BIG problem in labview interface for arduino (sometimes)

[betterthanyou]

Hello my friends;

somtimes when i use arduino to control Servo with labview i find that PORT COM is Unknown when i Run my programme VI why !??? this problem all my friend told me that are the same problem ?

HOW I CAN SOLVE THIS BIG PROBLEM for to contunie my projects??????????

[Kristoff2]

What exactly do you mean by 'PORT COM is Unknown'?

The screenshot shows some serial device (maybe an arduino) with COM20 and what looks like a parallel port with some problem.

Are you using Windows?

If so does the Arduino show up in device manager?

Are you explicilty setting the COM port for LIFA on the Arduino Init or letting it auto detect?  I would reocmmend using a VISA resource constant or control to selelct the correct COM port.

Thanks!

-Sam K

LIFA Developer

[betterthanyou]

i mean  with port com ; COM 20 when i connect arduino with pc ,arduino is known now but when i USE vi for controling my servo

yes i use WINDOWS 7 AND  the Arduino show up in device manager

the com 20 is unknown when i run my programe of servo motor i don'T know why this the problem of LIFA is in communication sometimes he stop communication and i want to solve my this problem because when i run programme  the port is unknown the first solution is to restart my pc and lose the time????!!!!!!!!!!

Ce message a été modifié par: betterthanyou

[Kristoff2]

I'm still not certain what you mean by unknown. 

Can you take a screen shot of the Arduino when it is 'unknown'?

By unknown do you mean it no longer shows up in device manager?

How are you powering your servos?  Directly from the Arduino?  If so which pin? If not are you using a separate power supply?

You may be drawing too much power from the Arduino and causing it to brown out which could cause it to disappear from device manager and break the connection to LabVIEW.

Please provide as much detail as possible so we can help you get this solved.

Thanks!

-Sam K