Flash Tool
Flash firmware via USB DFU or serial bootloader
Firmware Stack
No Connection
Connect your FC in DFU mode: hold BOOT while plugging in USB, then click Scan.
What is DFU flashing?
DFU (Device Firmware Upgrade) is a USB protocol that talks directly to the STM32 bootloader. It bypasses the serial bootloader entirely.
Serial bootloader uses the FC's UART to flash firmware. This is the most common method and works with most boards.
When to use DFU: Some H7-based boards (like Matek H743) work better with DFU. It's also useful when serial flashing fails or when you need to recover a bricked board.
To enter DFU mode, hold the BOOT button on your FC while plugging in the USB cable. The board will appear as a DFU device instead of a serial port.
No drone connected. Select your board and firmware manually, or connect a drone for automatic detection.
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Firmware flashing requires Web Serial or WebUSB APIs. Use Chrome or Edge.
Target Board
0 boards available from ArduPilot manifest
Firmware Version
Firmware Source
Flash Method
Pre-Flash Safety Checklist
Flashing new firmware will erase all current settings. Complete all checks before proceeding.