Lab7 MS

import RPi.GPIO as GPIO
import random
import temperature #temperature stub
import plotly.plotly as plot #plotly API
import json #extract credentials
import time #delay
import datetime #temp-time chart association

with open('./credentials.json') as credentials_file:
        plotly_user_config = json.load(credentials_file)

plot.sign_in(plotly_user_config["plotly_username"],
        plotly_user_config["plotly_api_key"])

START   = -5;
STOP    = 30;

GPIO.setmode(GPIO.BOARD)
GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_UP)

# stub for temperature sensor
def read_temp():
    temp = random.randrange(START, STOP)
    return temp

url = plot.plot([
        {
                'x': [],
                'y': [],
                'type': 'scatter',
                'mode':'lines+markers',
                'stream': {
                'token': plotly_user_config['plotly_streaming_tokens'][0],
                'maxpoints': 200
                }
        }], filename='MS-IOT 2016')

print "View your streaming graph here: ", url

stream = plot.Stream(plotly_user_config['plotly_streaming_tokens'][0])
stream.open()

while True:
        state = GPIO.input(18)
        print(state)
        # read temperature from our stub module
        temp = temperature.read_temp()
        if state == False:
                # post data to plotly
                stream.write({'x': datetime.datetime.now(), 'y': temp})
        time.sleep(2)

GPIO.cleanup()