blinkt-weather.py

## blinkt-weather.py
import json, time, os.path
import blinkt, requests

status_colors = {'current':[1,1,1],'high':[1,0,0],'low':[0,0,1],'precip':[0,1,0]}

blinkt.set_clear_on_exit()
blinkt.set_brightness(.1)

def getForecast(key,lat,lng):
    url = 'https://api.darksky.net/forecast/' + key + '/' + str(lat) + ',' + str(lng)

    stl = requests.get(url)

    return stl.json()

def getTempColor(temp):
    if temp <= 0:
        color = [10,0,30]
    elif temp <= 32:
        color = [0,0,30]
    elif temp <= 50:
        color = [0,15,30]
    elif temp <= 65:
        color = [0,30,0]
    elif temp <= 80:
        color = [60,20,0]
    elif temp <= 95:
        color = [60,10,0]
    else:
        color = [30,0,0]
    return color

def getStoplightColor(prob,low,high):
    if prob < low:
        color = [0,30,0]
    elif prob < high:
        color = [60,20,0]
    else:
        color = [30,0,0]
    return color

def showSevenDayTemps(temps, which):
    blinkt.clear()
    # set status light
    color = status_colors[which]
    blinkt.set_pixel(7,color[0],color[1],color[2])
    for i in range(7):
        color = getTempColor(temps[i])
        blinkt.set_pixel(i,color[0],color[1],color[2])
    blinkt.show()

def showSevenDayPrecip(precip, which):
    blinkt.clear()
    # set status light
    color = status_colors[which]
    blinkt.set_pixel(7,color[0],color[1],color[2])
    for i in range(7):
        color = getStoplightColor(precip[i],.25,.75)
        blinkt.set_pixel(i,color[0],color[1],color[2])
    blinkt.show()

def showCurrent(data):
    blinkt.clear()
    # set status light
    color = status_colors['current']
    blinkt.set_pixel(7,color[0],color[1],color[2])
    # get current temp (use color scale)
    color = getTempColor(data['temp'])
    blinkt.set_pixel(0,color[0],color[1],color[2])
    # daily high and low (use color scale)
    color = getTempColor(data['low'])
    blinkt.set_pixel(1,color[0],color[1],color[2])
    color = getTempColor(data['high'])
    blinkt.set_pixel(2,color[0],color[1],color[2])
    # precip (red, yellow, green)
    color = getStoplightColor(data['precip'],.25,.75)
    blinkt.set_pixel(3,color[0],color[1],color[2])

    blinkt.show()

def prepData(forecast):

    data = {'lows': [], 'highs': [], 'precip': [], 'current': {}}

    for day in forecast['daily']['data']:
        data['lows'].append(day['apparentTemperatureLow'])
        data['highs'].append(day['apparentTemperatureHigh'])
        data['precip'].append(day['precipProbability'])

    curr_temp = forecast['currently']['apparentTemperature']
    data['current']['temp'] = curr_temp
    data['current']['low'] = curr_temp
    data['current']['high'] = curr_temp

    for hour in forecast['hourly']['data'][:24]:
        if hour['apparentTemperature'] < data['current']['low']:
            data['current']['low'] = hour['apparentTemperature']
        if hour['apparentTemperature'] > data['current']['high']:
            data['current']['high'] = hour['apparentTemperature']

    data['current']['precip'] = forecast['daily']['data'][0]['precipProbability']

    return data


forecast = None
cur_time = time.time()
interval = 5*60
delay = 2

while True:
    if forecast is not None and (cur_time + interval) > time.time():
        pass
    else:
        forecast = getForecast( [api key] ,38.6270,-90.1994)
        data = prepData(forecast)
        cur_time = time.time()

    showCurrent(data['current'])
    time.sleep(delay)
    showSevenDayTemps(data['lows'], 'low')
    time.sleep(delay)
    showSevenDayTemps(data['highs'], 'high')
    time.sleep(delay)
    showSevenDayPrecip(data['precip'], 'precip')
    time.sleep(delay)