Output Signals

Magic Box outputs RC signals four ways. Pick the one your radio, radio module, or RC chain wants:

Protocol	Type	Connection	Best for	Details
PPM	Analog	3.5 mm jack	Classic radios, trainer ports, basic radio modules	PPM
SBUS	Digital	UART (inverted)	Most modern receivers and flight controllers	SBUS
IBUS	Digital	UART	FlySky receivers, some FCs	IBUS
CRSF	Digital	UART (non-inverted)	ExpressLRS / Crossfire long-range, low-latency	CRSF

Not sure which to pick — start with SBUS or PPM

Both are linear and well-tested on Magic Box. CRSF works too but lives inside a more complex stack (ExpressLRS / Crossfire), so start there only if you already run an EdgeTX-based ELRS workflow.

Magic Box v1.4

v1.4’s UART is hardwired inverted — matches SBUS natively, no extra config. For CRSF or IBUS on v1.4 see the CRSF or IBUS pages — both have hardware caveats specific to v1.4. Side-by-side summary: Hardware v1.4 vs v2.0.

On the supplied cable? You’re done here

If you followed Quick Setup — 3.5 mm jack into your radio’s trainer port — there’s nothing on this page to set. PPM rides on its own jack and is always on; no protocol picker, no Web UI step. That’s the end of the basics.

The rest of this page is for the other three paths: a digital link to a receiver or flight controller, or a TX module wired straight to Magic Box with no radio in between.

Going further

Wiring patterns and the per-protocol detail pages live under Advanced.

Start with the wiring — most pilots wire a TX module straight to Magic Box and run an RC link from there to a receiver in the model. That base setup is the same whichever protocol you land on: pin layouts, cable vs solder pads, power options.

• Wiring & External TX Modules — module pinout examples (Bandit Micro, Ghost JR, Flysky FRM303), stereo cable vs solder pads, power options. Covers PPM-input modules too.

Then pick the protocol your downstream gear wants:

• PPM (analog) — trainer ports, jack polarity, PPM-input modules.
• SBUS (digital UART) — the digital default for most modern receivers and flight controllers. Includes an iNav receiver-tab walk-through for verifying the chain.
• IBUS (digital UART) — FlySky’s serial protocol.
• CRSF (ExpressLRS / Crossfire) — hardware compatibility per Magic Box revision, aux-channel resolution caveats, when to use it vs SBUS.

Which Magic Box board you own decides how much of the above needs care — Hardware v1.4 vs v2.0 is the side-by-side.