Modular Smart Home Automation System with Local Logic
Compatible with ESPHome and Home Assistant.
Works without internet or cloud
- Local logic on every module (fail-safe)
- Reliable wired communication between devices
System architecture
Unlike cloud-based systems, each module runs its own logic, ensuring that lighting, heating, and security continue working even if the controller or network is unavailable.
Deterministic Communication
RS-485 Modbus ensures stable, interference-resistant communication across all modules, even in electrically noisy environments.
Modular & Scalable
Local Logic (Fail-Safe)
Fully Local Operation
Our Products
Smart Home Controllers
MiniPLC
DIN-rail controller with 6 relays, I/O, temperature sensing, and display. Integrated AC/DC supply and RS-485 Modbus expansion.
MicroPLC
Minimal DIN-rail controller built for modular automation. Controls RS-485 modules, reduces cost, and scales as needed.
Smart Home Modules for Lighting, Heating, Security, and Energy
Opentherm Gateway
Opentherm
Energy & Monitoring
Lighting & Dimming
Control & I/O
Safety & Detection
Smart Home Automation Guides & System Design
Explore system architecture, device configuration, and fail-safe design principles.
ESPHome Smart Home Devices
Configure sensors, relays, and automation logic using simple YAML-based firmware.
EU Compliance & Standards
Behind the scenes of HomeMaster's regulatory journey — EMC, LVD and RED conformity assessment, electrical-safety testing, and EU Declarations of Conformity for every module in the lineup.
Home Assistant Automation
Discover automation logic, device integration, dashboards, and local control without cloud dependency.
Smart Home Heating
Smart heating control for homes — OpenTherm boilers, and energy optimization. Local first heating control without cloud dependency, designed for reliability through any season.
About HomeMaster
European industrial automation company with 17+ years of experience.
Founded in Romania, we design and build reliable automation systems inspired by industrial standards — but adapted for modern smart homes and buildings.
Why can’t smart homes be as reliable as industrial systems — and as open as maker platforms?
HomeMaster combines both approaches:
industrial-grade reliability with open, developer-friendly technology.
We design and build every product in-house, focusing on:
- Deterministic and reliable operation (RS-485 wired communication)
- Fully local automation (no cloud dependency)
- Developer-friendly integration (ESPHome & Home Assistant)
- Full transparency (open schematics and firmware)
- Zero vendor lock-in
Our systems are built to be stable, maintainable, and scalable — from small installations to complex automation projects.
Open Source & Documentation
All hardware and firmware are publicly available:
- GitHub repository (firmware, schematics, examples)
- ESPHome configurations (ready-to-use YAML)
- Modbus documentation and module configuration
- Integration examples for Home Assistant
Partnership
Add HOMEMASTER to your offer as:
Certified Installer
Join the HomeMaster Installer Network and grow your business with cutting-edge smart automation solutions. Whether you’re an experienced integrator or a professional starting in smart systems, our platform gives you the tools, support, and products to build intelligent, reliable, and scalable automation for your clients.
Discover more
Reseller Partner
Partner with HOMEMASTER and bring high-quality, ESP-based smart automation solutions to your market. Whether you're an online retailer, smart home showroom, or distribution company, we're looking for partners who are passionate about innovation and committed to delivering reliable smart technologies.
Discover more