Example of simultaneous GPS and LTE operation?

[jwade@scg]

Is there an example of simultaneous GPS and LTE operation available? I'm having trouble getting this working and wanted to ensure I hadn't missed anything trying to set it up.

[Carl Richard]

Hello Jwade!

There has been a lot of back and forth with the simultaneous GPS and LTE operation. The latest modem firmware added support for this, but the NCS still lags a little behind.

There is however a pull request for NCS that you can take a look at. It has working, simultaneous GPS for the Asset Tracker example. You can find it here. This is not finalized, so there could be some issues. 

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Some notes:
- As stated in the documentation for GPS simultaneous operation is possible by activating eDRX or PSM(power saving mode) on the modem.  Though PSM is not supported by the iBasis card included with the DK.

- When setting network mode the AT command must be like this for LTE-M and NBIOT respectively:

 

LTE-M : AT%XSYSTEMMODE=1,0,1,0

NBIOT : AT%XSYSTEMMODE=0,1,1,0

- Again; ensure that you have the most recent modem firmware.

- Lastly: there are issues with the GPS antenna with some DKs including and preceding 0.8.2. 

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Hope this helps!

- Carl R.