User Guide for Flashing and Tuning the SpeedyBee F405 V3 Stack with Betaflight
Version 0.2
To proceed, REMOVE the propellers from your UAV and connect the VTX.
Appendix #2. Flashing Betaflight firmware in DFU mode
In this manual, the issue of fine-tuning the flight controller and ESC is not considered. This is due to the fact that each UAV operator has his own vision on this issue. And nowadays, the UAV flies well on standard settings. Links to instructions where fine-tuning Betaflight is considered in detail are provided at the end of this manual at section “Useful video”. You can view them if you're interested, but you don't have to.