tcp ip no responsee

[bikekowal]

Hi all,

I want to develop a simple application which will be controlling a M^2 laser. The laser provides TCP server for commands from remote software, and I want to connect to this server from Labview. A code must connect as a TCP client to the server address on specific port. Once connected code should send one of two string based commands to the laser:

"WAVELENGTH xxxx" or "WAVE_STATUS".

The commands are case sensitive, if the command is not recognised by the laser the server will reply "unrecognised command". I've tried to use this simple VI:

but unfortunately I get no reponse from a device. All interface settings are proper because I used the laser with another software.

Does anyone have an idea where did I make a mistake? 

regards,

Marcin

[nathand · Accepted solution]

You need to wire a number of bytes to read into the TCP Read.  The default value is 0, so you won't read anything.

[bikekowal]

thats right, this was something I needed. Many thanks for a clue!

regards,

Marcin