
Starting DFU ode
DFU (Device Firmware Upgrade) mode can be activated from the Flight ketch App for altimeters
running firmware 27+. Expand the “ ettings” menu next to the device name and select “Activate
DFU”. The altimeter will re-start and the status LED will stay on indicating DFU mode is active.
For devices running older firmware or to start DFU without the app, power on the altimeter while
shorting the 1st and 4th pads from the end of the programming header. This can be done with anything
conductive, paperclip, wire, or tweezers are convenient options. Press the power button to turn on the
altimeter while the pads are shorted and then release. The status LED will stay on indicating DFU
mode is active.
To clear DFU mode, successfully complete the update process or remove the battery to reset the
altimeter.
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