Can't Flash VOXL2 (Battery Capacity is Very Low)

Dong Liu

Re: Can't Flash VOXL2 (Battery Capacity is Very Low)

The same issue with the reference post.

I followed the instruction that power on the voxl2, wait for 10 seconds, connect the USB cable. But I got

[WARNING] Failed to reboot to fastboot
Try power cycling VOXL while holding the fastboot button

We're running the voxl2 with a power adapter, no battery is used.

Dong Liu

@Dong-Liu Even I power on the voxl2 with usb cable connected, I get the same error.

modaltb

Hi @Dong-Liu ,

Normally to get around this issue, you need to bootup WITHOUT the USB cable connected initially, here's a video that shows the process:

https://www.youtube.com/watch?v=IM3PnW7cipQ

Out of curiosity, do you know the version of the the system image is on the VOXL2 presently? And what version are you trying to update to?

We should have this battery warning issue fixed in platform release 0.9+.... so I'm making sure you aren't seeing this on a that release, as it 'should' be fixed but perhaps we're missing something!

Dong Liu

Looks like we need to press some physical button. I'll ask my coworker to open the heat sink again

The system is just recovered by using qdl, voxl-version shows

root@qrb5165-rb5:/# voxl-version 
--------------------------------------------------------------------------------
system-image: 1.1.2-M0054-14.1a-FLAT-V3
kernel:       #1 SMP PREEMPT Wed Feb 9 22:21:24 UTC 2022 4.19.125
--------------------------------------------------------------------------------
hw version:   865
--------------------------------------------------------------------------------
voxl-suite:   
--------------------------------------------------------------------------------

I tried to flash it with voxl2_platform_nightly_20230521

Thanks!

modaltb

OK thanks, the 20230521 should contain the fix for the battery warning (it's in the android bootloader) but the 1.1.2 image still has the bug so yes, I believe if you're unable to get through the battery warning we need likely press the button in this case

We will also work towards updating our QDL image such that it updates to a newer version.

Let me know if you get stuck and we can perhaps get on a screen share or something.

Thanks!

Dong Liu

After multiple tries, the fastboot start to flash system images. But it got stuck. We then power cycle again, this time everything worked. We got the new nightly build flashed.

Thanks!

modaltb

Hi @Dong-Liu OK thank you for the update. Once it has been updated to the latest image, I wouldn't expect that battery error to show up in the future.... if it does please let me know!