The Pixhawk and PX4 flight stack are workhorses in DIY drone world.

Often paired with an OpenTX receiver such as the FrSky, you have a powerful combination.

Pixhawk Plus aims to make better use of this great combination by providing an easy-to-use, modular set of add-ons:

1. Telemetry pass-through from the Pixhawk to your OpenTX receiver.
2. Robust LED indicator lights--multiple arms, multiple programs.
3. Per-cell LIPO voltage monitoring.

• Get the code
• Get the hardware
• Assemble and go!

See the Wiki for complete instructions