Beaglebone Black GPS LESSON 2: Sending Commands to the Adafruit GPS Module

Adafruit Ultimate GPS Connected to the Beaglebone Blak

In lesson 1 we showed you how to connect the Adafruit Ultimate GPS breakout board to the Beaglebone Black and how to read the NMEA sentences streaming off the GPS over the UART pins. In this lesson we will show you how to send commands to the GPS to better tailor its operation for our needs. There are a number of commands that can be sent to it. Some of the things we we can control are the baud rate it communicates at, and the rate that it takes and sends data. We can also influence which NMEA sentences it sends.  In this video we will go over the different commands we can use.

To review, you should connect the GPS as follows:

Adafruit Ultimate GPS connected to the Beaglebone Black Rev C Microcontroller

The video explains the code step-by-step, but here it is for your reference.

This code sets the GPS to communicate at baud rate of 57600, and set it to read and report 5 readings a second. It then sets the GPS to only report the $GPRMC and the $GPGGA sentences. It then constantly reads and reports the NMEA sentences.