ESP32-S3 Single-Relay DIN-Rail Module

Build a compact relay-control project that can also communicate with RS485 equipment. This ESP32-S3 one-channel module combines Wi-Fi, Bluetooth, an isolated RS485 interface and an RTC in a DIN-rail enclosure for your own automation application.

✅ Switch a connected circuit - One normally open relay channel provides an output for your control logic.

✅ Bring RS485 devices into the project - The isolated interface supports connections to compatible Modbus equipment or sensors.

✅ Develop timed actions - An onboard RTC provides a timekeeping component for scheduled application behaviour.

✅ Fit the controller into a cabinet - The DIN-rail enclosure gives the assembly a defined mounting format.

Put Switching and Communication in One Control Point

A small automation project may need both an output and information from another device. Combining the relay and RS485 interface lets you develop that logic around one controller instead of arranging separate boards for each function.

Use the Type-C connection for development and the documented interfaces for the final installation. This is a programmable module rather than a preconfigured home-automation app; firmware, load suitability and cabinet wiring form part of the project.

Technical details

• Platform: ESP32-S3
• Relay: one normally open channel
• Supply: 5 V
• Wireless: 2.4 GHz Wi-Fi and Bluetooth 5 LE
• Interfaces: isolated RS485 and USB Type-C
• Enclosure size: approximately 91.6 × 23.3 × 58.7 mm
• Options: Type A or Type B; antenna accessories differ

Build your next cabinet-control project around a single relay-and-RS485 development module.