- FS-IA6는 i-BUS를 지원하지 않는다.
https://www.propwashed.com/ibus-betaflight-guide/
FlySky RX Installation
Although Betaflight supports PWM receivers, we highly recommend getting a receiver that outputs iBUS. iBUS is a digital protocol like SBUS which will reduce your latency, increase control signal accuracy and significantly decrease the complexity of your wiring. There are currently two FlySky receivers on the market that support iBUS:
FS-iA6B – If you are flying racing miniquads, this is the receiver you’ll want for now. That being said, it’s incredibly bulky, doesn’t break down easily, and will not easily fit in smaller racing quads. Again, the antennae are not replaceable.
The FS-iA6 receiver that comes with many FlySky i6 radios does not currently support iBUS. This will be fixable soon though with the upcoming release of Betaflight 3.1 though! It will require a little bit of modification to the receiver but will be well worth it in cost savings. Expect an article here on Propwashed on how to do it.
FS-IA6 는 PWM 방식만 지원한다.
PWM - Pulse Width Modulation
PWM has been around for a long time in the radio control hobby and is the protocol that your ESC’s and servos talk to each other on. The analogue signal takes the form of a pulse, and the length of the pulse represents a specific value, with 1000 being minimum, and 2000 being the maximum value.
Each channel has its own single wire, so if you have an 8 channel receiver you will need to connect 8 wires to read the inputs into your flight controller.
PPM - Pulse Position Modulation
PPM is also an analogue signal, but instead of using a separate wire for each channel, PPM stacks each signal one after another to send them all along the same wire. This makes wiring your R/C Receiver to your autopilot much easier! Other variations of PPM include CPPM, and PPMsum which are slight variations introduced by specific manufacturers.
SBUS - Serial Bus (S.BUS)
SBUS, as the name suggests is a serial communication protocol. This was introduced by Futaba, but is commonly used by many FrSky products too. In addition to being a digital signal, the main advantage of Sbus is that it can support up to 18 channels using just one signal cable!
IBUS (flysky)
Similar to, SBUS, IBUS is a new digital serial protocol developed by flysky and will be used on many of their new products going forward (such as the FlySky FS-i6X 274). It is a two way protocol which means that it can send and receive data, so your radio can send data to your aircraft receiver, and the receiver can send data back to your transmitter such as battery voltage.
Flysky RX Protocols
In addition to the older analogue PWM and PPM protocols, newer Flysky receivers also support iBUS protocol.
Similar to SBUS, iBUS is a digital serial protocol that allows for up to 18 channels to be supported on a single wire (compared to the 16 channels offered by SBUS). These digital protocols have less latency than PPM, providing an overall better solution to traditional analogue RX signals.
Another point in favour of iBUS over SBUS is that the signal is un-inverted, so you are not required to invert the signal when using F1 and F4 boards as you do with SBUS.
Note: Micro RX often do not support PWM due to their limited physical size to provide sufficient space for the necessary solder pads.
https://www.propwashed.com/ibus-betaflight-guide/