Source code for

import logging
from datetime import datetime
import pytz
from astropy.time import Time
import requests

from .station import WeatherStation

log = logging.getLogger(__name__)

[docs]class McDonaldLocke(WeatherStation): """The McDonaldLocke weather station reads current weather information from the Mt. Lock weather page at It does not require any configuration. """
[docs] def create_sensors(self): """Entry point for creating sensors for this station. Sensors created by this station are: - temp - humid - winddir - windspeed - particles - rain """ self._add_sensor('temp') self._add_sensor('humid') self._add_sensor('press') self._add_sensor('winddir') self._add_sensor('windspeed') self._add_sensor('particles') self._add_sensor('rain')
[docs] def update(self): """Entry point for updating sensor values for this station. This method reads the Mt. Locke weather page and extracts the latest values."""'Updating McDonald Locke station %s...' % self._station.code) # do request r = requests.get('') # check code if r.status_code != 200: logging.error('Could not connect to McDonald weather station.') return # split lines lines = [l.strip() for l in r.text.split('\n')] # do checks # 1st line is title if 'Mt. LOCKE LOCAL WEATHER' not in lines[0]: log.error('First line does not contain "Mt. LOCKE LOCAL WEATHER') return # 2nd line is date if 'Current Date GMT' not in lines[1]: log.error('No date given in response from server.') return # strip line and capitalize first letter of month date = lines[1][18:21] + lines[1][21].upper() + lines[1][22:] # compare with today now = datetime.utcnow() if now.strftime('%d-%b-%Y') != date: log.error('Weather data from server not for today.') return # 3rd, 4th, and 5th lines if lines[2] != '|TEMP.|HUMID|DEW PT.| BAROM | WIND_DIR | WIND SPEED | PARTICLE | RAIN': log.error('Column headers do not match.') return if lines[3] != 'TIME | avg | avg | avg | PRESS | avg stdev| avg max min | COUNT | Y/N': log.error('Column headers do not match.') return if lines[4] != '-[GMT]-|-[F]-|-[%]-|--[F]--|[In.Hg]|---[Az]---|----[MPH]----|--[ppcf]--|[on/off]': log.error('Units do not match.') return # finally, 6th line is current weather s = [l.strip() for l in lines[5].split('|')] # time is easy, just concatenate date and time time = Time(now.strftime('%Y-%m-%d') + ' ' + s[0] + ':00').to_datetime(pytz.UTC) # convert temp from °F to °C try: temp = (float(s[1]) - 32) / 1.8 except ValueError: temp = None # humidity try: humid = float(s[2]) except ValueError: humid = None # dew point, given in °F, convert to °C try: dew_pt = (float(s[3]) - 32) / 1.8 except ValueError: dew_pt = None # pressure, convert from inHg to hPa try: press = float(s[4]) * 33.86389 except ValueError: press = None # wind dir, given as "avg ~ std" try: tmp = s[5].split('~') wind_dir = float(tmp[0]) except ValueError: wind_dir = None # wind speed, given as "avg max min", convert from mph to kmh try: tmp = s[6].split() wind_speed = float(tmp[1]) / 1.609344 except ValueError: wind_speed = None # particle count, convert from particles per ft³ to particles per m³ try: particles = float(s[7]) * 3.2808 ** 3 except ValueError: particles = None # rain rain = s[8] == 'Y' # got all values, now add them self._add_value('temp', time, temp) self._add_value('humid', time, humid) self._add_value('press', time, press) self._add_value('winddir', time, wind_dir) self._add_value('windspeed', time, wind_speed) self._add_value('particles', time, particles) self._add_value('rain', time, rain)
__all__ = ['McDonaldLocke']