GSP seems not working

[TigerD]

Hi,

I compiled and downloaded GPS sample, I got the following messages:

    Tracking: 0 Using : 0 Unhealthy : 0

Seconds since last fix: 600

Scanning [ _ ]

Over 10 minutes, it has not received any GPS data. Did I miss some thing?

The gps project running on nRF9160 Development Board.

Thank you,

David

[Carl Richard]

Hi, David!

Which version of the DK are you using? GPS is only supported for 0.8.5 and above. 

Note that you will achieve best performance for the GPS outside(no roof), on a flat surface. 

Hope this helps!

-- Carl Richard

[TigerD]

Hi Carl,

The dev board 0.8.3.

But the gps messages are read with asset tracking example.

But the GPS position doesn't reflect the true position. The position read from the modem as

6325.330N, 01026.200E

Is the location as Nordic Semiconductor Header Quarter?

Thank you,

David

[TigerD]

Hi Carl,

I want to confirm with you that the modem version 1.0.1 doesn't support concurrency of LTE and GPS.

It is not efficient and error-prone to the system without concurrency. If this is true, not supported on the current version of modem, do you have any target plan that it will be supported in the near future?

Thank you,

David

[Carl Richard]

Hello again, David!

TigerD said:

The dev board 0.8.3.

As mentioned you must have DK 0.8.5 or higher for on board GPS support. I recommend that you get hold of an external antenna, as described here. 

TigerD said:

Is the location as Nordic Semiconductor Header Quarter?

That's right. The asset tracker example on the V1.0.0 tag uses spoofed GPS data. 

------

TigerD said:

I want to confirm with you that the modem version 1.0.1 doesn't support concurrency of LTE and GPS.

The modem version 1.0.1 does support concurrent use of GPS and LTE, given that the modem is running in PSM(Power Saving Mode). Concurrency using eDRX will also be possible in the future I believe. 

Hope this helps! 

[TigerD]

Hi Carl,

Thank you for your prompt reply.

One more question: I found there is similar dev board with LTE-NB/GPS functionality:

Nordic Semiconductor Thingy:91 Multisensor Prototyping Kit

Compare to nRF9160-DK: both support LTE-NB/GPS. Which is a better board (nRF9160-DK or Thingy 91)? For Thingy 91: which revision supports GPS and LTE?

Last time, we got DK, but not 0.8.5 revision of DK. I want to make sure that we are getting the right board.

Thank you,

David