STM32F405, ICM20602, BFOSD, 6x PWM / DShot outputs, 32M Flash Blackbox, 20×20 mounting holes


  • MCU: 168MHz STM32F405
  • IMU: 32K ICM20602 accelerometer/gyro (SPI)
  • Support 32K Gyro update & 16K PID Loop
  • OSD: BetaFlight OSD w/ AT7456E chip
  • Blackbox: 32M(256) Flash
  • Built in inverter for SBUS input (UART2-RX)
  • PPM/UART Shared: UART2-RX
  • SoftSerial & Camera control supported on S5 & S6
  • Battery Voltage Sensor: 1:10
  • Current Sensor: No (FCHUB-A5 option)
  • BEC 5V: No (FCHUB-A5 option)
  • LDO 3.3V: Max.300mA for Spektrum RX
  • I2C1 SDA & SCL available
  • WS2812 Led Strip : Yes
  • Beeper : Yes
  • RSSI: Yes
  • 2x LEDs for FC STATUS (Blue, Red)
  • 6x PWM / DShot outputs without conflict
  • 5x UARTs
  • 1x 14pin top mounted FFC Slot for FCHUB-A5 connection
  • 28x28mm PCB with 20mm mounting holes
  • w/ 6x silicon grommets M4 to M3
  • w/ 6x brass grommets M3 to M2
  • w/ 2x 0.5mm*14Pin 3cm Flexible Flat Cable

BF SmartPort and Camera Control

Enable SoftSerial_TX on S6 pad

1. Connect the inverted telemetry signal to S6 pad

2. Turn on “SOFTSERIAL” & “TELEMETRY” in Configuration tab

3. CLI commands as following

  • resource motor 6 none
  • resource serial_tx 11 A08
  • save

4. Choose SOFTSERIAL1 for Smartport in Ports tab.

Enable Camera control on S5 pad

1. Connect “OSD” pin of camera to S5 pad

2. CLI command as following

  • resource motor 5 none
  • resource camera_control A15
  • save

3. Stick commands for controlling the camera

  • ENTER: Roll Center, Pitch Center, Throttle Center, Yaw Right
  • LEFT: Throttle Center, Yaw Left
  • RIGHT: Throttle Center, Yaw Right
  • UP: Throttle Center, Pitch Up
  • DOWN: Throttle Center, Pitch Down
  • Adjust Value: Pitch,Throttle & Yaw Center, Roll Left or Right
inav wiring flying wing

inav wiring flying wing



  • Enclosed silicon grommets are necessary to avoid the vibration woes.
  • Enclosed brass grommets are used to converte M3 to M2.
  • CLI “defaults” after reflashing
  • If you use the 5V VTX(e.g. Unify Pro), Pls power the VTX from the 5V pad on FCHUB.  The ribbon cable can’t bear heavy current.
  • If choose Gyro 32kHz & PID loop 16kHz,  pls set Blackbox logging rate 1K max.
  • 32M Flash can record 40~50 minutes with 1K rate
  • 2812LED_Strip share I2C1_SCL pad as default.  either enable LED_Strip, or enable Baro/compass.
  • 2812LED can be resourced to S5 (PA15)  or S6(PA8) if using Baro the same time with BF firmware