sprinkler.py

#!/usr/bin/env python

from Koyo import Koyo
import urllib2
import json
import time

from et import Et

plc = Koyo('192.168.0.200')

f = urllib2.urlopen('http://api.wunderground.com/api/{apiKey}/geolookup/conditions/q/OR/Hillsboro.json')
json_string = f.read()
f.close()
parsed_json = json.loads(json_string)
location = parsed_json['location']['city']
temp_f = parsed_json['current_observation']['temp_f']

precip = parsed_json['current_observation']['precip_today_metric']

lawn = Et('fogo').get()["LAWN"]

with open('/home/root/config.json') as config_file:
        sprinklerSystem = json.load(config_file)

zones = sprinklerSystem['zones']

precip = float(precip)

print ("daily precipitation", precip, " forcasted et ", lawn.forcast)


if precip < lawn.forcast:
        stillNeed = lawn.forcast - precip

        for zone in zones:
                waterTime = stillNeed / zone['rate']
                print ("starting zone {0} for {1} mins".format(zone['id'], waterTime))
                plc.WriteOutput(zone['id'], True)

                time.sleep(waterTime * 60)
                plc.WriteOutput(zone['id'], False)