Using I2C to communicate with arduino in LabVIEW.

[RoboNerd01]

I have been trying to use the WPI I2C library to communicate with my arduino mega 2560 for a LCD display for a while now... But the problem is that LabVIEW tries to verify that the "sensor" is there and wont send ANYTHING to it until it receives a response from the "sensor". Has anyone ever used I2C for anything close to this, or at all? Or is there a better and easier way to do communications? I searched everywhere but could not find ANYTHING on this.

And I'm curious if it is legal to use an Ethernet shield of our robot.

Thanks.

[gvbravo]

Two things to consider. Are you using a 7 bit or 8 bit address and do you have the arduino board set up as a slave?

If you have an oscilloscope that would help too.

[jman4747]

I've tried...

http://www.chiefdelphi.com/forums/showthread.php?t=120173 You could try post #4 from this thread.


Best bet is to use the serial port, it has proven to be better for me. I suspect this is because I2C is so heavily geared towards reading sensors while the serial VI's were made more for general 2 way communication use. I would look into sending things in strings to the arduino storing them then sending them to the display from the arduino.

[steinra]

An Ethernet shield would work as well for communications. But I am interested in seeing what you find out on I2C as well. We were looking at possibly using this as well as a communications method.

Randy