After unsuccessful bootloader update - Unable to boot

Hey,

I wanted to update my bangle.js 1 and connected it via bluetooth to do so. There was an update available for spps, including the bootloader. The bootloader was removed to perform the update. Unfortunately km an error and the update was not installed. After that the battery was dead and now the following message comes up when booting:

DFV ZYOS

BOOTING...
BTN1 = REBOOT

Unfortunately it does not go away no matter what I do. Is there any way to reset the uhr? Or what else can I do?

Thnks

Hi - How exactly did you update via Bluetooth? Did you just update the apps via https://banglejs.com/apps/ ?

The Bangle effectively has 4 bits of software:

• The DFU bootloader (the thing that says DFV ZYOS - it's actually DFV 2V05)
  
• The Bangle.js/Espruino firmware
  
• The JS Bootloader
  
• The JS Apps
  
  

If you used https://banglejs.com/apps/ you should only really have been able to update the last 2 (and not the first 2). A Firmware Update app does exist on https://banglejs.com/apps/ but this is for Bangle.js 2 and shouldn't work on Bangle.js 1.

Please can you just follow the steps here:
https://www.espruino.com/Bangle.js#resetting-without-loading-any-code

And if that works you can just connect with the app loader again, update the apps (maybe uninstall and reinstall the bootloader if there was some issue there) and you should be fine.

Otherwise did you use the NRF Connect app to to an update? like https://www.espruino.com/Bangle.js#firmware-updates ?

If that failed you'll still be fine, but you just have to follow those steps to update the firmware again.

Hi Gordon,

thank you for your fast response :)
So I used at first https://banglejs.com/apps/ and than the nrf to update the firmware.

With the tutorial from you, I'm now able to boot again! Great I just needed to update the firmware again. Thats it. Thank you again! :)

Ps. Sorry for the stupid question and that you had to waste your time for that.

No problem - glad you got it sorted!