Description

A compact ESP32-based relay controller designed for 24VAC control systems.
Ideal for HVAC zoning, irrigation valves, hydronic heating, ventilation dampers and general automation.

Powered directly from a 24VAC supply, the board converts the voltage to run the ESP32 and switches the same control voltage through onboard relays.

Perfect for DIY automation, Home Assistant integrations, and custom control projects.

Designed and shipped from Australia. International shipping available.

Key Features

• ESP32 Wi-Fi microcontroller
• Powered directly from 24VAC
• Onboard relay outputs for switching 24VAC loads
• Compact PCB design suitable for enclosure or wall installation
• Compatible with ESPHome, Arduino, or custom firmware
• Ideal for low-voltage control circuits
• Open integration with Home Assistant or other automation systems

Typical Applications

This controller can be used anywhere 24VAC control circuits are present.

Examples include:

• HVAC duct damper control
• multi-zone air conditioning systems
• hydronic heating valves
• irrigation valves and sprinkler systems
• ventilation dampers
• pump or fan control
• building automation projects
• laboratory automation
• agricultural systems

Example Use Cases

HVAC Zoning

Control duct dampers individually to create smart climate zones.

Irrigation Control

Switch multiple 24VAC irrigation valves using Wi-Fi automation.

Hydronic Heating

Manage zone valves in multi-room heating systems.

DIY Automation

Integrate low-voltage equipment into Home Assistant or other automation platforms.

Technical Overview

Power Input
24VAC

Controller
ESP32 Wi-Fi microcontroller

Outputs
Multiple relay outputs for switching 24VAC loads

Connectivity
Wi-Fi (ESP32)

Firmware
Compatible with ESPHome, Arduino, or custom firmware.