Invalid Device - FlipperZero Repair 

If, like me, you enjoy playing with your flipper and happen to install a somewhat unstable custom firmware, you might find yourself faced with this error message on your qFlipper Application. It becomes impossible to update your firmware, whether through the qFlipper GUI or the web interface!

No need to panic—I have a solution! Well, there's probably a simpler way to do it, but this one works! 😄

Turn on DFU mode

First you'll need to turn your flipper into DFU mode by doing this steps from the official Flipper Wiki, here is the link:

- https://docs.flipper.net/basics/firmware-update/firmware-recovery#2vuS0 

Clone and build

Once your friend is in DFU, you'll need to dowload the firmware source and build everything, here are my linux commands:

git clone https://github.com/flipperdevices/flipperzero-firmware.git
cd flipperzero-firmware
./ftb

Just wait a few minutes and you should see this screen, note were the firmware is stored, you'll need that for later

Setup Rules

Next step is to update the qFlipper Rules, download the github repo and execute the script

git clone https://github.com/flipperdevices/qFlipper.git

cd qFlipper

chmod +x setup_rules.sh

./setup_rules.sh

Install from file

Now you can restart your qFlipper application and select the firmware file like below

Just wait a bit until your Flipper is fully updated, then upgrade it again using the qFlipper app by pressing the Green Button !

Enjoy !