#!/usr/bin/python
# -*- coding: utf-8 -*-

# USB device
usbdevice = "/dev/ttyUSB0"

# MQTT configuration
mqtt_username = "USERNAME"
mqtt_password = "PASSWORD"
mqtt_server = "HOSTNAME|IP-ADDRESS"
mqtt_server_port = "1883"


import os
import time
import serial
import sys
import json
from threading import Timer
import paho.mqtt.client as mqtt

client = mqtt.Client(client_id="SML-python", clean_session=False)
client.username_pw_set(username=mqtt_username, password=mqtt_password)
client.connect(mqtt_server, port=mqtt_server_port)
client.loop_start()
time.sleep(4)

mystring = ""
crc16_x25_table = [
	0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD,	0x6536, 0x74BF,
	0x8C48, 0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7,
	0x1081, 0x0108,	0x3393, 0x221A, 0x56A5, 0x472C, 0x75B7, 0x643E,
	0x9CC9, 0x8D40, 0xBFDB, 0xAE52, 0xDAED, 0xCB64,	0xF9FF, 0xE876,
	0x2102, 0x308B, 0x0210, 0x1399,	0x6726, 0x76AF, 0x4434, 0x55BD,
	0xAD4A, 0xBCC3,	0x8E58, 0x9FD1, 0xEB6E, 0xFAE7, 0xC87C, 0xD9F5,
	0x3183, 0x200A, 0x1291, 0x0318, 0x77A7, 0x662E,	0x54B5, 0x453C,
	0xBDCB, 0xAC42, 0x9ED9, 0x8F50,	0xFBEF, 0xEA66, 0xD8FD, 0xC974,
	0x4204, 0x538D,	0x6116, 0x709F, 0x0420, 0x15A9, 0x2732, 0x36BB,
	0xCE4C, 0xDFC5, 0xED5E, 0xFCD7, 0x8868, 0x99E1,	0xAB7A, 0xBAF3,
	0x5285, 0x430C, 0x7197, 0x601E,	0x14A1, 0x0528, 0x37B3, 0x263A,
	0xDECD, 0xCF44,	0xFDDF, 0xEC56, 0x98E9, 0x8960, 0xBBFB, 0xAA72,
	0x6306, 0x728F, 0x4014, 0x519D, 0x2522, 0x34AB,	0x0630, 0x17B9,
	0xEF4E, 0xFEC7, 0xCC5C, 0xDDD5,	0xA96A, 0xB8E3, 0x8A78, 0x9BF1,
	0x7387, 0x620E,	0x5095, 0x411C, 0x35A3, 0x242A, 0x16B1, 0x0738,
	0xFFCF, 0xEE46, 0xDCDD, 0xCD54, 0xB9EB, 0xA862,	0x9AF9, 0x8B70,
	0x8408, 0x9581, 0xA71A, 0xB693,	0xC22C, 0xD3A5, 0xE13E, 0xF0B7,
	0x0840, 0x19C9,	0x2B52, 0x3ADB, 0x4E64, 0x5FED, 0x6D76, 0x7CFF,
	0x9489, 0x8500, 0xB79B, 0xA612, 0xD2AD, 0xC324,	0xF1BF, 0xE036,
	0x18C1, 0x0948, 0x3BD3, 0x2A5A,	0x5EE5, 0x4F6C, 0x7DF7, 0x6C7E,
	0xA50A, 0xB483,	0x8618, 0x9791, 0xE32E, 0xF2A7, 0xC03C, 0xD1B5,
	0x2942, 0x38CB, 0x0A50, 0x1BD9, 0x6F66, 0x7EEF,	0x4C74, 0x5DFD,
	0xB58B, 0xA402, 0x9699, 0x8710,	0xF3AF, 0xE226, 0xD0BD, 0xC134,
	0x39C3, 0x284A,	0x1AD1, 0x0B58, 0x7FE7, 0x6E6E, 0x5CF5, 0x4D7C,
	0xC60C, 0xD785, 0xE51E, 0xF497, 0x8028, 0x91A1,	0xA33A, 0xB2B3,
	0x4A44, 0x5BCD, 0x6956, 0x78DF,	0x0C60, 0x1DE9, 0x2F72, 0x3EFB,
	0xD68D, 0xC704,	0xF59F, 0xE416, 0x90A9, 0x8120, 0xB3BB, 0xA232,
	0x5AC5, 0x4B4C, 0x79D7, 0x685E, 0x1CE1, 0x0D68,	0x3FF3, 0x2E7A,
	0xE70E, 0xF687, 0xC41C, 0xD595,	0xA12A, 0xB0A3, 0x8238, 0x93B1,
	0x6B46, 0x7ACF,	0x4854, 0x59DD, 0x2D62, 0x3CEB, 0x0E70, 0x1FF9,
	0xF78F, 0xE606, 0xD49D, 0xC514, 0xB1AB, 0xA022,	0x92B9, 0x8330,
	0x7BC7, 0x6A4E, 0x58D5, 0x495C,	0x3DE3, 0x2C6A, 0x1EF1, 0x0F78]

class Watchdog_timer:
	def __init__(self, timeout, userHandler=None):
		self.timeout = timeout
		self.handler = userHandler if userHandler is not None else self.defaultHandler
		self.timer = Timer(self.timeout, self.handler)
		self.timer.start()

	def reset(self):
		self.timer.cancel()
		self.timer = Timer(self.timeout, self.handler)
		self.timer.start()

	def stop(self):
		self.timer.cancel()

	def defaultHandler(self):
		raise self


def crc16_x25(Buffer):
	crcsum = 0xffff
	global crc16_x25_table
	for byte in Buffer:
		crcsum = crc16_x25_table[(ord(byte) ^ crcsum) & 0xff] ^ (crcsum >> 8 & 0xff)
	crcsum ^= 0xffff
	return crcsum

def watchdogtimer_ovf():
	global mystring
	message = mystring[0:-2]
	crc_rx = int((mystring[-1] + mystring[-2]).encode('hex'), 16)
	crc_calc = crc16_x25(message)
	if crc_rx == crc_calc:
		if message[0:8] == '\x1b\x1b\x1b\x1b\x01\x01\x01\x01':
			watchdog.stop()
			Wirkenergie_Summe_T1_T2_Wh = round((int(message[150:158].encode('hex'),16)*0.1),4)
			Wirkenergie_Verbrauch_Hochtarif_T1_Wh = round((int(message[174:182].encode('hex'),16)*0.1),4)
			Wirkenergie_Verbrauch_Niedertarif_T2_Wh = round((int(message[198:206].encode('hex'),16)*0.1),4)
			Momentane_Leistung_Summe_W = (int(message[222:226].encode('hex'),16))
			Momentane_Leistung_Phase_L1_W = (int(message[242:246].encode('hex'),16))
			Momentane_Leistung_Phase_L2_W = (int(message[262:266].encode('hex'),16))
			Momentane_Leistung_Phase_L3_W = (int(message[282:286].encode('hex'),16))
			mystring=""
			client.publish("sml/ISKRA_MT681/Wirkenergie_Summe_T1_T2_Wh",str(Wirkenergie_Summe_T1_T2_Wh))
			client.publish("sml/ISKRA_MT681/Wirkenergie_Verbrauch_Hochtarif_T1_Wh",str(Wirkenergie_Verbrauch_Hochtarif_T1_Wh))
			client.publish("sml/ISKRA_MT681/Wirkenergie_Verbrauch_Niedertarif_T2_Wh",str(Wirkenergie_Verbrauch_Niedertarif_T2_Wh))
			client.publish("sml/ISKRA_MT681/Momentane_Leistung_Summe_W",str(Momentane_Leistung_Summe_W))
			client.publish("sml/ISKRA_MT681/Momentane_Leistung_Phase_L1_W",str(Momentane_Leistung_Phase_L1_W))
			client.publish("sml/ISKRA_MT681/Momentane_Leistung_Phase_L2_W",str(Momentane_Leistung_Phase_L2_W))
			client.publish("sml/ISKRA_MT681/Momentane_Leistung_Phase_L3_W",str(Momentane_Leistung_Phase_L3_W))
			mystring=""

		else:
			mystring=""
			watchdog.stop()

	else:
		mystring=""
		watchdog.stop()

time.sleep(10)

try:
	my_tty = serial.Serial(port=usbdevice, baudrate = 9600, parity =serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS, timeout=0)
	my_tty.close()
	my_tty.open()

except Exception, e:
	exit()

try:
	my_tty.reset_input_buffer()
	my_tty.reset_output_buffer()
	watchdog = Watchdog_timer(0.1, watchdogtimer_ovf)
	watchdog.stop()
	while True:
		while my_tty.in_waiting > 0:
			mystring += my_tty.read()
			watchdog.reset()

except KeyboardInterrupt:
	my_tty.close()
	client.loop_stop()

#!/usr/bin/python
# -*- coding: utf-8 -*-

# USB device
usbdevice = "/dev/ttyUSB0"

# MQTT configuration
mqtt_username = "USERNAME"
mqtt_password = "PASSWORD"
mqtt_server = "HOSTNAME|IP-ADDRESS"
mqtt_server_port = "1883"


import os
import time
import serial
import sys
import json
from threading import Timer
import paho.mqtt.client as mqtt

client = mqtt.Client(client_id="SML-python", clean_session=False)
client.username_pw_set(username=mqtt_username, password=mqtt_password)
client.connect(mqtt_server, port=mqtt_server_port)
client.loop_start()
time.sleep(4)

mystring = ""
crc16_x25_table = [
	0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD,	0x6536, 0x74BF,
	0x8C48, 0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7,
	0x1081, 0x0108,	0x3393, 0x221A, 0x56A5, 0x472C, 0x75B7, 0x643E,
	0x9CC9, 0x8D40, 0xBFDB, 0xAE52, 0xDAED, 0xCB64,	0xF9FF, 0xE876,
	0x2102, 0x308B, 0x0210, 0x1399,	0x6726, 0x76AF, 0x4434, 0x55BD,
	0xAD4A, 0xBCC3,	0x8E58, 0x9FD1, 0xEB6E, 0xFAE7, 0xC87C, 0xD9F5,
	0x3183, 0x200A, 0x1291, 0x0318, 0x77A7, 0x662E,	0x54B5, 0x453C,
	0xBDCB, 0xAC42, 0x9ED9, 0x8F50,	0xFBEF, 0xEA66, 0xD8FD, 0xC974,
	0x4204, 0x538D,	0x6116, 0x709F, 0x0420, 0x15A9, 0x2732, 0x36BB,
	0xCE4C, 0xDFC5, 0xED5E, 0xFCD7, 0x8868, 0x99E1,	0xAB7A, 0xBAF3,
	0x5285, 0x430C, 0x7197, 0x601E,	0x14A1, 0x0528, 0x37B3, 0x263A,
	0xDECD, 0xCF44,	0xFDDF, 0xEC56, 0x98E9, 0x8960, 0xBBFB, 0xAA72,
	0x6306, 0x728F, 0x4014, 0x519D, 0x2522, 0x34AB,	0x0630, 0x17B9,
	0xEF4E, 0xFEC7, 0xCC5C, 0xDDD5,	0xA96A, 0xB8E3, 0x8A78, 0x9BF1,
	0x7387, 0x620E,	0x5095, 0x411C, 0x35A3, 0x242A, 0x16B1, 0x0738,
	0xFFCF, 0xEE46, 0xDCDD, 0xCD54, 0xB9EB, 0xA862,	0x9AF9, 0x8B70,
	0x8408, 0x9581, 0xA71A, 0xB693,	0xC22C, 0xD3A5, 0xE13E, 0xF0B7,
	0x0840, 0x19C9,	0x2B52, 0x3ADB, 0x4E64, 0x5FED, 0x6D76, 0x7CFF,
	0x9489, 0x8500, 0xB79B, 0xA612, 0xD2AD, 0xC324,	0xF1BF, 0xE036,
	0x18C1, 0x0948, 0x3BD3, 0x2A5A,	0x5EE5, 0x4F6C, 0x7DF7, 0x6C7E,
	0xA50A, 0xB483,	0x8618, 0x9791, 0xE32E, 0xF2A7, 0xC03C, 0xD1B5,
	0x2942, 0x38CB, 0x0A50, 0x1BD9, 0x6F66, 0x7EEF,	0x4C74, 0x5DFD,
	0xB58B, 0xA402, 0x9699, 0x8710,	0xF3AF, 0xE226, 0xD0BD, 0xC134,
	0x39C3, 0x284A,	0x1AD1, 0x0B58, 0x7FE7, 0x6E6E, 0x5CF5, 0x4D7C,
	0xC60C, 0xD785, 0xE51E, 0xF497, 0x8028, 0x91A1,	0xA33A, 0xB2B3,
	0x4A44, 0x5BCD, 0x6956, 0x78DF,	0x0C60, 0x1DE9, 0x2F72, 0x3EFB,
	0xD68D, 0xC704,	0xF59F, 0xE416, 0x90A9, 0x8120, 0xB3BB, 0xA232,
	0x5AC5, 0x4B4C, 0x79D7, 0x685E, 0x1CE1, 0x0D68,	0x3FF3, 0x2E7A,
	0xE70E, 0xF687, 0xC41C, 0xD595,	0xA12A, 0xB0A3, 0x8238, 0x93B1,
	0x6B46, 0x7ACF,	0x4854, 0x59DD, 0x2D62, 0x3CEB, 0x0E70, 0x1FF9,
	0xF78F, 0xE606, 0xD49D, 0xC514, 0xB1AB, 0xA022,	0x92B9, 0x8330,
	0x7BC7, 0x6A4E, 0x58D5, 0x495C,	0x3DE3, 0x2C6A, 0x1EF1, 0x0F78]

class Watchdog_timer:
	def __init__(self, timeout, userHandler=None):
		self.timeout = timeout
		self.handler = userHandler if userHandler is not None else self.defaultHandler
		self.timer = Timer(self.timeout, self.handler)
		self.timer.start()

	def reset(self):
		self.timer.cancel()
		self.timer = Timer(self.timeout, self.handler)
		self.timer.start()

	def stop(self):
		self.timer.cancel()

	def defaultHandler(self):
		raise self


def crc16_x25(Buffer):
	crcsum = 0xffff
	global crc16_x25_table
	for byte in Buffer:
		crcsum = crc16_x25_table[(ord(byte) ^ crcsum) & 0xff] ^ (crcsum >> 8 & 0xff)
	crcsum ^= 0xffff
	return crcsum

def watchdogtimer_ovf():
	global mystring
	message = mystring[0:-2]
	crc_rx = int((mystring[-1] + mystring[-2]).encode('hex'), 16)
	crc_calc = crc16_x25(message)
	if crc_rx == crc_calc:
		if message[0:8] == '\x1b\x1b\x1b\x1b\x01\x01\x01\x01':
			watchdog.stop()
			Wirkenergie_Summe_T1_T2_Wh = round((int(message[150:158].encode('hex'),16)*0.1),4)
			Wirkenergie_Verbrauch_Hochtarif_T1_Wh = round((int(message[174:182].encode('hex'),16)*0.1),4)
			Wirkenergie_Verbrauch_Niedertarif_T2_Wh = round((int(message[198:206].encode('hex'),16)*0.1),4)
			Momentane_Leistung_Summe_W = (int(message[222:226].encode('hex'),16))
			Momentane_Leistung_Phase_L1_W = (int(message[242:246].encode('hex'),16))
			Momentane_Leistung_Phase_L2_W = (int(message[262:266].encode('hex'),16))
			Momentane_Leistung_Phase_L3_W = (int(message[282:286].encode('hex'),16))
			mystring=""
			client.publish("sml/ISKRA_MT681/Wirkenergie_Summe_T1_T2_Wh",str(Wirkenergie_Summe_T1_T2_Wh))
			client.publish("sml/ISKRA_MT681/Wirkenergie_Verbrauch_Hochtarif_T1_Wh",str(Wirkenergie_Verbrauch_Hochtarif_T1_Wh))
			client.publish("sml/ISKRA_MT681/Wirkenergie_Verbrauch_Niedertarif_T2_Wh",str(Wirkenergie_Verbrauch_Niedertarif_T2_Wh))
			client.publish("sml/ISKRA_MT681/Momentane_Leistung_Summe_W",str(Momentane_Leistung_Summe_W))
			client.publish("sml/ISKRA_MT681/Momentane_Leistung_Phase_L1_W",str(Momentane_Leistung_Phase_L1_W))
			client.publish("sml/ISKRA_MT681/Momentane_Leistung_Phase_L2_W",str(Momentane_Leistung_Phase_L2_W))
			client.publish("sml/ISKRA_MT681/Momentane_Leistung_Phase_L3_W",str(Momentane_Leistung_Phase_L3_W))
			mystring=""

		else:
			mystring=""
			watchdog.stop()

	else:
		mystring=""
		watchdog.stop()

time.sleep(10)

try:
	my_tty = serial.Serial(port=usbdevice, baudrate = 9600, parity =serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS, timeout=0)
	my_tty.close()
	my_tty.open()

except Exception, e:
	exit()

try:
	my_tty.reset_input_buffer()
	my_tty.reset_output_buffer()
	watchdog = Watchdog_timer(0.1, watchdogtimer_ovf)
	watchdog.stop()
	while True:
		while my_tty.in_waiting > 0:
			mystring += my_tty.read()
			watchdog.reset()

except KeyboardInterrupt:
	my_tty.close()
	client.loop_stop()

#!/usr/bin/python # -*- coding: utf-8 -*- # USB device # MQTT configuration