The Sunshine sensor does not capture the GPS signal


I’m working with a Phantom 4 Pro, and a Sequoia Parrot. We adapt the sensor through a 3D printer design, and an external power supply of 5v and 2.4 A, as indicated in the manual. But we have a problem: GPS does not capture satellite signal.

We did several tests, in room, on the field, and we got the signal only twice. In one of them, we made the flight, but the signal lost, and in the processing was a “hole”.

We try to force the calibration and everything else, but without success, the light indicated on the sunshine sensor is yellow.

Can somente helo me?