# OpenDTU

## Background
This project was started from [this](https://www.mikrocontroller.net/topic/525778) discussion (Mikrocontroller.net).
It was the goal to replace the original Hoymiles DTU (Telemetry Gateway) with their cloud access. With a lot of reverse engineering the Hoymiles protocol was decrypted and analyzed.


## Features for end users
* Uses ESP32 mikrocontroller and NRF24L01+
* Multi-Inverter support
* MQTT support
* Nice and fancy WebApp with visualisation of current data

## Features for developers
* The mikrocontroller part
    * Build with Arduino PlatformIO Framework for the ESP32
    * Uses [ESPAsyncWebserver](https://github.com/me-no-dev/ESPAsyncWebServer) and [Async MQTT client](https://github.com/marvinroger/async-mqtt-client)

* The WebApp part
    * Build with [Vue.js](https://vuejs.org)

## Building
* Building the WebApp
    * The WebApp can be build using yarn
    ```
    $ yarn install
    $ yarn build
    ```
    * The updated output is placed in the 'data' directory

* Building the mikrocontroller firmware
    * Visual Studio Code with the PlatformIO Extension is required for building