Question

Hello,

I use a RUT955 to retrieve data from a sensor in RS485. I use the serial type modbus gateway. At some moments, I can't interrogate the sensor anymore. I connected to the RUT in ssh, and I typed the logread command. But is there a command to retrieve only RS485 logs ?

Thank you in advance.

Answer 1

Hi,

Unfortunately, to retrieve only RS485 part of the logs you would need to use a pipe after logread.

So for example:

logread | grep RS485

This will fetch only strings that contain "RS485" in them.

EB.

Comments

Thank you for your prompt feedback. I'm surprised because I don't have any log with logread | grep RS485. Do you know how to recover MODBUS/RS485 logs ?

Thanks

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Internally no - I believe the best way to see anything with serial port communication would be having some kind of monitoring or analyzing software running in the background.

EB.

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ok, thanks. Do you know some software for doing this ?

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Anything works as long as they have packet analyzing features, so let's say this: https://www.eltima.com/rs485-sniffer.html (we're not responsible for this software, so don't take it for granted).

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ok, is it possible to install something on the RUT955 ?