RS485 communiciiton via USB-RS485 convertor

[pincpanter]

Why you don't want to use two adapters? It would save you a few headaches.

Is re-cabling too difficult?

[TinoMK]

Hi Paolo,

Because I am only testing with 2 devices. In reality it will be around 10 or more.

[JensG69]

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@TinoMK wrote:

Thank you Jens and Paolo,

Do you have any suggestion for a simple RS485 protocol? I need just proper addressing of the slaves. Each device will respond with dynamic data once being called.

Thanks again,

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This depends very much on the data that your device is sending. Some ideas (not complete):

Option 1: you do not send any binary data (ie only human readable characters). That can be achieved by sending binary data as HEX-Code also that then needs twice as much bytes to send. But then you can use a termination char like linefeed or carriage return to mark the end of a message.

Option 2: have a look at existing protocols that are used on RS485 devices and use one of these if applicable. Modbus RTU is one that comes to my mind.

Option 3: ???

Regards, Jens