This document describes the OpenVario serial port protocol.

Version: 1.2-dev

The OpenVario serial port protocol is built around the $POV NMEA sentence:

$POV,<type>,<value>,<type>,<value>,...*<checksum>

A $POV sentence can contain multiple datapoints that are defined by type and value. The type part is a letter or number describing the type of the following value according to the following overview of supported types. The value part is a floating point number for all currently supported types of datapoints. Future versions of the protocol may support other value types too though.

The list of datapoints should be terminated with the usual asterisk and two character checksum.

The following section describes all datapoints supported by the current version of the OpenVario protocol.

• S: true airspeed in km/h
  Example: $POV,S,123.45*05

• H: relative humidity in percent Example: $POV,H,58.42*24

• P: static pressure in hPa
  Example: $POV,P,1018.35*39

• Q: dynamic pressure in Pa
  Example: $POV,Q,23.3*04

• R: total pressure in hPa
  Example: $POV,R,1025.17*35

• T: temperature in °C
  Example: $POV,T,23.52*35

• E: TE vario in m/s
  Example: $POV,E,2.15*14