Quick Answer
Flashing Betaflight means installing the firmware on your flight controller and setting it up for your specific build. You need a USB cable, the Betaflight Configurator (Chrome), and about ten minutes. The process is connect, flash, configure your receiver, set ESC protocol, and assign flight modes.
What You Need
- A flight controller with USB connection
- A USB-C or micro-USB cable
- Google Chrome browser with the Betaflight Configurator extension
- Your receiver connected and bound to your radio
Flashing Firmware
Connect your FC to your computer via USB. Open Betaflight Configurator and click the "Connect" button at the top. If the connection fails, check the baud rate setting and try again. Once connected, go to the Firmware Flasher tab.
Select your board from the dropdown, choose the latest stable Betaflight release, and click "Flash Firmware". The process takes less than a minute. After flashing, the board will reconnect automatically and you will be on a clean configuration.
Basic Configuration
The key settings to configure before your first flight:
- Board alignment: Usually default, but verify if your FC is mounted at an angle
- Receiver protocol: Match your receiver type (ELRS uses CRSF, Crossfire uses CRSF too)
- ESC protocol: DShot300 for most modern ESCs, DShot600 if supported
- Mixer: Quad X is the most common frame type
- Motor direction: Use the motor tab to confirm all four spin correctly
First Flight Setup
Assign your flight modes on the Modes tab. For a first flight, enable Arm and Angle mode at minimum. You can add Horizon and Acro later once you are comfortable.
Check the OSD tab to enable the telemetry overlays you want to see in your goggles: battery voltage, RSSI, timer, and craft name are good starting points. The SpeedyBee F405 AIO V2 includes an OSD chip and built-in current sensor, making the initial setup straightforward.
What to Buy
- SpeedyBee F405 AIO V2 for compact 3-6S builds with USB-C and Bluetooth
- GEPRC GEP-F405-HD V2 for 5-inch freestyle with a clean standalone FC layout
- Happymodel ELRSF4 AIO for whoop builds with SPI ELRS already built in
FAQ
Q: Will flashing Betaflight erase my settings?
A: Yes, flashing replaces everything. Back up your config with the CLI diff command first if you have an existing setup you want to keep.
Q: Do I need to flash ESC firmware separately?
A: Yes. The FC firmware is independent of the ESC firmware. Use Betaflight Configurator's Motors tab to flash ESC BLHeliS/AM32 firmware after setting up the FC.
Q: What if Betaflight Configurator won't connect?
A: Try a different USB cable first. Then check that the correct COM port is selected and the baud rate is set to 115200. Some boards need the boot button held during USB connection.