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@Tafkas Tafkas/pysml.py
Last active Aug 29, 2015

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Script to read SML data packages from a residential meter
#!/usr/bin/env python
# encoding: utf-8
"""
pysml.py
Created by Christian Stade-Schuldt on 2014-10-25.
"""
import sys
import os
import datetime
import serial
import time
import re
# SML regexes
complete_message_regex = '1b1b1b1b01010101.*1b1b1b1b.{8}'
meter_108_regex = '070100010800.{24}(.{8})0177'
meter_208_regex = '070100020800.{24}(.{8})0177'
meter_167_regex = '070100100700.{16}(.{8})0177'
def main():
ser = serial.Serial('/dev/ttyUSB0', baudrate=9600, bytesize=8, parity='N', stopbits=1, timeout=0 )
tty_error = 0
t = 10
if tty_error == 0:
while t > 0:
t -=1
data = ser.read(2048)
data = data.encode('hex')
if re.match(complete_message_regex, data):
m108 = re.search(meter_108_regex, data)
m208 = re.search(meter_208_regex, data)
m167 = re.search(meter_167_regex, data)
if m108 and m208 and m167:
m167 = int(m167.group(1),16)
# check if value is negative
if m167 > 0x7FFFFFFF:
m167 -= 0x100000000
print int(m108.group(1),16)/10000.0
print int(m208.group(1),16)/10000.0
print m167/10.0
t = 0
time.sleep(1)
if __name__ == '__main__':
main()
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