Script remembers up to 30 last altitude readings and uses the oldest and newest altitude to calculate ascend or descend rate in meters per minute. The result is an output value of the script. The value can also be played at any time.

The script if for OpenTX 2.0.x series. The only change needed for OpenTX 2.1.x is to change the line where the Altitude is read to the name of the actual altitude sensor (which defaults to "Alt").

Put the script in SCRPTS/MIXES directory and use it in CUSTOM SCRIPTS screen on the radio.

Input parameters:

• Play: plays current rate one time (use with a logical switch that is switched on every 30 seconds for example)
• Dur: how many altitude samples are stored/used. Use biger number for more smooth/precise but at the same time more slow changing rate.
• Test: set to 1 to test the script, the input for Altitude is taken from the throttle stick. Set to 0 to use the real Altitude from the sensor

Output:

• Ascend/descend rate in meters per minute. Positive rate means ascent, negative rate means descent.