69 lines
1.7 KiB
Python
69 lines
1.7 KiB
Python
# SPDX-FileCopyrightText: 2019 Dave Astels for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""
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IoT environmental sensor node.
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Adafruit invests time and resources providing this open source code.
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Please support Adafruit and open source hardware by purchasing
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products from Adafruit!
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Written by Dave Astels for Adafruit Industries
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Copyright (c) 2019 Adafruit Industries
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Licensed under the MIT license.
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All text above must be included in any redistribution.
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"""
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import time
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import adafruit_gps
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import adafruit_logging as logging
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logger = logging.getLogger('main')
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if not logger.hasHandlers():
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logger.addHandler(logging.StreamHandler())
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class Gps(object):
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def __init__(self, uart):
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self._gps = adafruit_gps.GPS(uart, debug=False)
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self._latitude = 0
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self._longitude = 0
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def begin(self):
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self._gps.send_command(b'PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0')
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self._gps.send_command(b'PMTK220,1000')
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def get_fix(self):
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try:
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logger.debug('Calling gps update')
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self._gps.update()
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logger.debug('Back from gps update')
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while not self._gps.has_fix:
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# Try again if we don't have a fix yet.
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logger.debug('Waiting for fix...')
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time.sleep(0.1)
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self._gps.update()
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return True
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except UnicodeError:
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return False
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def read(self):
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logger.debug('Reading GPS')
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self._latitude = self._gps.latitude
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self._longitude = self._gps.longitude
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@property
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def latitude(self):
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return self._latitude
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@property
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def longitude(self):
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return self._longitude
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