is there a function just to return this in my code or do i need to rely on the periodic loc publish?
From device firmware, use getLocation.
it returns 0,0 with
LocationPoint location;
Edge::instance().locationService.getLocation(location);
Is the locked field non-zero? If not, then the GNSS does not have a lock yet, so there is no location to return.
If you want the location using Wi-Fi or cellular geolocation instead of GNSS, then you do need to subscribe to and process the loc-enhanced event. That will use an additional data operation for each location publish to send the location fusion data back to the device.
Any idea why it wouldn't have a GNSS lock if it's just in my office with strong data signal etc
I think I'd like to avoid using the loc event as that will significantly eat into my data operations
It's rare that you'll ever be able get a GNSS lock inside without an external antenna in a south-facing window. You need to be able to see several satellites overhead, which is nearly impossible inside.
ok well that wont work likely, can i piggy back off the loc event, ie add information i am interested in to this event and make it be published more? or another way of getting longitude / latitude using lte rather than loc-enhanced event
You add custom information to the loc event and use the loc-enhanced for location fusion to add in cellular and Wi-Fi geolocation data, if available.
You would still need a cloud service for getting location for LTE not using location fusion. And since it will be a single tower location estimate, it will have a radius of uncertainty of up to 10000 meters.
on the docs it states lte is significantly more accurate for location. what function would i use to test it in my firmware?
LTE geolocation is not a function of the cellular modem. You can use the cellular_global_identity function to get the cell identifier, location area code, mcc. and mnc of the tower you're connected to. You then need to use a cloud-based service like Google geolocation to convert that into coordinates. If you do it using publish and subscribe, that will use as many data operations as just using built-in geolocation, and a lot more work. Also you will likely have to pay for the geolocation service.
Ideally I would use the built in getLocation()
Does the monitor one kit normally include an antenna? You're saying it should work indoors with an antenna, correct?
Isn't there an antenna on the board already?
The Monitor One includes an active GNSS antenna in the enclosure. It will not work inside unless put it in a south-facing window with no obstructions and a clear line of sight to the sky. For example, no trees or buildings in the way.
Ideally it should only be used outside as GNSS operation inside will be unreliable.
But isn't the intention that this be mounted inside a tractor (at least that is what I am using it for). How can I guarantee which direction it will be facing at all times?
That's different - there isn't an entire building over it. If you follow the instructions in the Monitor One datasheet for mounting in the proper orientation, it should be able to see enough satellites as long as you mount it in a location that can see through windows. For example, don't install it under the dashboard; it will not work well there.
If you do need to mount the Monitor One in a closed compartment, you should use an external active GNSS antenna. There is a SMA jack on the bulkhead panel that can be used for this purpose, though you need to physically change the connector on the Monitor One carrier board to use it.
ok thanks i have installed the external antenna by connecting the gps port cable into where the cirocomm device was plugged in (grey cable) and the device is outside any idea why it still returns a zero when i use this function
double resolveLocation(String value)
{
Edge::instance().locationService.getLocation(location);
return location.latitude + location.longitude;
}
i am just returning the sum as a quick indicator to see if either are none zero
to give a bit more context the UBX_NAV_SET serial log states 58 sats in almanac and 1 sats in view
You don't have enough satellites in view yet. You need about 8 before you can get a GNSS lock.
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