Smart Home Modules for ESPHome & Home Assistant

Compact ESP32-based DIN-rail automation controller with RS-485 Modbus RTU master, 1 relay output, 1 isolated 24V digital input, dual 1-Wire bus for DS18B20 temperature sensors, USB-C, on-board RTC and external Wi-Fi antenna. Ships pre-flashed with ESPHome for instant integration with Home Assistant. Ideal for fireplace and heating automation, energy metering, and DIY industrial control.

Industrial-grade DIN-rail ESP32 PLC for smart home and professional automation. Combines onboard digital, analog, relay and temperature I/O with Wi-Fi, Ethernet and RS-485 Modbus RTU master/slave. Ships with ESPHome pre-installed for instant Home Assistant integration. Supports YAML packages for HomeMaster expansion modules (DIO, AIO, WLD, ENM, RGB) and works as the central controller in fireplace, HVAC, lighting and energy monitoring projects.

DIN-rail expansion module with 3 × 16A relay outputs (NO/NC), 4 isolated 24V digital inputs, RS-485 Modbus RTU slave, and 3 user buttons + LEDs on the front panel. Configurable via WebConfig over USB-C. Each input can be wired to a wall switch, motion sensor or door contact and used as a Home Assistant binary_sensor. Ideal for controlling pumps, gas boilers, valves, and high-current loads through a HomeMaster MicroPLC or MiniPLC.

Smart stair lighting controller for up to 32 steps with Modbus integration. Drives RGB or single-color LEDs with progressive on/off lighting per step, ambient light sensor, and dual motion-sensor input (top and bottom of stairs). RS-485 Modbus RTU slave, ESPHome firmware, configurable via WebConfig over USB-C. Designed for residential staircase lighting that activates only when someone is walking up or down.

Modbus RGBCCT LED controller for 12-24V LED strips. Five MOSFET PWM channels (RGB + warm/cool white) with smooth dimming, 4 digital inputs for wall buttons, RS-485 Modbus RTU slave, and ESPHome firmware. Configure via WebConfig over USB-C, integrate with Home Assistant in seconds. Suitable for ambient lighting, RGBCCT strips in living rooms, kitchen under-cabinet, and decorative installations.

DIN-rail ESPHome OpenTherm gateway connecting OpenTherm-compatible boilers to Home Assistant. Provides full bi-directional control of setpoint, modulation level, DHW temperature, hot water demand and reads boiler diagnostics (flame, fault codes, return temp, modulation). Ships with ESPHome pre-installed. Integrates with Home Assistant climate entity for smart heating control with hybrid sources like wood fireplaces, solar collectors, and gas boilers.

17-zone Modbus alarm module on DIN-rail. Connects up to 17 dry-contact sensors (door, window, PIR motion, glass-break, water leak) with individual zone status reporting via RS-485 Modbus RTU. Integrated buzzer output, programmable zone debouncing, and 24V isolated inputs. Pairs with HomeMaster MicroPLC or MiniPLC and Home Assistant for whole-house intrusion detection, occupancy monitoring, and automation triggers.

3-phase energy metering DIN-rail module with two CT clamp inputs and one pulse-counting input. Measures voltage, current, active and reactive power, energy consumption per phase, power factor, and frequency. RS-485 Modbus RTU slave, ESPHome firmware, configurable via WebConfig over USB-C. Ideal for whole-house energy monitoring, solar PV generation tracking, EV charging measurement, and integration with Home Assistant Energy Dashboard.

Analog I/O expansion module with 4 isolated analog inputs (0-10V or 4-20mA configurable), 2 analog outputs (0-10V), and RTD support for PT100/PT1000 temperature probes. RS-485 Modbus RTU slave, RJ45 sensor connectors, ESPHome firmware, configurable via WebConfig over USB-C. Ideal for industrial-grade sensor integration, HVAC monitoring, water tank level, soil moisture, and process control with Home Assistant.

Water leak detection and flow metering module with 5 dry-contact leak sensor inputs (kitchen, bathroom, washing machine, boiler room, basement), 2 pulse flow meter inputs with built-in heat-meter calculator (pulses per litre, supply and return DS18B20 temperatures, kWh accumulator), and 1-Wire bus for additional sensors. RS-485 Modbus RTU slave, ESPHome firmware, configurable via WebConfig. Pairs with valves and HomeMaster MicroPLC for full smart-home water protection and heat monitoring.

Modbus AC dimmer module for incandescent, halogen, and dimmable LED bulbs. Two independent MOSFET channels with leading-edge phase-cut dimming, 4 digital inputs for physical wall buttons (long-press toggle, short-press dim), zero-crossing detection for flicker-free output. RS-485 Modbus RTU slave, ESPHome firmware. Configurable via WebConfig over USB-C. Pairs with HomeMaster MicroPLC and Home Assistant for smooth, smart lighting control of legacy AC fixtures.