I was getting a little annoyed at having the low voltage false alarm warnings on my Frsky Taranis on every punch out, this is how I fixed it.
This tutorial assumes you have already setup voltage telemetry on your quad either via the A2 port or Smartport on your Frsky receiver, but like me you might be getting warnings often as the voltage sags when you draw a lot of current (like in a punch out).
What this setup will do is only warn you when you need to bring your quad back in with minimal false alarms.
There are two parts to this setup, first is the logical switches to trigger the warning, and the second is special functions that will actually warn you
There are two lines you need to setup, the first is to detect if you are doing much more than hovering your quad, this is important because we want to ignore battery warnings when the throttle is above this throttle value. My quad hovers at about 30% throttle, if yours needs more then it might be a good idea to raise this to about 10% over your hover throttle.
The second logical switch only triggers when L1 is on (less than 40% throttle), and voltage is below 14.15V. It will only trigger if the values are held for over a second (to give the battery time to bounce back from a punch out), and won’t trigger again if its been less than 6 seconds since the last time.
Once the logical switches are setup, we need to tell the Taranis to do something about it. The below lines will tell the Taranis to tell you the battery is low, and then tell you the current voltage once the L2 logical switch is triggered. It won’t say it again if its been less than 15 seconds since the last warning.
Just raise the voltage trigger level or throttle trigger level if the warning is triggering too early for your liking.
Generally if it isn’t triggering during a hover and the battery is low, then you need to raise the throttle trigger level to more than 40%
If the warning is triggering, but too late, try raising the voltage trigger level.