v1.7 - Jun 2019
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P a g e
Audio Buzzer
From version 10 (firmware version 10.m04) there is an experimental Audio Buzzer that can be used
to indicate light lift. The audio buzzer provides a fast beeping indication. If useAudioBuzzer is true
then it will start when the rate of climb is buzzerThreshold m/s below the liftThreshold.
Beep Cadence
When beeping commences a beep is initiated for a duration based on the measured vertical speed.
As soon as the beep stops a silent pause will then be initiated, again for a duration based on the
measured vertical speed. The graph below shows the formula used to control the beep duration
based on the measured lift. Essentially, it means the faster you are going up, the faster the beeps
will occur. Note the rateMultiplier settings can make it go faster as shown below. A rateMultiplier
setting of 0.5 will make it beep twice as fast.
From firmware 10.6 speedMultiplier will alter the beep duration by adjusting the actual speed
according to the value in the graph below. A speedMulitplier of 2.0 will make the beep duration half
as sensitive to vertical speed changes.
