Sending Assisted GNSS (A-GNSS) to Bangle 2 GPS (AT6558)

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pelrun

The ephemerides are only valid for about 4 hours, so an upload at midnight is probably not too useful.

@Mark_M, the docs explicitly say CFG commands require waiting for an ACK, all others do not. The AGPS data only uses MSG commands. This is probably because the CFG commands modify flash settings, which are a lot slower than anything that just goes into RAM.

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fanoush in reply to @pelrun
so an upload at midnight is probably not too useful.

some agps documents describe the procedure how to find out that gps has stale data and needs it, attached translations.

the second one has chapter "when do you need AGNSS" with enabling status NMEA message for this and " If the time stamp is valid (non-zero) and the number of valid ephemeris is large (more than 8), there is no need to download the AGNSS"

2 Attachments
- Long-term ephemeris (LTE) use document of Zhongke Microelectronics.pdf
- Zhongke Micro AGNSS Solution.pdf

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Mark_M in reply to @fanoush

fanoush. This doc is about LTE. They supposed to be loaded via AID class. The .bin data we load via MSG-GPS* is probably not LTE. Though MSG-GPSEPH is ephemerides. Short term ones? Needs to check what that $PCAS06,L*67\r\n shows before and after .bin loading.

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