Switch King - Forum

Code: Select all

#This script is used to calculate average kWh usage last 0.5,1,5,10,15,30,45 or 60 minutes. It is based on that one counter from the RFXMeter equals 1 watt.

import time

eg.event.payload_copy = eg.event.payload

#rfxmeterinterval refers to the report interval of the RFXMeter
#Values can be 30 seconds, minute, 5 minutes, 10 minutes, 15 minutes, 30 minutes, 45 minutes or 60 minutes
rfxmeterinterval = 'minute'

#Path to store temporary counters and time.
datafile = "c:/sensors/now.txt"

#Devicename = same as datasource in Switch King. Remove this if you don't use Switch King.
devicename = 'Power usage now'

now = time.time()
counter = int(eg.event.payload_copy.split(' ')[2])

def getLastValue():
    try:
        f = open(datafile)
        last, then = f.read().split()
        f.close()
        return int(last), float(then)
    except:
        return -1, -1

def saveLastValue(value):
    f = open(datafile, "w")
    f.write("%d %f" % (value, now))
    f.close()

last, then = getLastValue()

saveLastValue(counter)

if last != -1:
    kWh = ((counter - last) / float(now - then)) * 3600.0 / 1000.0
else:
    print "Could not fetch last data"
    kwh = 0

print "Counter: %d" % counter
print "Average power usage last",rfxmeterinterval,": %.3f kWh" % kWh

#Used to transfer data to Switch King. Remove if you don't use Switch King.
eg.plugins.SwitchkingTellStick.DSSet('', devicename, str(kWh), 0)