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Modbus TCP and RTU with Raspberry Pi PLCs: Python and Node-RED examples
A practical guide to implementing Modbus RTU and TCP on Raspberry Pi PLCs using Python (pymodbus 3.x) and Node-RED — with working examples for both single and dual-device setups.
Modbus is a master-slave communication protocol used worldwide in industrial automation. It runs over two transports: serial lines (Modbus RTU, via RS-485) and Ethernet (Modbus TCP). Both are supporte...











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