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Updated How to use the 4G extension (markdown)

GNU 2024-02-20 18:52:06 -08:00
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How-to-use-the-4G-extension.md

@ -104,3 +104,27 @@ then if everything goes right, you will see **ppp0** in `sudo ifconfig` , which
The connectivity of 4G may vary in different countries around the world, so please make appropriate adjustments based on the situation of your ISP operator, which may require some Linux-related skills.
## GPS
We use AT commands to get GPS data
### start gps
```
cpi@raspberrypi:~ $ echo -en "AT+CGPS=1\r\n" | sudo socat - /dev/ttyUSB3,crnl
OK
```
### wait about one minute depend on the gps signal,get gps data
```
cpi@raspberrypi:~ $ echo -en "AT+CGPSINFO\r\n" | sudo socat - /dev/ttyUSB3,crnl
+CGPSINFO: 3036.995500,N,12016.782856,E,200224,082124.0,40.5,0.0,
OK
```
### close gps
```
cpi@raspberrypi:~ $ echo -en "AT+CGPS=0\r\n" | sudo socat - /dev/ttyUSB3,crnl
```
make sure the **GPS antenna** is connected to the **GNSS** port on 4G extension