Datasheet

Next the GPS module is imported:

Now a serial UART (https://adafru.it/BuT) is created and connected to the serial port pins the GPS module will use, this

is the low level transport layer to communicate with the GPS module:

Once a UART object is available with a connected GPS module you can create an instance of the GPS parsing class.

You need to pass this class the UART instance and it will internally read new data from the GPS module connected to

it:

Before reading GPS data the example configures the module by sending some custom NMEA GPS

commands (https://adafru.it/qif) that adjust the amount and rate of data. Read the comments to see some options for

adjust the rate and amount of data, but typically you want the defaults of core location info at a rate of once a second:

If you want you can send other custom commands to the GPS module with the send_command function shown

import adafruit_gps

# Define RX and TX pins for the board's serial port connected to the GPS.

# These are the defaults you should use for the GPS FeatherWing.

# For other boards set RX = GPS module TX, and TX = GPS module RX pins.

RX = board.RX

TX = board.TX

# Create a serial connection for the GPS connection using default speed and

# a slightly higher timeout (GPS modules typically update once a second).

uart = busio.UART(TX, RX, baudrate=9600, timeout=3000)

gps = adafruit_gps.GPS(uart)

# Initialize the GPS module by changing what data it sends and at what rate.

# These are NMEA extensions for PMTK_314_SET_NMEA_OUTPUT and

# PMTK_220_SET_NMEA_UPDATERATE but you can send anything from here to adjust

# the GPS module behavior:

# https://cdn-shop.adafruit.com/datasheets/PMTK_A11.pdf

# Turn on the basic GGA and RMC info (what you typically want)

gps.send_command('PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0')

# Turn on just minimum info (RMC only, location):

#gps.send_command('PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0')

# Turn off everything:

#gps.send_command('PMTK314,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0')

# Tuen on everything (not all of it is parsed!)

#gps.send_command('PMTK314,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0')

# Set update rate to once a second (1hz) which is what you typically want.

gps.send_command('PMTK220,1000')

# Or decrease to once every two seconds by doubling the millisecond value.

# Be sure to also increase your UART timeout above!

#gps.send_command('PMTK220,2000')

# You can also speed up the rate, but don't go too fast or else you can lose

# data during parsing. This would be twice a second (2hz, 500ms delay):

#gps.send_command('PMTK220,500')