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DC9-24V ESP32 Modbus RTU Four Channel Relay Module RS485 Development Board MODBUS Protocol Optocoupler Isolation Relay Board

Product no longer available. The stores we track no longer sell it; last price seen $7.15.

Price history: 2 daily prices tracked since 2026-10-19; lowest $7.15, highest $7.15.

DC9-24V ESP32 Modbus RTU Four Channel Relay Module RS485 Development Board MODBUS Protocol Optocoupler Isolation Relay Board

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