Crazyflie 2.0 won't start anymore

[Che.]

Hi, its me again.

My Crazyflie won't startup anymore. When pushing the ON/OFF button only LED M2 will light blue. When starting Bootloading Mode LED M2 will start flashing. All other LEDs aren't lit at all. About 5 minutes ago everything still worked well

[Che.]

Do you have any troubleshooting tips for me? like total reset of firmware, for instance. Note, that I cannot connect via Dongle anymore. Is it possible, to flash via usb or something?

Or how can I check, that my hardware isn't broken?

Thanks for your help

[tobias]

Start by checking the power supply to the STM32F4. You can check the VCC on the expansion port, should be 3V. Else it is really hard to give any advice without more information. How did it happen, e.g. after flashing some custom FW?

[tobias]

You can always try to reflash the STM32 using DFU and see if that works. If the bootloader has been overwritten or similar your behavior could happen so start by flashing that back with:

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sudo dfu-util -d 0483:df11 -a 0 -s 0x08000000 -D cf2loader-1.0.bin

Then flash the official release with the cfclient.

[Che.]

Start by checking the power supply to the STM32F4. You can check the VCC on the expansion port, should be 3V. Else it is really hard to give any advice without more information. How did it happen, e.g. after flashing some custom FW?

When in described state the output of VCC-Pin is just around 0.54V.
Yes, I was flashing my firmware, just like always, changed one line. First I had the GPIO go high, then low for triggering my external sensor. I was messing around a bit because I had little bugs in my measurement, so I tried switching the GPIO-Pin high again.

Then the error happened.

I will try to reflash the STM32 via DFU.

Can you tell if the Hardware is OK with my report above?

Greets

[Che.]

Hi Tobias,

I am using serveral virtual machines. Getting the flie in DFU mode was not a problem, but the virtual machine wont recognize it, e.g. with lsusb it wont show up in the list.

Output from lsusb is:

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Bus 001 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub
Bus 001 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Update:
Windows (my host OS) wont recognize the STM32 either.

[tobias]

Hmm, when you put it in DFU mode do both blue LED blink? Please also check VCC when in DFU mode that it is 3V.

If it is OK it needs a driver and you can use the same as for the Crazyradio PA (Zadig)

[Che.]

No, only one LED blinks. VCC is only 0.45 V.