Arduino UNO + Modbus Device with MAX485 converter

Projects General Guidance
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Hello Everybody,

I was searching everywhere for a simple solution to interface the UNO with any Modbus device. Finally, I ended up here. :slight_smile:
Kindly check, if the attached wiring diagram is appropriate? For example, is the +5V from UNO to MAX485 Modbus side required?

Thank You very much for Your help and support in advance.

Arduino_Modbus circuit
Arduino_Modbus circuit1927×816 212 KB

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have a look at Modbus (RS485) using Arduino

I also find using a USB-RS485 dongle for a PC helps with debugging RS485 communications

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