read_website_speed.py

import json
import requests
from datetime import datetime, timedelta
import serial
from time import sleep

DEVICE_PATH = "/dev/YOUR_DEVICE"

token = "YOUR TOKEN"
subject_id = "SERVICE ID FROM Server Density"

# get start and end date via datetime
start = datetime.now() - timedelta(seconds=600)
end = datetime.now()

# build a filter
filter = {
    'time':"all"
}

ser = serial.Serial(DEVICE_PATH, 9600, timeout=1)
sleep(5)
ser.write('california\n')
sleep(1)
ser.write('uk\n')
sleep(1)
ser.write('moscow\n')
sleep(1)
ser.write('sydney\n')
sleep(1)


while (True):
    api_response = requests.get(
        'https://api.serverdensity.io/metrics/graphs/{0}'.format(subject_id),
        params={
            'token': token,
            'start' : start.isoformat(),
            'end': end.isoformat(),
            'filter': json.dumps(filter)
        }
    )


    for stat in api_response.json()[0]['tree']:
        name = stat['name']
        timing = stat['data'][0]['y']

        if timing > 0.4:
            print "Slow!"
            if name == "USA: North California":
                ser.write('california\n')
                sleep(1)
            if name == "UK: London (Vultr)":
                ser.write('uk\n')
                sleep(1)
            if name == "Russia: Moscow":
                ser.write('moscow\n')
                sleep(1)
            if name == "Australia: Sydney (Vultr)":
                ser.write('sydney\n')
                sleep(1)
        print "{0} -> {1}".format(name, timing)

    sleep(600)