Configure GPS so NMEA pipes through USB on Boot

[automocpy]

Hello,

I’d like to configure my rPi such that on every reboot, data automatically flows through the ttyACM3 serial port. My guess that the best way to do this is to write a script/service that calls the commands in https://ozzmaker.com/how-to-access-gps-nema-sentences-through-usb-on-the-berrygps-gsm/ on startup, similar to the way the ppp connection on boot is created.

I’ve found that I have to reconfigure the GPS such that it pipes data through ttyACM3 on each boot.

Is there already a way to do this?

Thanks,

Lucas

[automocpy]

And a follow up question to this. I’m trying to stream GPS data to intialstate.com per https://ozzmaker.com/real-time-gps-tracking-with-a-raspberry-pi/. Currently the stream is showing all data points as zero or nan, however I can pull valid GPS data through my own script. Here’s what GPSTracker.py outputs:

pi@automocpi:~/tools/gps_tracker $ python GPSTracker.py
GPS –> CPU time-> 17:15:10.997459 lat 0.0 lon 0.0 speed nan

Is there a way to point the script to look at /dev/ttyACM3?

Also – the script is hanging after I Ctrl+C it, is that normal?

Thanks

 

[Mark Williams]

To have it stream on each boot;

1.Create start-up script
nano ~/GPSthroughGSM.sh

2.Places your commands in the script. (You can echo the commands to the GSM com ports)
Add a sleep command at the start to allow the Pi enough time to boot.

#!/bin/sh
sleep 10
echo -e "AT+UGRMC=1\r\n" > /dev/ttyACM1
echo -e "AT+UGGLL=1\r\n" > /dev/ttyACM1
echo -e "AT+UGGSV=1\r\n" > /dev/ttyACM1
echo -e "AT+UGGGA=1\r\n" > /dev/ttyACM1
echo -e "AT+UGPRF=1\r\n" > /dev/ttyACM1

3.Change the permissions on the script
chmod +x ~/GPSthroughGSM.sh

4.Open rc.local, this is where you will tell the script to run on each boot
sudo nano /etc/rc.local

5.Right before exit 0 at the bottom enter in the location of your script with ‘&’ at the end so it doesn’t block startup
/home/pi/GPSthroughGSM.sh &

6. Reboot

Mark --OzzMaker.com --

[automocpy]

This worked great – thanks for the help. I added in this command as well:

AT+UGPS=1,1,67

[Author]

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