GHST protocol

GHST is a serial protocol used by Ghost RC link of ImmersionRC. It is used for communication between flight controllers and receivers, as well as between radio controllers and transmitters.

GHST is a fast (compact) protocol, with short packets, low latency and 12-bit resolution for the primary flight channels. Its specifications:
 * Frame time: same as over-the-radio
 * Baudrate: 420,000
 * Packet duration: 300 us
 * Channels: 12
 * Telemetry: available
 * VTX control: full (for ImmersionRC Tramp)

Betaflight is expected to add support for GHST in version 4.3. GHST is fully supported by OpenTX since version 2.3.12.