Home Automation Domotica Forum Europe, Bwired Forum

Code: Select all

import RPi.GPIO as GPIO
import requests
import time
import urllib


GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.OUT)

# how long is a pulse, this is ok for toon meteradapter
ledPulseWidth = 0.01
# how often per seconds do we get new Watts - faster is better resolution on the Toon compared to the P1 output from the slimme meter
collectWattsInterval = 5
# initial watts (can not be 0)
watts = 0.01
#how many pulses per watthour (2 = 2000 imp/kwh)
pwh = 2
#initiate the timer
last = time.time()

def getWatts():
        value = requests.get('some url which provides the current Watt produces by your inverter')
        try:
                newwatts = float(value)
        except ValueError:
                newwatts = watts
        print "New watts: ",newwatts
        return newwatts

watts = getWatts()
lastWattsPull=time.time()
nextPulseTime = 3600/watts/pwh

while True:
        if (time.time() > (last+nextPulseTime)):
                last = time.time()
                nextPulseTime = float(3600/watts/pwh)
                print "Calculated next pulse after (seconds): ",nextPulseTime
                if (watts > 10):
                        GPIO.output(18,GPIO.HIGH)
                        print "Giving pulse"
                        time.sleep(ledPulseWidth)
                        GPIO.output(18,GPIO.LOW)
        if (time.time() > (lastWattsPull+collectWattsInterval)):
                watts = getWatts()
                lastWattsPull=time.time()
        # need to sleep a short amount of time  before looping back or else the cpu on the Pi will not go idle
        time.sleep(0.01)

GPIO.cleanup()