add multiple TermChar properties in property node

[James_R]

Hello all

I am communicating to a device via RS232 and most of the responses are terminated with  a <CRLF>.  but some of the commands are not terminated.  Can i use multiple termination char properties in the property node ?

[JeanPierre]

Usually, I set the termination settings before reading each command. If the command is terminated with <CRLF> then set the termchar to <LF> before reading the reply. Make a Read VI that will set or not  the termchar according to a boolean input.

Message Edité par Jean-Pierre Drolet le 07-19-2005 08:44 PM

[James_R]

there is a <*> heartbeat command that is not terminated that is broadcast every second.  i want to ignore these heartbeats when expecting a response from other commands.  and there are other commands that are not terminated.  I can use your example for the other commands but what about the <*> ??

thanks

[JeanPierre]

Tell the guy who programmed the device that it is evil to make comm protocol exceedingly difficult to parse.
Communication with a device should be client driven e.g. the device replies only when asked to by the client. If the client wants a heartbeat, it asks a heartbeat every second. period. </rant>

After each command sent, read the received characters and parse according to what response formats are expected. Remove heartbeats from the reply and retry if needed. If you can give few typical strings received from the device, I could be more specific in my answer.