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Raspberry Pi Robotic Projects - Third Edition by Richard Grimmett

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Accessing the USB GPS programmatically

Now that you can access the GPS device, let's work on accessing the data programmatically. Your project should now have the GPS device connected and have access to query the data via the serial port. In this section, you will create a program to use this data to discover where you are, then you can determine what to do with that information.

If you've completed the previous section, you should be able to receive the raw data from the GPS unit. Now you want to be able to do something with this data; for example, find your current location and altitude and then decide whether your target location is to the West, East, North, or South.

First, get the information from the raw data. As noted previously, the position ...

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