Posted at 2020-07-22 by @fanoush

Any made for Nordic SDK12 and SoftDevice S132 3.0. Package must be signed as Nordic secure DFU requires it, but any key will do since the signature check is disabled.

Posted at 2020-07-22 by @gfwilliams

So yes, you can flash whatever you want.

If you want to use Espruino signing key then that's actually public in the Espruino GitHub repo.

Obviously it's a bit of a security issue so we've disabled buttonless DFU - you have to be physically with the Bangle to press the correct buttons to reboot it into bootloader mode first.