433mhz. Telemetry

The telemetry 433mhz Air has no lights on it we have used 2 units and both have failed. What are we doing wrong… V2.1 Dropix … Also I have lost the signal from the Airspeed sensor.

If there is a problem on telemetry modules, please open a ticket here and we will exchange them.

Regarding the airspeed sensor, what else is connected to your I2C bus?