How to write to Bangle2 GPS?

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Mark_M

Yes, I also found couple of docs on web. Chinese ones and translated. Like Multimode_satellite_navigation_receiver_cn.pdf
Or this one http://wless.ru/files/GPS/Neoway/G7A/Neoway_G2_and_G7A_Commands_Manual_V1_0.pdf

I use CAS commands from it.
Yes it is possible to turn on/off types of NMEA messages, change frequency of them, select constellations etc.
Regarding turning on/off types of NMEA messages (CAS03) the chip that is in Bangle2 is configured slightly different then it is documented in the docs I've found. It would be nice to find the doc for the actual chip/firmware.

I am going to create some Setup GNSS app or at least an example in Wiki.

Also I am looking to try CASIC binary format instead of NMEA for logging, probably it will be more efficient from space and performance perspective.

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fanoush in reply to @Mark_M
Regarding turning on/off types of NMEA messages (CAS03) the chip that is in Bangle2 is configured slightly different then it is documented in the docs I've found.

just checked my comments I no longer remember what they mean exactly and there are more columns for PCAS03 than documented in chinese doc, at least 12
```
// PCAS03,0,0,0,0,0,0,0 - frequency of GGA,GLL,GSA,GSV,RMC,VTG,ZDA in periods set by PSCAS02 (0-9)
// "PCAS03,,,,,,,,,1,," GNHV
// "PCAS03,,,,,,,,,,,1" GPSTXT,01,01,02,MS=3,9,28855810,23,0,00000000,20,1,00000008
```
the B5 firmware has a string "$PCAS03,0,0,0,0,0,0,0,0,0,0,0,0* and method that based on bits passed to it rewrites 0 to 1 before sending

EDIT: oh your second pdf has even more columns there, great :-) The Chinese one has only 8 fields there.

EDIT2: I had old chinese version they updated it in 2020 and there are more fields there too

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