ESP Solar Boy

This project provides a firmware for the ESP8266 microcontroller to intelligently control relays based on excess solar power availability. It integrates with Huawei SUN2000 inverters via Modbus-TCP to detect surplus energy and trigger connected loads accordingly. All settings are configurable via a simple HTTP interface, making it easy to set up and adjust without flashing new firmware.

Features

• Relay control
• HTTP configuration
• Real-time monitoring via web-user-interface
• Huawei SUN2000 support via Modbus-TCP

Setup

Prerequisites

• PlatformIO
• ESP8266 board

1. Clone the repository

git clone https://github.com/gsilvan/esp-solar-boy.git
cd esp-solar-boy

2. Build the project

pio run

3. Upload the firmware and the filesystem image

pio run -t upload
pio run -t uploadfs

4. WiFi settings

• Connect to esp-solar-boy
• Connect the device to your home WiFi
• Save and reboot

5. ESP Solar Boy configuration

• Navigate to http://solarboy.local via mDNS or use the assigned IP-Address
• Connect your relays to D0, D1, D2
• Configure settings and relay-pins via web-ui

License

MIT