In this article, we will explore the topic of gpsd-clients and how to use them on Raspberry Pi. GPS (Global Positioning System) is a widely used technology for determining the location of a device. gpsd-clients is a collection of command-line utilities that interact with the gpsd daemon, which provides access to GPS data.

Using gpsd-clients on Raspberry Pi can be beneficial for various projects that require GPS data, such as navigation systems, tracking devices, and location-based applications. By utilizing the gpsd daemon and its clients, you can easily retrieve and process GPS information on your Raspberry Pi.

To align this topic with the Raspberry Pi environment, we need to ensure that the gpsd daemon is installed and configured correctly. The gpsd daemon is available in the default Raspbian repositories, so you can easily install it using the package manager. Once installed, you can connect a GPS receiver to your Raspberry Pi and start using gpsd-clients to access the GPS data.

Examples:

1. Install gpsd daemon:

   sudo apt-get update
   sudo apt-get install gpsd gpsd-clients

2. Connect the GPS receiver to Raspberry Pi via USB.

3. Check if the GPS receiver is detected:

   ls /dev/ttyUSB*

4. Configure gpsd to use the correct device:

   sudo dpkg-reconfigure gpsd

5. Start the gpsd daemon:

   sudo systemctl start gpsd

6. Verify the status of the gpsd daemon:

   sudo systemctl status gpsd

7. Use gpsd-clients to access GPS data:

   • To view raw GPS data:

     cgps -s

   • To view satellite information:

     gpsmon

   • To extract GPS data in JSON format:

     gpspipe -w | grep -m 1 TPV | jq '.'

   • To obtain latitude and longitude values:

     gpspipe -w | grep -m 1 TPV | jq '.lat, .lon'

   • To continuously monitor GPS data:

     xgps