Datasheet

ManualsBrandsAdafruit ManualsAdafruitUltimate GPS FeatherWing

By default this example expects to log GPS NMEA sentences to a file on the internal storage system at /gps.txt. New

sentences will be appended to the end of the file every time the example starts running.

If you'd like to instead write to the SD card take note to uncomment the appropriate lines mentioned in the comments:

# Simple GPS datalogging demonstration.

# This actually doesn't even use the GPS library and instead just reads raw

# NMEA sentences from the GPS unit and dumps them to a file on an SD card

# (recommended) or internal storage (be careful as only a few kilobytes to

# megabytes are available). Before writing to internal storage you MUST

# carefully follow the steps in this guide to enable writes to the internal

# filesystem:

# https://learn.adafruit.com/adafruit-ultimate-gps-featherwing/circuitpython-library

import board

import busio

# Path to the file to log GPS data. By default this will be appended to

# which means new lines are added at the end and all old data is kept.

# Change this path to point at internal storage (like '/gps.txt') or SD

# card mounted storage ('/sd/gps.txt') as desired.

LOG_FILE = '/gps.txt' # Example for writing to internal path /gps.txt

#LOG_FILE = '/sd/gps.txt' # Example for writing to SD card path /sd/gps.txt

# File more for opening the log file. Mode 'ab' means append or add new lines

# to the end of the file rather than erasing it and starting over. If you'd

# like to erase the file and start clean each time use the value 'wb' instead.

LOG_MODE = 'ab'

# 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

# If writing to SD card customize and uncomment these lines to import the

# necessary library and initialize the SD card:

#SD_CS_PIN = board.SD_CS # CS for SD card (SD_CS is for Feather Adalogger)

#import adafruit_sdcard

#spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)

#sd_cs = digitalio.DigitalInOut(SD_CS_PIN)

#sdcard = adafruit_sdcard.SDCard(spi, sd_cs)

#vfs = storage.VfsFat(sdcard)

#storage.mount(vfs, '/sd') # Mount SD card under '/sd' path in filesystem.

# 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)

# Main loop just reads data from the GPS module and writes it back out to

# the output file while also printing to serial output.

with open(LOG_FILE, LOG_MODE) as outfile:

while True:

sentence = uart.readline()

print(str(sentence, 'ascii').strip())

outfile.write(sentence)

outfile.flush()