annotate iec1107.py @ 6:e9efe3ddc9a7

Add TinyCAD schematic and VeeCAD layout.
author Daniel O'Connor <darius@dons.net.au>
date Wed, 20 Nov 2013 23:05:22 +1030
parents b686ad203c1e
children 08b192a6e189
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1 #!/usr/bin/env python
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2 #
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3 # Copyright (c) 2013
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4 # Daniel O'Connor <darius@dons.net.au>. All rights reserved.
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5 #
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6 # Redistribution and use in source and binary forms, with or without
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7 # modification, are permitted provided that the following conditions
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8 # are met:
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9 # 1. Redistributions of source code must retain the above copyright
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10 # notice, this list of conditions and the following disclaimer.
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11 # 2. Redistributions in binary form must reproduce the above copyright
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12 # notice, this list of conditions and the following disclaimer in the
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13 # documentation and/or other materials provided with the distribution.
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14 #
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15 # THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 # ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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25 # SUCH DAMAGE.
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26 #
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27 # Most of this is derived from the extremely helpful post at
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28 # http://www.domoticaforum.eu/viewtopic.php?f=71&t=7489
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29 #
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30
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31 import datetime
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32 import exceptions
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33 import re
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34 import serial
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35 import sys
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36 import time
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37
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38 baudtable = {'0' : 300, '1' : 600, '2' : 1200, '3' : 2400, '4' : 4800, '5' : 9600, '6' : 19200}
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39 parsere = re.compile('([0-9A-Z](\.[0-9A-Z]){1,})\((.*)\)')
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40
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41 class Error(exceptions.BaseException):
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42 pass
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43
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44 class IEC1107Reading(object):
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45 def __init__(self, port, force300bps = True):
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46 # Open port
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47 s = serial.Serial(port, baudrate = 300, bytesize = 7, parity = 'E', stopbits = 1)
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48 s.timeout = 2.5
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49
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50 # Send ident message
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51 s.write('/?!\r\n')
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52 rtn = s.readline()
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53 if len(rtn) == 0:
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54 raise Error('No reply to probe')
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55 if len(rtn) < 6 or rtn[0] != '/' or rtn[-1] != '\n' or rtn[-2] != '\r':
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56 raise Error('Invalid line "%s"' % (rtn))
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57
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58 rtn = rtn.strip()
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59 self.mfg = rtn[1:4]
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60
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61 if self.mfg[2].isupper():
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62 self.restime = 0.2
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63 else:
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64 self.restime = 0.02
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65
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66 if force300bps:
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67 self.baudid = '0'
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68 else:
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69 self.baudid = rtn[4]
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70 if self.baudid not in baudtable:
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71 raise Error('Invalid baud rate %c from "%s"' % (selfbaudid, rtn))
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72 else:
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73 self.baud = baudtable[self.baudid]
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74
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75 if rtn[5] == '/':
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76 self.mode = rtn[6]
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77 self.mfg = rtn[7:]
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78 else:
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79 self.mode = None
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80 self.mfg = rtn[5:]
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81
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82 # Send ACK/option message
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83 # Byte Meaning
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84 # 0 ACK (0x06)
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85 # 1 Protocol character ('0' = normal, '1' = secondary, '2' = HDLC protocol)
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86 # 2 Baud rate ID ('0', '1', etc)
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87 # 3 Mode control('0' = read data, '1' = device prog)
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88 s.write('\x060%c0\r\n' % (self.baudid))
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89
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90 time.sleep(self.restime)
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91 s.setBaudrate(self.baud)
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92
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93 lines = []
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94 cksum = 0
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95
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96 # Read STX
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97 head = s.read(1)
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98 if len(head) == 0:
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99 raise Error('No reply to query')
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100 if head != '\x02':
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101 raise Error('Invalid reply header 0x%02x' % (ord(head)))
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102
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103 # Read result lines
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104 while True:
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105 line = s.readline()
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106 if len(line) == 0:
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107 raise Error('Timeout during message')
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108
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109 cksum ^= reduce(lambda x, y: x ^ y, map(ord, line))
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110 if line.strip() == '!':
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111 break
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112 lines.append(line)
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113
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114 # Read trailer
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115 fin = s.read(2)
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116 if len(fin) != 2:
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117 raise Error('Timeout reading trailer')
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118 if fin[0] != '\x03':
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119 raise Error('Trailer malformed, expected 0x03, got 0x%02x' % (ord(fin[0])))
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120
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121 # Validate checksum
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122 cksum ^= ord(fin[0])
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123 if cksum != ord(fin[1]):
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124 raise Error('Checksum mismatch, expected 0x%02x, got 0x%02x' % (cksum, ord(fin[1])))
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125 self.rawreading = lines
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126 del s
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127
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128 self.parse()
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129 self.readdate = datetime.datetime.now()
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130
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131 def parse(self):
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132 for l in self.rawreading:
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133 m = parsere.match(l)
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134 if m == None:
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135 raise Error('Unable to parse result \"%s\"' % (l))
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136
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137 (code, xxx, value) = m.groups()
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138 if code == 'C.1':
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139 self.meterid, date = value.split('(')
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140 # XXX: The meter I have is an hour slow
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141 self.meterdate = datetime.datetime.strptime(date, '%H:%M %d-%m-%y')
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142 elif code == '1.8.0':
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143 self.importWh = int(value[0:-3])
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144 elif code[0:4] == '1.8.':
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145 # Differing tarrifs which I don't care about
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146 pass
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147 elif code == '2.8.0':
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148 self.exportWh = int(value[0:-3])
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149 else:
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150 print 'Unknown code', code
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151
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152 def __str__(self):
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153 return 'Time: %s, Meter: %s, Import: %d Wh, Export: %d Wh' % (self.readdate.strftime('%Y/%m/%d %H:%M'),
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154 self.meterid, self.importWh, self.exportWh)
0
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155 def main():
1
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156 if len(sys.argv) != 2:
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157 print 'Bad usage'
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158 print '\t%s portname' % (sys.argv[0])
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159 sys.exit(1)
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160
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161 res = IEC1107Reading(sys.argv[1])
2
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162 print res
5
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163
0
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164 if __name__ == '__main__':
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165 main()
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166
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167 # Meter number is 1288004
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168 # 1.8.0 is import
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169 # 1.8.1 is ??
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170 # 1.8.2 is ??
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171 # 1.8.3 is ??
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172 # 2.8.0 is export
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173
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174 # C.1(12880041.0(22:25 18-11-13)
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175 # 1.8.1(0000000597*Wh)
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176 # 1.8.2(0000000000*Wh)
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177 # 1.8.3(0000264238*Wh)
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178 # 1.8.0(0000264835*Wh)
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179 # 2.8.0(0000511354*Wh)
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180
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181 # ==> /?!<0D><0A>
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182 # <== /ACE5SMLCD
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183 # ==> <06>050<0D><0A>
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184 # <== -- STX --
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185 # <== C.1(12880041.0(22:48 18-11-13)
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186 # <== 1.8.1(0000000597*Wh)
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187 # <== 1.8.2(0000000000*Wh)
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188 # <== 1.8.3(0000264460*Wh)
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189 # <== 1.8.0(0000265057*Wh)
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190 # <== 2.8.0(0000511354*Wh)
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191 # <== !
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192 # <== -- ETX --
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193 # <== -- BCC --