How to flash firmware for a bricked flight controller using SpeedyBee Adapter 3/2?

When an FC gets bricked, it can't boot up normally. At this point, you could use the SpeedyBee Adapter 3 or 2 to re-flash firmware for the flight controller. Take the SpeedyBee Adapter 3 as an example, please follow these steps:

1. Unplug the end of the cable of Adapter 3 that need to connect to the flight controller. For example, if your flight controller's USB port is TYPE-C, you should unplug the TYPE-C end of the SpeedyBee Adapter 3's cable.

2. Plug in a Battery to the SpeedyBee Adapter 3.

3. Press and hold the flight controller's BOOT button with one hand and at the same time, plug the cable to the flight controller with another hand. Three seconds later, release the button. At this moment, the flight controller should enter DFU mode.

4. Open the SpeedyBee app, and enter into the FC Firmware Flasher page. And follow the steps in the app to flash firmware for the flight controller. Make sure to choose the right firmware target name for your flight controller. Otherwise, even if you could flash firmware for the flight controller, it still can't boot up properly.