Polling script for displaying AWS IoT thing temperature

telemetry.py

# -*- coding: utf-8 -*-

import json
import time
import os

from boto3.session import Session

session = Session(aws_access_key_id='<access key>',
                  aws_secret_access_key='<secret key>',
                  region_name='<region>')

iot = session.client('iot-data')

def get_temperature():
    response = iot.get_thing_shadow(thingName='myThing')

    json_string = b''

    for chunk in iter(lambda: response['payload'].read(8192), b''):
        json_string += chunk

    data = json.loads(json_string.decode('utf-8'))
    return float(data['state']['reported']['temperature'])

while True:
    print "Updating..."
    temp = get_temperature()

    os.system('clear')
    
    print "My Thing Temperature"
    print "----------------------"
    
    print u"{:.2f} °C".format(temp)

    time.sleep(10)