Adds Support for OpenTX 2.3
Adds:
Milli-liter per Minute
Milli-liters per Minute
Trim
Auto Trim
Front Wheel Steering
Rear Wheel Steering
Four Wheel Steering
Four Wheel Drive
Two Wheel Drive
Forward
Rear
Axle
Crawl mode
Crab mode
Tip alarm
Reverse
waypoint
waypoint mode
loiter mode
gps position hold
gps on
gps off