1. Verify Wiring Pinouts Strictly: The ESC and O3/O4 Air Unit cables on this stack feature a redundant multi-pin design, which differs from standard standard pinouts. Always cross-check the wire sequence (pin-to-pin) before plugging them in. DO NOT plug them in blindly, or you risk burning out your Air Unit or Flight Controller.
2. Add Stack Spacers for Clearance: Due to the thick metal heatsink, the FC bottom components may physically interfere with the ESC armor. You MUST install the included spacers or nylon nuts between the ESC and FC to ensure enough clearance and vibration dampening space.
3. Configure Refresh Rate (Prevent Crashing): The F405 MCU has limited processing power. If you enable Bidirectional DSHOT (RPM Filtering), please set your PID loop/gyro refresh rate to 8K/4K or 4K/4K. DO NOT run at dual 8K, as overloading the CPU can cause mid-air freezes or random reboots.
4. Motor Direction Adjustment: If you cannot change the motor direction in Betaflight Configurator after enabling Bidirectional DSHOT, go to the CLI tab, type: set dshot_bitbang = AUTO and press Enter, then type save. Alternatively, temporarily disable Bidirectional DSHOT, change the motor direction, and re-enable it.