The #XGPS command controls the GNSS.

Hello Carey, 

but my uart tool receive as blow, and i don't seem the GPS information output as the expamle. why?

Two possible reasons: 

1. You have to switch from Segger RTT to the UART console.
2. You actually are not getting any fix. Is the device placed in an environment where it should be able to calculate a fix, preferably outside under the open sky without any obstacles close by, like high buildings that could create disturbances? 

Regards, 

Markus 

Hello Carey, 

but my uart tool receive as blow, and i don't seem the GPS information output as the expamle. why?

Two possible reasons: 

1. You have to switch from Segger RTT to the UART console.
2. You actually are not getting any fix. Is the device placed in an environment where it should be able to calculate a fix, preferably outside under the open sky without any obstacles close by, like high buildings that could create disturbances? 

Regards, 

Markus 

Hi, I move to the roof top platfom of my build (25 floors), than i can see the sky in each position, Now i test below gps at command , and i have wait more than 10 minutes at three different place. the rezult still don't have anything expcet  'OK"

bleow is my 91DK board and command detail.