Protocols: ExpressLRS, TBS, Frsky, oh my 🤯
## What?
Protocol is a language of transmitter (aka TX) in your hands and the drone's receiver (RX). They simply MUST understand the common language for the drone to fly.
It works like:
- You twist the trottle gimbal
- Transmitter to drone: "throttle 42"
- Drone: "42, understood — _motors buzzing_"
So whatever letters are there: TBS, ELRS, Crossfire — they must be the same letters, and the same version (V1, V2, V3...), definitely the same radio frequency (900MHz, 2.4GHz).
## Which to choose