sentera ndvi, pixhawk orange

hello
i am struggling with the configuration of the sentera sensor in question on a hexacopter equipped with pixhawk orange. The sensor is configured according to the manual but although it switches on it does not take pictures.
We have made a lot of attempts but have not found a way to get the sensor and control unit calibrated correctly, probably the right gps message is not coming through. Has anyone struggled with the same issue?