Overview & Initial Setup

The CBU-CM405-FC is a small RPAS flight controller designed to mount directly to a Raspberry Pi Compute Module 4 (CM4). It measures just 55x40mm and weighs 16g. All flight control is processed on the STM32, allowing the CM4 to run any OS, no need for a Real Time Kernel!

  • 5v, 3Amp Regulator

  • MCU: STM32F405

  • IMU: 1x ICM20602, 1x BMI270

  • Barometer: BMP280

  • Dual Micro SD Card slots

  • 5x UARTs (1 reserved for CM4) (Female Headers)

  • 1x I2C

  • 2x ADC (Voltage + Current Sense)

  • 2x MIPI CSI Cameras (2 Lane-CAM0 & 4 Lane-CAM1)

  • 4 Port USB Host Hub (Male Headers)

  • DFU/EMMC/Telemetry Micro USB Ports

Initial Setup

Upon removing from the packet please inspect for damage.

  1. Slide both DIP Switches to the ON position

  2. Connect the micro USB port to the PC avoiding USB extensions. See notes on power supply requirements.

  3. Flash the STM32 with the latest available Firmware.

  4. Disconnect power.

  5. If using with a CM4, Slide both Dip Switches to OFF. If no CM4 is installed Slide Only "1" to OFF.

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