Cytron Technical Forum

Hi,

I've managed to get Raspberry Pi 4 working with Sim7600e similar to https://tutorial.cytron.io/2019/09/04/a ... 0e-module/.

However, the GPS coordinates received seems to be 30km off.

There are 3 mode for the GPS session:

1. standalone
2. UE-Based
3. UE-Assisted

However, managed to only get mode 1 & 2 working and still yielding the same result of 30km off.

For the 3rd mode, I did the following:

1. AT+CGDCONT= 1,"IP","diginet","0.0.0.0",0,0
2. AT+CGPSURL="supl.google.com:7276" # set agps url
3. AT+CGPSSSL=0 # set security mode
4. AT+CGPS=1,3 # start gps in assisted mode

But it will fail.

I am trying to improve the accuracy of the GPS. Anyway that I can achieve this?

Did further testing and collected more information. Switched the SIM7600e and GPS antennas to another spare set but getting same result. Hence, faulty device is ruled out.

Thank you. Solved.

The device is not the problem. Problem is knowing which part of the number needs decimal point shifting and the remainder needing to be in minutes. Lat and Long using similar formula but Lat needs 100 more.

Good to know that.