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Green circuit board with six black relay cubes inside a grey DIN-rail enclosure

Barrow Mods

Barrow Mods Industrial ESP32-S3 6-Ch WiFi Relay 2 in 1 accessory

SKU CH-ZA78-VMYJG

Six-channel Wi-Fi and Bluetooth relay module with 10 A contacts, RS-485 and Pico HAT expansion, powered from 7–36 V

  • ESP32-S3 dual-core processor at 240 MHz enables AIoT edge computing
  • 4 GHz Wi-Fi and Bluetooth LE provide dual-mode wireless control
  • Six relays rated 10 A at 250 VAC or 30 VDC switch mains appliances
  • Isolated RS485 interface connects Modbus sensors and industrial modules
  • 7–36 V wide-range input with screw terminals suits industrial power rails

Industrial ESP32-S3 Relay Module

This industrial 6-channel WiFi relay module is built around an ESP32-S3 processor with a 32-bit LX7 dual-core running at 240 MHz. It targets AIoT projects that need remote switching of mains or low-voltage loads. Integrated 2.4 GHz Wi-Fi and Bluetooth LE provide wireless control, while an isolated RS485 interface supports Modbus connectivity. The board ships in a rail-mount case for DIN-rail installation.

Installation notes and common issues

Power is supplied through a screw terminal accepting 7 to 36 V, and a USB Type-C port handles firmware flashing and debugging. The six relays are rated at 10 A for 250 VAC or 30 VDC loads. Optocoupler and digital isolation protect the logic side from high-voltage transients. A 40-pin header accepts Raspberry Pi Pico HATs for added functions such as RTC, CAN or LoRa. Wiring mistakes on the high-voltage terminals are the most frequent cause of damage.

Suitability and alternatives

The module suits engineers building industrial automation, smart-home or remote-monitoring systems that require six independently switched channels with both wireless and wired Modbus control. Buyers who need more than six relay channels or a different wireless protocol should look at other devices. Projects that cannot accommodate a DIN-rail enclosure or that require a narrower input voltage range will also need a different solution.

Highlights

  • ESP32-S3 dual-core processor at 240 MHz enables AIoT edge computing
  • 4 GHz Wi-Fi and Bluetooth LE provide dual-mode wireless control
  • Six relays rated 10 A at 250 VAC or 30 VDC switch mains appliances
  • Isolated RS485 interface connects Modbus sensors and industrial modules
  • 7–36 V wide-range input with screw terminals suits industrial power rails

Specifications

No published specifications for this item yet.

Questions about this item

How do I confirm the ESP32-S3 module is operating correctly after wiring the 10A 250VAC relays?

Power the board via the 7-36V screw terminal or USB Type-C, then check the onboard status LEDs and log into the web interface over 2.4GHz Wi-Fi to verify each of the six relay channels toggles and reports state changes.

What comes in the box and what must I source separately for a RS485 Modbus deployment?

The module ships in a rail-mount case with the ESP32-S3 board, six relays, isolated RS485 port, 40-pin Pico HAT header and USB Type-C connector; you must supply 7-36V power wiring, RS485 bus cabling and any Pico HAT add-on boards.

Which power-input option should I choose between the screw terminal and the USB Type-C port?

Use the screw terminal for permanent 7-36V industrial supply; use USB Type-C only for bench firmware flashing, debugging or temporary low-power tests.

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