Snapdragon Flight cannot get GPS lock

leobrian · September 22, 2016, 3:32pm

Hi
I follow this page for update Snapdragon Flight Linux image and ADSP firmware
http://dev.px4.io/advanced-snapdragon.html

And I follow this page for building and updating px4

github.com

ATLFlight/ATLFlightDocs/blob/master/PX4.md

# PX4

This document describes the build and execution procedure for PX4 flight software on the [Snapdragon Flight](https://www.intrinsyc.com/vertical-development-platforms/qualcomm-snapdragon-flight) platform using drivers provided by Qualcomm.

1. [Prerequisites](#prerequisites)
1. [Building with upstream drivers](#building-with-upstream-drivers)
1. [Building with FC_ADDON drivers](#building-with-fc_addon-drivers)
  1. [Host Setup](#host-setup)
  1. [Building the Code](#building-the-code)
  1. [Installation on Target](#installation-on-target)
  1. [Execution](#execution)
1. [Known Issues and Limitations](#known-issues-and-limitations)
1. [More Information](#more-information)

## Prerequisites

To build the PX4 flight stack for Snapdragon Flight, you need to set up the build environment as described in [GettingStarted](GettingStarted.md).
You can optionally build and run [HelloWorld](https://github.com/ATLFlight/ATLFlightDocs/blob/master/HelloWorld.md) to test your setup.

## Building with upstream drivers

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After the update , Snapdragon Flight cannot get GPS lock (I use QGroundControl)

My Test Flow is:
1.Power on Snapdragon Flight. Starting the px4.
2.Laptop connect Snapdragon Flight wifi (SSID is Atlanticus_XXXXX)
3.Launch QGroundControl , it will connect to Snapdragon Flight automatically.
4.Wait for a moment. QGroundControl still show "No GPS Lock for Vehicle
5.And then PX4 print this message: “pxh> WARN [navigator] navigator: global position timeout” lately.

I have connect antenna on Snapdragon Flight J6 pin. Do I miss any setting?
The following image is the antenna .

Thanks for help.

silkstone · September 22, 2016, 11:36pm

Hey, did you ever find a solution to this? Connecting Ublox Neo M8N module to Pixracer I cannot get a single satellite count in QGC! Have left it outside for an hour plus - this has been the case for weeks now! Any suggestions?