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I'm trying to connect sesnor that use RS485 (I'm almost sure that's modbus). The sensor has RX/TX and +/- wires. Do I still need a component between the RX/TX pin from the Arduino UNO and the sensor itself? All the libraries I reviewed have an additional control pin. Or do I need, for example, a MAX485? Is it possible to simply connect RX of sensor to RX of UNO, TX of sensor to TX of UNO and + to 5V of UNO, and - to - ?

asked May 13, 2023 at 9:17
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