How to read directly from Serial1? (baby steps into CASIC)

@HughB I am looking into CFG-PRT, there is interesting item

Remark [1]: Protocol control mask
Bit describe
B0 1=Binary protocol input
B1 1=Text protocol input
B4 1=Binary protocol output
B5 1=Text protocol output

to me it looks like a way to configure the chip to work in CASIC or in NMEA, or in both. It looks like the chip is preconfigured to work in Text protocol (NMEA) only. There is CAS10 command that can do factory default to restart. That may turn on text and binary both.