Python script to authenticate and pull data from ovo energy to track smart meter usage. Uses ovo's RESTful API interface. At present, the script will error on the initial authentication if no valid token already exists, as takes a short while for ovo to catch up it seems, so I need to add in a catch for this.

ovoapi.py

#!/usr/bin/env python

# This requires Python 2.7.  This will not work with Python 3

USERNAME = 'Your@email.address'
PASSWORD = 'Your ovo Password'

from requests import Request, Session
import json
import time
from time import gmtime, strftime

epoch_time = int(time.time()//60 * 60)

def main():
  url = 'https://my.ovoenergy.com/api/auth/login'
  postdata = {'username':USERNAME,'password':PASSWORD,'rememberMe':'true'}
  headers = {
    'content-type':'application/json;charset=UTF-8',
    'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36'
  }
  s = Session()
  response = s.post(url,data=json.dumps(postdata),headers=headers)
  url = 'https://paym.ovoenergy.com/api/paym/accounts'
  response = s.get(url,headers=headers)
  fullData = json.loads(response.content)[0]

  for device in fullData['consumers']:
    print "Getting readings for %s meter with mpan %s:" % (device['utilityType'], device['mpan'])
    print "  Estimated Annual Usage is %s %s" % (device['meters'][0]['estimatedAnnualConsumption'], device['meters'][0]['unitOfMeasure'])
    url = 'https://live.ovoenergy.com/api/live/meters/%s/consumptions/instant' % device['mpan']
    response = s.get(url,headers=headers)
    realtimeData = json.loads(response.content)
    print "  Current Demand    : %s %s" % (realtimeData['consumption']['demand'], realtimeData['measurementUnit'])
    print "  Current Cost/Hour : %s" % realtimeData['consumption']['consumptionPrice']['amount']
    print "  Past 10 Minutes of Data:"

    url = 'https://live.ovoenergy.com/api/live/meters/%s/instant-power?from=%s&to=%s' % (device['mpan'], time.strftime('%Y-%m-%dT%H:%M:%SZ', time.localtime(int(epoch_time - 600))), time.strftime('%Y-%m-%dT%H:%M:%SZ', time.localtime(epoch_time)))
    response = s.get(url,headers=headers)
    historyData = json.loads(response.content)
    for historyItem in historyData['power']:
      tdepoch = int(historyItem['startTime']) / 1000.0
      if 'dataError' not in historyItem:
        print "    [%s] Demand %s %s\t(Cost/Hour %s)" % (time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(tdepoch)), historyItem['instantPower'], realtimeData['measurementUnit'], historyItem['price'])
      else:
        print "    [%s] No Data Available" % time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(tdepoch))

if __name__ == '__main__':
  main()