RainEagle/bin/meter_status.py

#!/usr/local/bin/python2.7
"""
    A simple script get current meter values
"""
	 
__author__ = "Peter Shipley"

import sys
sys.path.append('/usr/home/shipley/Projects/Eagle') # temp


# import RainEagle
from RainEagle import Eagle, to_epoch_1970
import time
from pprint import pprint

debug = 0

def main() :
    eg = Eagle( debug=debug , addr="10.1.1.39")
    # timeout=45,

    r = eg.get_device_data()

    print_instantdemand( r['InstantaneousDemand'])
    print

    print_currentsummation(r['CurrentSummation'])
    print

    exit(0)

def twos_comp(val, bits=32):
    """compute the 2's compliment of int value val"""
    if( (val&(1<<(bits-1))) != 0 ):
	val = val - (1<<bits)
    return val

def print_currentsummation(cs) :

    multiplier = int(cs['Multiplier'], 16)
    divisor = int(cs['Divisor'], 16)
    delivered = int(cs['SummationDelivered'], 16)
    received = int(cs['SummationReceived'], 16)

    if multiplier == 0 :
	multiplier = 1

    if divisor == 0 :
	divisor = 1

    reading_received = received * multiplier / float (divisor)
    reading_delivered = delivered * multiplier / float (divisor)

    time_stamp = to_epoch_1970(cs['TimeStamp'])

    print "{0:s} : ".format(time.asctime(time.localtime(time_stamp)))
    print "\tReceived  = {0:{width}.3f} Kw".format(reading_received, width=10)
    print "\tDelivered = {0:{width}.3f} Kw".format(reading_delivered, width=10)
    print "\t\t{0:{width}.3f} Kw".format( (reading_delivered - reading_received), width=14)


#    print "{0}\t{1:.4f}\t{2:0.4f}\t{3:.4f}".format(
#	time.strftime("%Y-%m-%d %H:%M:%S", time_struct), 
#	reading_received, 
#	reading_delivered, 
#	(reading_delivered - reading_received) )


def print_instantdemand(idemand) :

    time_stamp = to_epoch_1970(idemand['TimeStamp'])

    multiplier = int(idemand['Multiplier'], 16)
    divisor = int(idemand['Divisor'], 16)

#    demand = twos_comp(int(idemand['Demand'], 16))

    demand = int(idemand['Demand'], 16)

    if demand > 0x7FFFFFFF:
	demand -= 0x100000000

    if multiplier == 0 :
	multiplier = 1

    if divisor == 0 :
	divisor = 1

    reading = (demand * multiplier) /  float (divisor )

    print "{0:s} : ".format(time.asctime(time.localtime(time_stamp)))
    print "\tDemand    = {0:{width}.3f} Kw".format(reading, width=10)
    print "\tAmps      = {0:{width}.3f}".format( ((reading * 1000) / 240), width=10 )


# 
if __name__ == "__main__":
    # import __main__
    # print(__main__.__file__) 
    # print("syntax ok") 
    main()
    exit(0)