How to fix Betaflight Bootloader won't connect failed to open port

5 year after your video was out, you saved my life. You are a real one

Legand!!

!! The programm you dont know the name of is ZADIG ! i have tried so long to find that name twice but this is it!

Thanks man 👍👍👍

steel helpful

Thank you for the help, your the goat

No matter what I tried did not solve the issue. I am surprised at Betafilght and Inav having such a simplistic devastating issue.

Thank you so muck, finally got my drone working...

This video saved me so much more headache. Thank youuuu.

Thanks man! This video helped me solve the issue :)

thanks man!

For Zadig I show 'DFU in FS Mode" while in "boot mode" this happens by typing BL in the CLI line or plugging the FC in while holding the boot button. While not in boot mode it reads "STM32 Virtual ComPort in FS Mode" Any ideas?

5 years later and u helped me a lot ❤

You are a life saver man 🥰

man thank u for this video

Nobody can seem to help me with this error and i am at my whit's end with it. Failed to open serial port. Everyone keeps telling me to download the cp210x drivers. Maybe i did? I don't know. i downloaded the Windows Drivers and I downloaded the Windows Drivers With Serial Enumerators. Opened them. Extracted them. Boom opened up with the 64 bit installer. Ran the installers. Finish. I still get the failed to open serial port message. When i tried to download the Universal Windows Driver, and then opened the file when it was finished downloading, it didn't contain the 64bit and 86bit installers like the other 2 that i downloaded. I don't know if maybe that is the issue or? All of my solder joints are perfect and they are where they are supposed to be lol. idk dude somebody please help meeee :(

you just made me day brutha ! got it working now. thank you so much dude

5 years later you're still helping people. Thanks man !

5 years and and still is a best video ever!

5 Years later and still a lifesaver. Thank you

thank you

My man ! Just letting you know that you made my day 🥰 as a starter software is a nightmare 🙆

thx you so much!

Great job, had to hold down the button on my FC to get it to show STM32 Bootloader in Zadig

Thanks for the very clear and helpful video. Now im back in track...

i was following your steps but now it got even worse, my betaflight does recognize my flight controller anymore, what do i do?

it's pathetic that I have to do this. shit could just update when I click update

Thank you so much for this video.

This doesn't make sense idk how to zip a file and it's so confusing u didn't do it all the way through and how how to do it my drone always says failed to open and won't connect

My guy I couldn't connect my FC to betaflight I have been searching for an hour untill I stumbled onto your video you are a legend.

now I can't leave the bootloader mode

I've spent wayyyyyyyyy to much time trying to figure this problem out....two days into it lol, THANK YOU so much brother! problemo solved i owe you a beer hahaha!!

Hi JB,

after 2years in the hobby i failed to get an connection with BF on a pc/laptop.
I always use speedybee but its limited.

now i have a new laptop with windows 10 on it. but the STM drives doesnt support win.10.
so i need another virtual com port drive to fix this problem i think.
do you have the sulution?

Thanks in advance. greetz Jordi

thank you so much

Great video. after looking for the CP210X download for 2021 its not clear which on to use. Its also not clear which to chose in Zadig. The STM driver site does not show downloads. thanks

Thank you soo much!

zadig softvare dont find stm32 bootloader on my pc, and betaflight says 'failed to open serial port', what do i do?

You just made my day so much less frustrating. Huge thanks!

Excellent.

hello, when i plug in my USB it just says unknown USB Driver detected

does anyone know what one i need for the emax tinyhawk?

4 years later you're still helping people. Thanks man ! :-P

Thanks heaps mate, i purchased the Speedybee adaptor to get around this but the app doesnt have as up to date list of firmware as the p.c version of B.F. For the others that may be as daft as me, clicking update firmware was insufficient to actually put me in update ready mode....had to have bootloader button pressed when connecting usb to f.c for single solid red led.

helps allot thanks men

I've spent the last 2 hours trying to figure this out. Thank you so much!

Maybe we can exchange email? If you have some time sometime that is.

thanks homie!

thanks for the video but is there a software that is not ZADIG to run on MAC cause this software only runs on windows.

i have mac. cant download all 3