2 # Copyright (c) 2015, Tobias Mueller tm(at)tm3d.de
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3 # All rights reserved.
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5 # Redistribution and use in source and binary forms, with or without
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6 # modification, are permitted provided that the following conditions are
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9 # * 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 # * 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
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15 # * All advertising materials mentioning features or use of this
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16 # software must display the following acknowledgement: This product
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17 # includes software developed by tm3d.de and its contributors.
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18 # * Neither the name of tm3d.de nor the names of its contributors may
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19 # be used to endorse or promote products derived from this software
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20 # without specific prior written permission.
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22 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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23 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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24 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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25 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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26 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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27 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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28 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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29 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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30 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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31 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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32 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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41 def owcom(dev,send,rc):
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43 f=open("/sys/bus/w1/devices/%s/rw" %(dev),"r+b",0)
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44 f.write("".join(map(chr, send)))
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46 res=map(ord,f.read(rc))
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61 lscrc=(lscrc>>1)^0x8c
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68 for c in s.lower()[:]:
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69 if not((c) in ['0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f','-']):
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85 l=subprocess.check_output("ls /sys/bus/w1/devices/", shell=True)
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88 for g in (l.split("\n")):
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96 print "No 26 1-Wire Device found"
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98 n=int(raw_input("No. of Device (28-Device will get automatically): "))
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100 if (n>dc-1)or(n<0):
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103 config=owcom(s,[0x85],17)
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105 s2="%02x-%02x%02x%02x%02x%02x%02x" % (config[9],config[15],config[14],config[13],config[12],config[11],config[10])
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106 print("Second Device: %s" %( s2))
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107 f=open("/sys/bus/w1/devices/%s/w1_slave" %(s2),"rb",0)
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108 res=f.read().split(" ")
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110 Press=((int(res[0],16)+int(res[1],16)*256)/16.0*3.2+700)
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111 owcom(s,[0x4E,0x00,0x01],0)
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117 p=owcom(s,[0xBE,0x00],10)
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119 T=((p[1]+p[2]*256)/256.0)
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121 RH=((p[3]+p[4]*256)/100.0)
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123 RH=(((p[3]+p[4]*256)/ 500.0 - 0.16) / 0.0062) / (1.0546 - 0.00216*T);
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125 print("Temperatur: %f °C" %(T));
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126 print("Luftfeuchte: %f %%" %(RH));
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127 print("Druck (absolut): %f hPa" %(Press));
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128 h=float(raw_input("Höhe über Meerespiegel in m: "))
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129 P0=Press/((1-h/44330)**5.255)
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130 print("Druck (normalisiert): %f hPa" %(P0));
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