nRF9160DK UART-controlled GPS

[bc_metco]

nRF SDK version is 1.5.1

upgrade modem fw to 1.3.0

Is there any way to do software reset on GPS modem? I have ran the gps example and I notice that "printk" sends everything via UART TX. Is there any function/API to utilize the RX data on the same UART port? by doing that I want to do software restart (with different mode, e.g. hot/warm/cold restart) on the GPS modem only. 

I wasn't sure it is the proper method to do GPS modem restart, is there any method already been defined?

[Albrecht Markus Schellenberger]

Hello Bo,

you can start and stop the GPS socket. Additionally you can delete GNSS data to trigger cold/warm starts.

Just out of curiosity: why do you want to reset the modem?

Regarding the UART: Yes, you can use the RX interface of the UART peripheral to communicate with the device. The Peripheral UART sample might be of interest for you here, as it shows the usage of the API.

I hope this will help you!

Regards,

Markus

[bc_metco]

Hi Markus, 

The reason I want to reset the modem is to test the GPS module in a fully automatic environment, with proper reset mode been set up, I will collect TTFF data from the test bench.

I thought a controllable reset (via UART) should be a standard feature, since all GPS module manufacturers (uBlox, Qectel, etc) have it ready with their products. e.g. ublox has its own UBX protocol (thru serial comms) to support the configuration.

the UART example you mentioned is for BlueTooth module and it use NUS service. I wonder if the "printk" function in gps example also uses NUS service? Is there any conflict if I initialized the same UART port with printk?