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Green rectangular circuit board with six black relay cubes, screw terminals, USB-C port and 40-pin header

Belva Products

Belva Products Industrial 6-Channel ESP32-S3 WiFi Relay Module

SKU CH-FK3M-B6A87

Six-channel relay board driven by an ESP32-S3 dual-core processor at 240 MHz with 2.4 GHz wireless, isolated RS485, and a 40-pin Pico HAT header for RTC, CAN, RS232 or LoRa expansion.

  • Industrial-grade control with six relay channels
  • Dual-core 240 MHz processor handles complex tasks
  • 4 GHz Wi-Fi plus Bluetooth LE connectivity
  • Isolated RS485 and 40-pin Pico HAT expansion
  • Wide 7–36 V power input via screw terminal

Six-channel ESP32-S3 relay module for industrial

This new module provides six relay channels controlled by an ESP32-S3 microcontroller running at 240 MHz. It targets engineers and system integrators building remote switching or monitoring systems. The board combines wireless and wired control in a single unit.

Onboard isolated RS485 interface for Modbus networks

The isolated RS485 port connects directly to industrial Modbus sensors or modules without extra hardware. Dual-mode 2.4 GHz wireless adds Wi-Fi and Bluetooth LE for remote operation. A 40-pin header accepts compatible Raspberry Pi Pico HATs to add functions such as RTC, CAN, RS232 or LoRa.

USB-C for power and firmware.

Power the board via USB-C or the screw terminal that accepts 7 to 36 V input for industrial supplies. The header matches specific Pico HAT pinouts, so verify compatibility before purchasing. Builders needing more than six channels or a different wireless band should look elsewhere.

Highlights

  • Industrial-grade control with six relay channels
  • Dual-core 240 MHz processor handles complex tasks
  • 4 GHz Wi-Fi plus Bluetooth LE connectivity
  • Isolated RS485 and 40-pin Pico HAT expansion
  • Wide 7–36 V power input via screw terminal

Specifications

No published specifications for this item yet.

Questions about this item

How fast does the ESP32-S3 processor run inside the module?

The dual-core Xtensa LX7 runs at 240 MHz, so logic, networking and relay timing all execute at that clock speed.

What does the onboard RS485 interface actually connect to in practice?

It links the module to Modbus industrial devices or sensors over a two-wire bus with optocoupler isolation.

What voltage range can I feed into the screw terminals for power?

The wide-input supply accepts 7 to 36 V DC, making it suitable for typical industrial rail voltages.

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