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Waveshare Industrial 6-Channel ESP32-S3 WiFi Relay Module, Supports WiFi/Bluetooth/RS485 Control, Onboard RS485 / Pico HAT Interfaces, with Multiple Isolation Protection Circuits

DC 5V 3 Channel Relay Module Relay Expansion Board with Optocoupler Insulation Compatible 3.3V 5V Signal for Arduino

LM YN 4-Channel Solid State Relay Module High Low Level Trigger 3A Optocoupler Isolation

Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay Module, Isolated CAN Interface, Xtensa 32-bit LX7 Dual-core Processor, 240MHz, Multiple Isolation Protection Circuits, PoE Ethernet Port

Industrial ESP32-S3 6-Channel WiFi Relay Module, Supports W-iF-i/Blue-Too-th / RS485 Remote Control/Pico HAT, Built-in Power Isolation and Optocoupler Isolation Protection, with Rail-Mount Case

DIANN 30A 4 Channel Relay Module 12V Relay Module Expansion Board High Low Level Trigger with with Optocoupler Isolation for PLC Automation Equipment Control Industrial Control

MiOYOOW ESP32-C3 Single-Channel Fidelity Relay Switch Development Board ESP-C3-12F Remote Switch Control Module Supporting AC 90V-250V & DC 7V-12V Power Supply 4M Byte Flash

ACEIRMC 12V 16-Channel Relay Interface Board Module Optocoupler LED LM2576 Power for Arduino DIY Kit PiC ARM AVR