How far is the Deviation protocol code from 4.0.1-nightly-build (e.g devo10-v4.0.1-fcd0669) and release 5.0.0 or Indigos latest DSM test build with regard to altimeter and/or vario? Doesn't Devo already support different sounds?
Is at least displaying altitude as AGL above ground level working?
Optional: Is it possible to display / calculate the distance from start position with a GPS sensor (Spektrum GPS is more expensive) within telemetry screen and supported by DSM protocol code?