Serial port failed

I was putting files on my Flipper zero from and it failed because it could not access serial port. Then i tried to troubleshoot this issue but noticed now my Flipper zero does not show up on my windows when i connect it via usb anymore. I think it might be from changing the firmware from Released to developer. how do i fix my flipper zero?

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Thank you but i have tried this already and still have issue with serial port.
I might just buy another Flipper Zero im so frustrated

Try reverting the firmware to a previous release. Use the app on a phone via bluetooth if you can.
Download a previous build on your phone.
Open the Flipper app.
Near the top you will see “update channel”
Select “custom”
Upload the file you downloaded.

Alternately press Down Left Up on the Flipper. Look for a folder named updates. There are recovery files in there.

What does this mean? The system is doesn’t see any device when you connect a device to PC? You try both Serial and DFU modes? Have you try this Troubleshooting drivers on Windows - Flipper Zero - Documentation

Please show the dmesg log when connecting device to Linux machine.

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I was and AM having the same issues. I have found that if I close out some programs running in the background “Game First VI” (A program that optimizes programs for gaming), I can then reboot my Flipper and then connect. I think that “Game First” is trying to optimize the connection. OR it could be a browser setting. (I use Chrome)

So I have a flpper zero, trying to do some general setup stuff and have been trying to install ESP Flasher from both…when I got a message saying there was a build time out message, i tried downloading it from After I find the app, I click on “install” and I get a flipper disconnected and a “connect” button that does nothing at all.

I’ve tried on chrome, edge, and opera and I get nothing. That being said, I can connect to the flipper using the qflipper app. So the cable seems fine. Any thoughts or suggestions to point me in the proper direction would be very appreaciated.


Disregard the question. While I was in the site, when I clicked on “My Flipper” in the left hand menu, I was able to connect and was able to install the app.

Just throwing that out there.