How can I tell if iCMTGIS PRO is using the Trimble R1, or the iPad built-in GPS?
February 21, 2023 Leave a comment
(This is an updated version of an older article that we posted in 2014.)
The iOS devices can only work with GPS receivers approved by Apple.
iCMTGIS PRO is able to get the NMEA data stream directly from a few external GPS receivers, such as the EOS Arrow Gold, the Geneq SXBlue Platinum, Bad Elf GPS and Dual XGPS-150A. For other compatible GPS receivers, it gets the data from the iOS Location Service. All of our other apps only obtain GPS data from the Location Service of the iOS device.
To use the external GPS, make sure you have turned on Location Services under Privacy. Also, on the Location Services page, find iCMTGIS PRO and turn the switch on to make Location Service available for this app. (Do this for the app you are using, such as iCMTGIS II, iGPSGIS II, Utility Data Collection, Stakeout iCMT, Farming GPS GIS, Forester GPS GIS, etc.)
For iOS devices with built-in GPS, how would one know if the app is using the external GPS or the built-in GPS?
The short answer is: Your iOS device will serve the GPS data from the external GPS (such as the Trimble R1) when the internal GPS is not actively being used.
Not to leave you in the fog, here is the long answer:
- To make use of GPS, Location Service must be turned on under Settings and also turned on for the specific app you are using.
- The iOS device will automatically use the internal GPS if you turn on GPS within an app while no external GPS is connected.
- When any app is using the internal GPS, iOS cannot work with an external GPS connected to the device.
- Therefore, to make use of the connected external GPS, you will want to turn off GPS from all running GPS apps (including the one you are actively using) then turn on GPS within the app you are actively using.
- It will also help to turn on Airplane mode then turn on Bluetooth and make sure Location Service is active for the app. Then, the next time you turn on Airplane mode, Bluetooth will not be automatically turned off. In newer devices, Bluetooth will not be automatically turned off when you turn on Airplane mode.
- When Bluetooth connection is lost, then iOS uses the internal GPS. This could happen randomly.
Usually, the first time you turn on GPS in the app, the device will connect with the external GPS. So to make sure the device is connected with the external GPS, turn off GPS (from the menu bar of the app such as iCMTGIS PRO) then turn it on again. Or, reconnect the Bluetooth GPS. The status maybe shown as “Connected”, but just tap on it to make it reconnect again.
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