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ESP32 Relay Switch BLE4.2+WIFI+RS485+LAN multi-communication interface 4 channels from China manufacturer - ENGELEC ELECTRIC TECHNOLOGY CO., LTD
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GitHub - Erriez/R421A08-rs485-8ch-relay-board: Python 8 Channel RS485 MODBUS RTU relay board type R421A08
LC Technology RS485/TTL 2 Channel Relay Module (Modbus-compatible) – Flux Workshop
MOD-16RO - RS485 Modbus 16 Relay Output RTU - www.audon.co.uk
12V 10A RS485 16 Channel Relay PLC Expansion Board for Modbus(R4D3B16-R with DIN rail box) : Amazon.co.uk: Business, Industry & Science
16ch DC 12V RS-485 Modbus RTU Relay Board RS485 Bus Remote Control S – Many Favours
