2T