Variant IBUS

This variant can be used with Flysky RC Receivers compatible with IBUS protocol.
It will send all channels on a single wire like PPM, but is more reliable as it is a digital protocol using a USART frame and checksum.
Default number of channels for IBUS in config.h is 14 (successfully tested with Flysky fs-I6AB and RX2A).

Wiring:

• Connect IBUS port of your receiver to green wire on right sensor cable(shorter)
• If you want to use the left cable instead, replace CONTROL_SERIAL_USART3 by CONTROL_SERIAL_USART2 and FEEDBACK_SERIAL_USART3 by FEEDBACK_SERIAL_USART2 in config.h

⚠ Red wire from sensor cable delivers 15v !!! Use 3.3v from programming port, 5v from hall sensor cable, or a voltage regulator.

Transmitter configuration:

• Enable IBUS
• Assign desired joystick to channel 1(steering) and channel 2(throttle)

Calibration:

Proceed with calibration for better control.

Troubleshooting:

If the board is beeping

• Check the number of channels, even if you transmitter only handles 6 channels, you receiver might transmit more channels
• Make sure you enabled IBUS on your transmitter, on some models it is activated together with PPM
• Make sure you are using the sensor cable(left or right) selected in config.h
• On some boards the wire colors might differ, try the blue wire