home/portalmonitor.py

   1 #!/usr/bin/env python3
   2
   3 import argparse
   4 import requests
   5 import time
   6 import sys
   7 import configparser
   8 from suntime import Sun
   9
  10 parser = argparse.ArgumentParser()
  11 parser.add_argument("-s",
  12                   "--status",
  13                   action="store_true",
  14                   dest="printStatus",
  15                   help="Print Status Information",
  16                   default=False)
  17 parser.add_argument("-f",
  18                   "--force",
  19                   action="store_true",
  20                   dest="force",
  21                   help="Force retrieval of Power value",
  22                   default=False)
  23 args = parser.parse_args()
  24
  25
  26 def isDaylight(lat, lon, toleranceSeconds):
  27     daylight = False
  28     sun = Sun(lat, lon)
  29     sunriseTimestamp = int(sun.get_local_sunrise_time().timestamp())
  30     sunsetTimestamp = int(sun.get_local_sunset_time().timestamp())
  31     nowTimestamp = int(time.time())
  32
  33     if ((sunriseTimestamp + toleranceSeconds) < nowTimestamp) and (
  34         (sunsetTimestamp - toleranceSeconds) > nowTimestamp):
  35         daylight = True
  36
  37     return daylight
  38
  39
  40 def getCurrentPower(userName, password, stationId):
  41     with requests.Session() as s:
  42         try:
  43             r = s.post('https://www.envertecportal.com/apiaccount/login',
  44                        data={
  45                            'userName': userName,
  46                            'pwd': password
  47                        },
  48                        timeout=(10, 30))
  49
  50             r = s.post(
  51                 'https://www.envertecportal.com/ApiStations/getStationInfo',
  52                 data={
  53                     'stationId': stationId
  54                 },
  55                 timeout=(10, 60)).json()
  56             power = r['Data']['Power']
  57
  58             r = s.post('https://www.envertecportal.com/apiAccount/Logout',
  59                        timeout=(10, 30))
  60         except requests.exceptions.RequestException as e:
  61             raise SystemExit(e)
  62
  63     return float(power)
  64
  65
  66 # use our stateFile to determine if we have a state change
  67 # used to decide if we print something - thus generate a mail - later on
  68 def stateCheck(newState, stateFile):
  69     try:
  70         with open(stateFile, "r") as f:
  71             oldState = f.read()
  72     except FileNotFoundError:
  73         oldState = "NULL"
  74
  75     if newState == oldState:
  76         change = False
  77     else:
  78         change = True
  79         with open(stateFile, "w") as f:
  80             f.write(newState)
  81
  82     return change
  83
  84
  85 # read configuration file
  86 conf = configparser.ConfigParser()
  87 conf.read('portalmonitor.ini')
  88
  89 # retrieve current power value as reported by envertecportal
  90 if isDaylight(conf['config'].getfloat('lat'), conf['config'].getfloat('lon'),
  91               conf['config'].getint('toleranceSeconds')) or args.force:
  92     currentPower = getCurrentPower(conf['config']['userName'],
  93                                    conf['config']['password'],
  94                                    conf['config']['stationId'])
  95
  96     if args.printStatus:
  97         print(f"Current Power: {currentPower}")
  98
  99     if currentPower == 0:
 100         if stateCheck('FAILED', conf['config']['stateFile']):
 101             print('Error: Power dropped to 0 but we should have daylight!')
 102         sys.exit(1)
 103     else:
 104         if stateCheck('OK', conf['config']['stateFile']):
 105             print(f"Resolved: Inverter reports {currentPower}W")