MC7455 GPS Setup

IoT Modules MC/EM Series
1

Hello,

I’ve been trying to obtain GPS data from the MC7455 modem, however I’ve run into some trouble. When I try to track using the Skylight application (build 4442) it just gets stuck on acquiring location. I also see data being posted on the NMEA port, however when I try to parse it with one of the online NMEA parsers it turns out that it doesn’t really contain any information.

So I decided to try and see if I can get it fix using some of the AT commands. I’ve set
AT!CUSTOM=“GPSENABLE”,1
AT!CUSTOM=“GPSLPM”,0
as well as
AT!GPSAUTOSTART=1
However there’s still no difference. If I try !GPSTRACK or !GPSFIX I just receive an ERROR.

I also tested the antenna that I’m currently using with another modem and it worked fine.

Any ideas?

2

Hello, Skylight is not really being supported as windows MBIM CM is now what is being used.

Please try this from an AT terminal session:

  1. AT!GPSAUTOSTART=1,1,255,100, 1
  2. Make sure you have enabled the AT+WANT=1 for an active antenna
  3. You antenna has a clear view for the sky
  4. AT!RESET
  5. Type AT!GPSSATINFO? several times to start showing the satellite fixes

See if this works over using Skylight.

Jon

3

Hi Jon,

I tried what you’ve suggested, however to no avail. I don’t really mind if skylight isn’t working, what’s important is to receive the correct information on the NMEA port. I’m also attaching a screenshot if that’s helpful.

upload
upload.PNG1873×924 195 KB

4

Actually after I restarted the PC it finally worked.
Thanks.

5

Yes, I see it now worked and you usually need three or more satellites to be in view to get the accurate positioning and NMEA strings. Jon