Welcome to the official GitHub repository for HOMEMASTER – a suite of open-source, industrial-grade smart automation controllers with a modular family of I/O expansion modules. This repository includes schematics, firmware and manuals for:
- ✅ MiniPLC & MicroPLC controllers
- ✅ OpenTherm Gateway
- ✅ A full range of extension modules
A compact, DIN-rail mountable programmable logic controller featuring:
- 6 relay outputs
- Isolated digital inputs (24V with ISO1212 support)
- Analog I/O (ADS1115 / MCP4725)
- RTD (MAX31865) temperature input
- RS-485 with Modbus
- MicroSD logging
- OLED display, RTC, buzzer
- ESP32-WROOM-32U core
- ESPHome/Home Assistant ready
A smaller, more affordable controller for basic automation tasks:
- Relay output
- 1-wire
- RS-485 with Modbus
- RTC
- ESP32-WROOM-32U core
- ESPHome/Home Assistant ready
A communication bridge between ESP-based systems and OpenTherm-compatible boilers:
- ESP32 with OpenTherm protocol
- Home Assistant integration via ESPHome
- Useful for custom heating control setups
| Module Code | Name / Function |
|---|---|
| AIO-422-R1 | Analog I/O Module with 2 RTD, 4 analog inputs (0–10V), 2 analog outputs (0–10V) |
| ALM-173-R1 | Alarm Input & Relay Output Module with 17 alarm inputs, 3 relay outputs |
| DIM-420-R1 | 2-Channel Dimmer Module with 4 digital inputs – ideal for smart lighting |
| DIO-430-R1 | General-purpose Digital 4 Input 3 Relay Output Module |
| ENM-223-R1 | 3-Phase Energy Monitor with 2 relays |
| RGB-620-R1 | RGB Lighting Control Module – 6 MOSFET LED channels, 2 DI, Modbus |
| STR-3221-R1 | Stair LED Controller – 32 LED outputs, 2 presence sensors, 1 switch input |
| WLD-521-R1 | Water Leak Detector & Valve Controller – 5 leak/pulse inputs, 2 relays, 1-Wire bus |
/schematics/ → PDF project files for all products
/firmware/ → ESPHome YAMLs & MicroPython for RP2350A extension modules
/manuals/ → PDF setup and wiring guides
/resources/ → Logos, icons, branding, and images
- 🌐 Website: www.home-master.eu
- 📧 Email: contact@home-master.eu
All hardware design files and documentation are licensed under CERN-OHL-W 2.0.
Firmware and code samples are released under the GNU General Public License v3 (GPLv3) unless otherwise noted.
🔧 HOMEMASTER – Modular control. Custom logic.