03
Transmitter Configuration
Bind an ELRS radio, map the seven control channels and set endpoints that match the servo kernel.
Binding
Put the receiver in bind mode (power with the bind phrase configured, or use the WebUI / button) and start the Bind action on the radio. Your configured bind phrase yields a fixed UID; a successful bind is confirmed by a solid link LED and live channel movement in the WebUI state poll.
Channel mapping
| Radio channel | PteronautOS role |
|---|---|
| CH1 | Aileron (roll) |
| CH2 | Elevator (pitch) |
| CH3 | Throttle (flap drive) |
| CH4 | Rudder (yaw / crest) |
| CH5 | Arm (safety switch) |
| CH6 | Flap frequency modulator |
| CH7 | Flight profile selector |
Map the seven channels in that order. PteronautOS reads them in CRSF order, so keep CH1–CH4 in the default AETR layout and assign the arm switch, flap-frequency modulator and flight-profile selector to CH5–CH7 (or match whatever the mixer expects if you reordered them in the config).
Endpoints & direction
Set the radio output to ±100% (CRSF 172–1811 µs around a 992 µs centre). Do not use extended limits — the servo kernel already maps the full 988–2012 µs pulse envelope and clipping the radio only wastes resolution. Sub-trim must remain zero; neutral is 1500 µs by design.
Rates & expo
Start with 100% rates and 0% expo. Flap authority is dominated by waveform amplitude, not stick throw, so aggressive radio rates just make the aircraft twitchy. Once it glides and flaps well, add mild expo (15–25%) for a softer centre, and reduce rates only if the roll response over-commands the wings.
Verification
- Stick full right — right wing rises, left falls.
- Stick full back (pitch up) — both wings raise the nose.
- Throttle up — flap frequency increases; down — decreases or glide.
- Rudder right — crest deflects right.
- Transmitter off — all surfaces centre (failsafe).