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Oct 3, 2024
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Add displayio example #112

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70 changes: 70 additions & 0 deletions examples/gps_displayio_simpletest.py
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# SPDX-FileCopyrightText: 2024
# SPDX-License-Identifier: MIT

import time
import board
from adafruit_display_text.label import Label
from displayio import Group
from terminalio import FONT

import adafruit_gps

# import busio
# uart = busio.UART(board.TX, board.RX, baudrate=9600, timeout=10)
i2c = board.I2C() # uses board.SCL and board.SDA
# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector

# Create a GPS module instance.
# gps = adafruit_gps.GPS(uart, debug=False) # Use UART
gps = adafruit_gps.GPS_GtopI2C(i2c, debug=False) # Use I2C interface

# Turn on the basic GGA and RMC info (what you typically want)
gps.send_command(b"PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0")

# Set update rate to once a second 1hz (what you typically want)
gps.send_command(b"PMTK220,1000")


# Example written for boards with built-in displays
display = board.DISPLAY

# Create a main_group to hold anything we want to show on the display.
main_group = Group()

# Create a Label to show the readings. If you have a very small
# display you may need to change to scale=1.
display_output_label = Label(FONT, text="", scale=2)

# Place the label near the top left corner with anchored positioning
display_output_label.anchor_point = (0, 0)
display_output_label.anchored_position = (4, 4)

# Add the label to the main_group
main_group.append(display_output_label)

# Set the main_group as the root_group of the display
display.root_group = main_group


last_print = time.monotonic()

# Begin main loop
while True:
gps.update()

current = time.monotonic()
# Update display data every second
if current - last_print >= 1.0:
last_print = current
if not gps.has_fix:
# Try again if we don't have a fix yet.
display_output_label.text = "Waiting for fix..."
continue
# We have a fix! (gps.has_fix is true)
t = gps.timestamp_utc

# Update the label.text property to change the text on the display
display_output_label.text = f"Timestamp (UTC): \
\n{t.tm_mday}/{t.tm_mon}/{t.tm_year} {t.tm_hour}:{t.tm_min:02}:{t.tm_sec:02}\
\nLat: {gps.latitude:.6f}\
\nLong: {gps.longitude:.6f}"