Hi,
I try to communicate with a balance by serial communication RS232.
I send a command "S\r\n" to get the current weight.
It is working properly from my hyperterminal or from a Python script but I can't make it work from Node-red.
I tried to have a Serial input node with "S" as payload and include \r\n in as additional characters for output messages in the serial com parameters ; or include them directly in the payload. But I don't have any answer from the balance.
The serial configuration is well configured because if I choose the continuous mode on my balance I receive data each second.
If you have any ideas to help I'm happy to hear them 
Thanks,
Charlotte
Hi,
how are you adding the \r\n ? Most devices only need one or other of them... (often \r) - the serial node can add it for you which is probably the way to go.
Yes I did it with the Serial node, and also in the payload.
I tried \r, \n and \r\n but none of them are working.
if in the payload - presumably a function like
msg.payload += "\r\n";
return msg;
This is working with input / output nodes, thanks a lot !
Do you know why it's not working when I use the "add character to output messages" ?
can you share a screenshot of how you have it configured ?
(not explanation off top of my head - unless it's - you can only specify one char in there, so \r or \n , not both.)
