EG915N-EU GNSS Problem

IoT Modules LTE Standard Module
1

I have the EG915N-EU module. When trying the GNSS side, I could not get the location data successfully. where could the problem be?

AT+QGPS=1
AT+QGPS=1
OK

AT+QGPSGNMEA=“GSV”
AT+QGPSGNMEA=“GSV”
+QGPSGNMEA: $GPGSV,1,1,00,065
+QGPSGNMEA: $GLGSV,1,1,00,079
+QGPSGNMEA: $GAGSV,1,1,00,0*74
OK

AT+QGPSLOC=0
AT+QGPSLOC=0
+CME ERROR: 516

In addition that, I get the following data via USB.
“$GNRMC,V,N,V37
$GNGGA,0,00,99.99,56
$GNGSA,A,1,99.99,99.99,99.99,133
$GNGSA,A,1,99.99,99.99,99.99,331
$GNGSA,A,1,99.99,99.99,99.99,230
$GPGSV,1,1,00,065
$GAGSV,1,1,00,074
$GLGSV,1,1,00,079
$GNVTG,N2E
$GNRMC,V,N,V37
$GNGGA,0,00,99.99,56
$GNGSA,A,1,99.99,99.99,99.99,133
$GNGSA,A,1,99.99,99.99,99.99,331
$GNGSA,A,1,99.99,99.99,99.99,230
$GPGSV,1,1,00,065
$GAGSV,1,1,00,074
$GLGSV,1,1,00,079
$GNVTG,N2E
$GNRMC,V,N,V37
$GNGGA,0,00,99.99,56
$GNGSA,A,1,99.99,99.99,99.99,133
$GNGSA,A,1,99.99,99.99,99.99,331
$GNGSA,A,1,99.99,99.99,99.99,230
$GPGSV,1,1,00,065
$GAGSV,1,1,00,074
$GLGSV,1,1,00,079
$GNVTG,N2E
$GNRMC,V,N,V37
$GNGGA,0,00,99.99,56
$GNGSA,A,1,99.99,99.99,99.99,133
$GNGSA,A,1,99.99,99.99,99.99,331
$GNGSA,A,1,99.99,99.99,99.99,230
$GPGSV,1,1,00,065
$GAGSV,1,1,00,074
$GLGSV,1,1,00,079
$GNVTG,N2E
$GNRMC,V,N,V37
$GNGGA,0,00,99.99,56
$GNGSA,A,1,99.99,99.99,99.99,133
$GNGSA,A,1,99.99,99.99,99.99,331
$GNGSA,A,1,99.99,99.99,99.99,2*30”

The module which I am using is:
Quectel
EG915N
Revision: EG915NEUAPR03A04M16

How can I use GNSS?

2

516 means not fix.
It takes some time until gnss fix.
If it still not fix, please try send the AT
AT+QGPSPOWER=1
If it still not fix, please check the GNSS antenna.
The GNSS antenna reciever should be placed outdoor.

3

I apologize for the late reply.
I tried the command you gave but the module returned “error”.
When I examined the “ECx00x&EG800K&EG810M&EG91xN&EG950A Series AT Commands Manual”, I did not see this command. I connect the “YCGO011AA” antenna to the module externally. You can see my antenna connection in the picture below.

 AT+QGPSPOWER=1

AT+QGPSPOWER=1
ERROR

image
image507×677 47.4 KB

4

Could you take a picture of the antenna? Is it a passive antenna.

5

I’m using this antenna.

antenna-2
antenna-21920×2560 303 KB

6

The device should be placed outdoor.
The GNSS cannot fix indoor.

7

I did the GPS test for 10 minutes outside in an open area, but the results always came back as 0.

Do you have any other suggestions?

8

Have you tested the same location with other devices? I’m still mostly suspicious of the antenna.

9

I bought a different passive antenna and it worked fine. The problem was the antenna itself. Thank you for your help @Bean.Wang-Q .

10

Glad to hear that!
Thanks for the feedback.