I will post my solution here. The dashboard already communicate with the cRIO. It gets data about the digital and analog inputs, relays and battery voltage. The dashboard is sending joystick data too. And the port that it uses is unblocked for sure.
There is a labview dashboard project that I can edit to send data of image processing. And in labview I can use dll functions as vi's. I created a dll with the square detection and others functions. I called this functions in labview dashboard and it send the data to cRIO.
