【ツクレル勉強会】ラズパイでスマート温湿度計を作ろう - サンプルコード

demo.py

import time

from sense_hat import SenseHat


sense = SenseHat()


def main():
    sense.clear(128, 128, 128)

    while True:
        temp = sense.get_temperature()
        hum = sense.get_humidity()
        pres = sense.get_pressure()
        print(f'====={time.ctime()}=====')
        print(f'Temperature: {temp}')
        print(f'Humidity: {hum}')
        print(f'Pressure: {pres}')

        events = []
        for event in sense.stick.get_events():
            events.append([event.action, event.direction])
        print(f'Events: {events}')

        time.sleep(2)


if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        sense.clear()

flu.py

def get_vh(temp, hum):
    return 217*(6.1078*10**(7.5*temp/(temp+237.3)))/(temp+273.15)*hum/100


def get_flu_level(vh):
    if vh > 17:
        return 1, "非常に安全"
    if vh > 11:
        return 2, "安全"
    if vh > 7:
        return 3, "要注意"

    return 4, "警戒"


if __name__ == '__main__':
    from sense_hat import SenseHat
    #from sense_emu import SenseHat

    TEMP_DELTA = 0

    sense = SenseHat()

    temp = sense.get_temperature() - TEMP_DELTA
    hum = sense.get_humidity()

    vh = get_vh(temp, hum)
    level, msg = get_flu_level(vh)

    print(f'Temperature: {temp}, Humidity: {hum}')
    print(f'Volumetric humidity: {vh}')
    print(f'Level: {level}, Message: {msg}')

ifttt.py

import requests


class Webhook:
    def __init__(self, event_name, ifttt_key):
        self.event_name = event_name
        self.ifttt_key = ifttt_key
        self.update_url()

    def update_url(self, event=None):
        if event:
            self.event_name = event
        self.url = "https://maker.ifttt.com/trigger/" + \
            self.event_name + "/with/key/" + self.ifttt_key

    def post(self, *, event=None, payload={}):
        if event:
            self.update_url(event)
        response = requests.post(self.url, data=payload)
        return response

main-alert.py

from sense_hat import SenseHat
#from sense_emu import SenseHat
from ifttt import Webhook
from flu import *

import time


IFTTT_KEY = ''
TEMP_DELTA = 0
CHECK_SPAN = 60 * 10

sense = SenseHat()
# イベント名は後で変更するので最初は何でも良い
webhook = Webhook('demo', IFTTT_KEY)


def alert(message):
    payload = {
        "value1": message
    }
    res = webhook.post(event='send_message', payload=payload)
    if not res.ok:
        print('Request failed with status code', res.status_code)


def main():
    vh_level = 0
    while True:
        temp = sense.get_temperature() - TEMP_DELTA
        hum = sense.get_humidity()

        '''
        インフルエンザ警戒度が3以上に変化したらアラートを出す
        '''
        vh = get_vh(temp, hum)
        level, msg = get_flu_level(vh)
        if (vh_level < 3 and level >= 3) or (vh_level < 4 and level >= 4):
            alert(f'【{msg}】インフルエンザにご注意ください。現在の絶対湿度は{round(vh)}g/m3です。加湿しましょう。')
        vh_level = level

        time.sleep(CHECK_SPAN)


if __name__ == '__main__':
    main()