Baowz

Baowz unfortunately the newtmgr code doesn’t call this out. It the error could be related to the serial port itself or something else. My best guess it’s a timeout because you’re sending data that the bootloader is not expecting.

Here’s the newtmgr code by the way: https://github.com/apache/mynewt-newtmgr

Ahh I think I know what’s going on here. My recommendation is to stay on 1.3.2 unless you guys have a programmer and are able to upgrade the bootloader. (This is something I recommend customers to do anyway since the default certificates for the bootloader are not secure.)