# No lock with GPS

Source: https://forum.modalai.com/topic/1283/no-lock-with-gps
Category: Flight Core and Legacy VOXL (https://forum.modalai.com/category/9/flight-core-and-legacy-voxl)
Tags: voxl-cam
Posted: 2022-09-02 02:29:32 UTC by Guest
Replies: 2 · Views: 588

## Guest · 2022-09-02 02:29:32 UTC

Hello,
 My system image on VOXLCAM is 3.8.0 and px4 firwmare version is Modalai 1.11.3-0.2.3. I bought ublox M8N GPS from [here](https://www.modalai.com/products/replacement-gps-mag-for-voxl-m500-pixhawk-4-secondary-gps). I wanted to try GPS + VIO based ADFS flight in outdoor and indoor environment. 
I am unable to get 3D fix for my GPS. I have correctly set parameter GPS_1_CONFIG to GPS_1 and also connected GPS to J10 connector on flightcore. My EKF2_AID_MASK is set to '1' for GPS only flight. I am constantly getting BLUE LED blinking which means no GPS fix. I am trying this outdoor with clear sky view.

Here is my Nuttx QGC logs and GPS status
![Screenshot from 2022-09-02 07-56-16.png](https://forum.modalai.com/assets/uploads/files/1662085722610-screenshot-from-2022-09-02-07-56-16.png) 

I also tried cold, warm and hot reset but without any luck.
Any help in further debugging would be highly appreciated.

## Reply by Chad Sweet (ModalAI staff) · 2022-09-02 02:53:32 UTC

The GPS not getting a fix doesn't really have anything to do with Flight Core or other VOXL configuration

Since it is a cold start in a new location, it can take minutes to initialize the first time. Otherwise do you have electromagnetic interference somewhere?

Can you move the GPS further from any electronics?

## Reply by Guest · 2022-09-02 13:56:31 UTC

@Chad-Sweet I have GPS mounted over VoxlCam hardware with distance of approximately 10 cms. I also tried moving GPS towards backside similar to seeker but still I wasn't able to get fix. I have waited for an hour to get fix but still facing issues. Do I need to configure GPS module by any chance with u-center : https://www.u-blox.com/en/product/u-center ?
As far as electromagnetic interference is concerned I don't think there is anything in very close vicinity of GPS.