Hello, I'm configuring my RFID readers system. I have 3 Arduinos (slaves), each of them has own RFID reader, and I would like to connect them via Modbus RS485 with my PLC driver Delta DVP 14SS2 (Master). PLC will contact each Arduino sequentially every second and use only 03 Modbus function to re…

Simple Modbus Slave RS485 Invalid CRC problem

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