How to Update Betaflight Firmware
Updating Betaflight firmware keeps your flight controller compatible with current Betaflight Configurator features, newer target definitions, and important performance fixes.
This guide explains how to update Betaflight firmware safely, what you need before flashing, and how to confirm everything works after the update.
Because a bad flash or wrong target can leave a quadcopter unable to arm, it is worth understanding the process before you click update.
The steps below are designed to help you move from an older firmware version to a current release with minimal risk.
What Betaflight firmware does
Betaflight is open-source flight control software used on many FPV drones and multirotors.
The firmware runs on the flight controller and manages core functions such as gyro stabilization, receiver input, arming logic, motor output, and failsafe behavior.
When you update Betaflight firmware, you are replacing the code on the flight controller with a newer release.
The update may improve compatibility with digital and analog FPV systems, refine filtering, add target support for boards from manufacturers such as Holybro, SpeedyBee, Mamba, and iFlight, or change default settings that affect flight behavior.
Before you flash: preparation checklist
Preparation matters because Betaflight firmware updates often reset configuration values.
Before you begin, make sure you have access to the current setup and a reliable USB connection.
- Betaflight Configurator installed on your computer
- Correct USB cable with data support, not charge-only
- Flight battery disconnected during flashing
- Current settings saved for reference
- Board target identified from the flight controller label or Configurator
If possible, open the existing configuration and note receiver protocol, mixer type, PID settings, rates, OSD layout, modes, and port assignments.
Many pilots also take screenshots of each Configurator tab so they can restore values later if needed.
How to update Betaflight firmware through Betaflight Configurator
The easiest method is to use the built-in Firmware Flasher in Betaflight Configurator.
This is the standard workflow for most modern flight controllers.
1. Connect the flight controller
Plug the flight controller into your computer by USB and wait for it to power up.
Open Betaflight Configurator and confirm that the board appears in the top-right status area or the COM port selector.
2. Open the Firmware Flasher tab
Select the Firmware Flasher tab in Configurator.
The tool will detect supported targets and let you choose the Betaflight release version you want to install.
3. Select the correct target
Choose the exact target for your flight controller.
The target name is usually printed on the board, listed in the product page, or shown in the Configurator backup.
Using the wrong target is one of the most common reasons a flash fails or the board behaves unpredictably afterward.
4. Choose the firmware version
Select the release you want to install.
For most users, the current stable release is the best choice because it balances features and reliability.
Release candidates and development builds are better suited to experienced users who want to test new behavior.
5. Enable full chip erase if needed
For a clean installation, enable Full chip erase.
This clears older settings and reduces conflicts between old configuration data and the new firmware.
If you are troubleshooting, a clean flash is usually safer than preserving settings across major version changes.
6. Flash the firmware
Click Load Firmware [Online] if needed, then Flash Firmware.
Keep the USB cable stable and avoid disconnecting the board until the process finishes.
The Configurator will display progress and confirm when flashing is complete.
How to update Betaflight firmware on a flight controller in DFU mode
Some boards do not connect normally and must be flashed in DFU mode, which stands for Device Firmware Upgrade.
This is common after a failed flash or when a board ships with firmware that needs replacement before normal USB communication works.
To enter DFU mode, hold the boot button while connecting USB, or short the boot pads on the board if no button exists.
In Configurator, the board may appear as a DFU device rather than a standard COM port.
Once detected, use the same Firmware Flasher tab and proceed with the target selection and flashing steps.
How to back up Betaflight settings before updating
Backups are useful because firmware upgrades can change defaults, and some values may not migrate cleanly.
Betaflight Configurator includes a CLI-based backup method that lets you save your current configuration.
- Connect to the board in Configurator
- Open the CLI tab
- Type diff all or dump all
- Copy the output into a text file
diff all shows changes from defaults, while dump all provides a more complete configuration snapshot.
Even with a backup, do not blindly restore every setting after a major version jump.
Some parameters are deprecated between Betaflight releases and may need manual adjustment.
What to do after flashing Betaflight firmware
After the update, reconnect to Configurator and review the most important tabs before arming the quad.
The goal is to confirm that the board, receiver, sensors, and outputs all match your hardware.
Check the firmware version and target
Go to the Setup or About area and confirm the firmware version and target name.
If the target is wrong, stop and reflash before proceeding.
Reapply key settings
Restore or re-enter receiver settings, flight modes, UART port assignments, VTX control, OSD preferences, motor direction, and beeper settings.
If you use a 4-in-1 ESC with bidirectional DShot, verify that the motor protocol and RPM filtering settings match your build.
Calibrate and test carefully
Confirm that the accelerometer is level if your build uses angle mode or horizon mode.
Then test the receiver in the Receiver tab, check sticks for correct channel order, and verify that arming works only when expected.
Spin motors without props first to confirm direction and motor order.
Common problems when updating Betaflight firmware
Most update issues are caused by a wrong target, incomplete erase, driver problems, or restored settings that no longer match the new release.
- Board not detected: Try a different USB cable, reinstall drivers, or use DFU mode
- Flash fails: Confirm the target and check whether the board needs a bootloader reset
- Configuration lost: Restore values manually from your backup
- Receiver not working: Recheck serial port setup and protocol selection
- Motors do not spin: Verify ESC protocol, resource mapping, and arming conditions
When the board updates successfully but the quad will not arm, inspect the Configurator status bar.
Betaflight usually shows an arming disable flag that points to the specific issue, such as throttle too high, no gyro calibration, or failsafe active.
When should you update Betaflight firmware?
You do not need to flash every release immediately, but updating is worthwhile when you want support for a new flight controller target, need a bug fix, or are setting up a fresh build.
Pilots often update before tuning a new drone, changing to a different FC/ESC stack, or migrating from an older major version that is no longer well supported by current tooling.
If your quad is flying well and you depend on a stable setup for racing or cinematic work, review release notes before updating.
Betaflight updates can introduce improved defaults, but they can also require manual review of filters, rates, and feature flags to match your flying style.
Useful terms to know before flashing
A few Betaflight-specific terms make the process easier to understand:
- Flight controller: The board that runs Betaflight and interprets sensor data
- Target: The firmware build matched to a specific board layout
- Configurator: The desktop app used to flash and configure Betaflight
- DFU mode: A boot state used for direct firmware flashing
- Full chip erase: Clears old data before installing new firmware
Knowing these terms helps you troubleshoot quickly and reduces the chance of flashing the wrong build or restoring incompatible settings.
Best practices for a clean Betaflight update
Experienced FPV pilots usually follow a few habits that make firmware updates more reliable.
Use the latest stable Betaflight Configurator that supports the firmware branch you are installing.
Keep a copy of your settings backup outside your drone case so it is easy to find later.
After flashing, verify one subsystem at a time instead of trying to arm immediately.
It also helps to review the official Betaflight documentation and release notes for changes affecting arming, PID defaults, or resource remapping.
Small changes in firmware behavior can affect flight feel, especially on lightweight freestyle builds, whoops, or long-range quads with GPS rescue enabled.