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Arduino master/slave communication using RS485 and Modbus protocol - Networking, Protocols, and Devices - Arduino Forum
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Simulation Modbus RTU Slave and Master with 2 Arduino Nano in Proteus # arduino : PDAControl - YouTube
GitHub - ethicstechOSS/Modbus-Slave: A library that allows your Arduino or MSP to communicate via Modbus protocol, acting as a slave. Supports serial (RS-232, RS-485), LoRa RN-2483 and IP via Ethernet (Modbus IP).
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