If I have Digital Matter's Yabby Edge Cellular devices and would be interested in knowing and reporting their locations, is there any sensible way to achieve that other than using Digital Matter's Location Engine service (for a fee)?
The devices will have SIM cards installed and the necessary server connection configured so that I'd have full access to the data they report. So my concern is "only" about transforming that raw data from the devices to more human-friendly location information.
This particular model has Semtech's LR1110 chip inside, so the location data includes GNSS, WiFi and cell tower information. I think I could use existing third-party services to get a rough location based on the wifi and cell tower data, but haven't really found any good spec to interpret the raw GNSS data (i.e. the "NAV message" the chip creates, which is some kind of a binary format).
Based on my online research, it's looking more and more likely that all implementations that exist for this purpose actually use Semtech's GNSS solver in the background, including the afore-mentioned Location Engine by DM. So there might not even be a generally available spec for the format — but I'd be happy to be proven wrong.
Has anyone done something like this successfully?
Addition: I realized I'll have direct access only to the payload from the Yabby device which I believe doesn't send the chip's NAV message in its original form (although I might be wrong). So my first task is to get the raw GNSS data from that payload.
