I get the following response:
dialout:x:20:root
I am logged in as root
If the loopback test worked, assuming that this was using node-red, then it can't be that sort of issue.
@AlastairLong, when you said
Was that using node red to transmit and receive the data?
Is Node Red running as root?
Yes Node-Red is also running as root
You haven't answered my question about your loopback test.
Apologies, i did run a loopback test and it worked.
Was the loopback test in node red?
Yes, the loopback test was in Node-Red
In that case you know that node red is able to send and receive ok.
Presumably, when you removed the link between the pins, you were no longer able to see the message you sent.
Yes that is correct, I think I am either not sending the correct command to the NOLEK S9 unit or the RS232 connection is not enabled on the S9 unit.
Apparently using ASCI Protocol if !STATUS* is sent to the device it should respond so i am sure the node red side is setup correctly but not the rest.
You might need a Carriage Return \r - !STATUS*\r
Thanks,
I have already tried that \r and \n and \r\n with no luck.
When i change communication to RS485 I get a response but with no data it is just ""
You could try a cheap USB to RS485 adapter.
Have you found the Serial port settings on the S9?
