AVR Smart Audio for RC Aircraft without a Flight Controller (FC)

c++ gifs

Overview

The goal of this project was to write the firmware to allow a miniature controller device to enable the use of Smart Audio on aircraft without needing a full blown FC running betaflight. FPVWRA wings for example do not have controller boards, but, do have FPV VTXs that may have Smart Audio capability. An Adafruit trinket was used as the controller board since it is cheap (< $9.00) and has a pretty powerful chip (SAMD21) This project is documented here on GitHub as well.

Snapshots (click for larger image)

AvrSA

GPS

Video

Demo

Software

Uses the Arduino C++ libraries, as well as some custom half-duplex software serial code, to handle both the inverted and non-inverted serial protocols used by FrSky and SmartAudio.

Hardware

AVR SAMD21…..

Firmware and other info can be found here AvrSmartAudio on GitHub.

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