since this is not related to any specific Bangle App https://github.com/espruino/Espruino/issues would be better place for this issue (next time?)

I've just moved this issue... But thanks! That's a pain.

So just to be clear - I guess we have two options here?

• Disable the UBX handling for Bangle.js 2
• Replace the UBX handler with a CASIC handler for Bangle.js 2

I guess the second is preferable, we just have to convert the JS code in that thread to C

No reply so just doing the first as it's easier

not sure but does this change mean that CASIC data will be now available via GPS-raw event?
if not then reading Serial1 directly will still not work due to this line

Good point. You'll still get the GPS-raw but it'll be newline-terminated. It's probably not ideal but should be a definite improvement over what was happening before!

edit: and yes, not Serial1.data