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also known as ANSI/TIA/EIA-485, TIA/EIA-485, EIA-485 or RS-485, is a standard defining the electrical characteristics of drivers and receivers for use in balanced digital multipoint systems. The standard is published by the Telecommunications Industry Association/Electronic Industries Alliance (TIA/EIA).

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I have two mega arduino and want to them communicate with modbus rtu together, i use below link circuit for this : http://www.microcontroller-project.com/rs485-communication-between-arduino-mega-and … -arduino-pro-mini.html but dont work!! while they work in simple rs485 and without modbus with same above link code !? my code in modbus mode is based on this forum : https://forum.arduino.cc …
asked May 5 '16 by mohammad2050