raspi/customs/usr/local/bin/sensors

   1 #!/usr/bin/python
   2
   3 import argparse
   4 import os
   5 import sys
   6 import re
   7 import getopt
   8 import glob
   9 import subprocess
  10 import datetime
  11
  12 VERSION=0.2
  13
  14 ALTITUDE=0
  15
  16 def parseArguments():
  17
  18     parser = argparse.ArgumentParser(description='Raspberry Pi sensors reader.')
  19     parser.add_argument('-l', '--log', dest='log', help='single line output for log',action='store_true')
  20     parser.add_argument('-a', '--altitude', dest='altitude', help='altitude for computing relative pressure', default=300)
  21
  22     args = parser.parse_args()
  23
  24     return args;
  25
  26
  27 def usage():
  28     print "sensors", VERSION, "print Raspberry Pi sensor data"
  29     print
  30     print "Usage: sensors [-l] [-a alt]"
  31     sys.exit(1)
  32
  33 def readfile(filename):
  34     f = open(filename)
  35     try:
  36        data = f.read(1000)
  37     finally:
  38        f.close()
  39     return data
  40
  41 def f2s(data):
  42     return '{0:.1f}'.format(data);
  43
  44 def raspi():
  45     cpudata = cpu_data(0)
  46     rpidata = get_raspi_data()
  47     print('temp=%s\'C volt=%sV freq=%sMHz %s' % (rpidata[0], rpidata[1], str(cpudata[1]), cpudata[2]))
  48
  49 def get_raspi_data():
  50     vdata = subprocess.check_output(['/opt/vc/bin/vcgencmd','measure_volts'])
  51     vm = re.search('volt=(\d+\.\d+()).*', vdata);
  52     v = vm.group(1)
  53     tdata = subprocess.check_output(['/opt/vc/bin/vcgencmd','measure_temp'])
  54     tm = re.search('temp=(\d+\.\d+).*', tdata)
  55     t = tm.group(1)
  56     return [t, v, tdata, vdata]
  57
  58 def cpu_data(cpu):
  59     data = readfile('/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq')
  60     freq = int(data) / 1000
  61     gov = readfile('/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor').strip()
  62     return ['cpu' + str(cpu), freq, gov, data]
  63
  64 def w1():
  65     w1devices = glob.glob('/sys/bus/w1/devices/*/w1_slave')
  66     for w1dev in w1devices:
  67        t = get_w1_data(w1dev)
  68        print('temp=%s\'C' % f2s(t[1]))
  69
  70 def get_w1_data(path):
  71     data = readfile(path)
  72     m = re.search(".*crc=\\w\\w YES\n.*t=(\\d+)", data)
  73     if not m:
  74        return [path, None, data];
  75
  76     t = float(m.group(1)) / 1000.0
  77     return [path, t, data]
  78
  79 def bmp085():
  80     bmpdevices = glob.glob('/sys/bus/i2c/drivers/bmp085/*-*')
  81     for bmpdev in bmpdevices:
  82       data = get_bmp085_data(bmpdev)
  83       print('temp=%s\'C press=%shPa relPress=%shPa' % (f2s(data[1]),f2s(data[2]),f2s(data[3])))
  84
  85
  86 def get_bmp085_data(path):
  87     global ALTITUDE
  88     tdata = readfile(path + "/temp0_input")
  89     t = float(tdata) / 10.0
  90
  91     pdata = readfile(path + "/pressure0_input")
  92     p_abs = float(pdata) / 100.0
  93     p_rel = (p_abs*9.80665*ALTITUDE) / (287*(273+t+(ALTITUDE/400))) + p_abs
  94     p_rel_2 = p_abs  + ALTITUDE / 8.3
  95     return [path, t, p_abs, p_rel, p_rel_2, tdata, pdata]
  96
  97
  98 def get_date():
  99     today = datetime.datetime.now()
 100     return today.strftime('%Y-%m-%d %H:%M')
 101
 102
 103 def log_line():
 104     result = get_date();
 105
 106     rdata = get_raspi_data()
 107     result += ' ' + rdata[0];
 108
 109     w1devices = glob.glob('/sys/bus/w1/devices/*/w1_slave')
 110     for w1dev in w1devices:
 111        t = get_w1_data(w1dev)
 112        result += ' ' +  f2s(t[1])
 113
 114     bmpdata = get_bmp085_data('/sys/bus/i2c/drivers/bmp085/1-0077')
 115     result += ' ' +  f2s(bmpdata[2])
 116     return result
 117
 118 def main():
 119     global ALTITUDE
 120
 121     args = parseArguments()
 122     ALTITUDE = int(args.altitude)
 123
 124     if (args.log):
 125       print log_line()
 126       return
 127
 128     print "Internal: "
 129     raspi()
 130     bmp085()
 131     print "External: "
 132     w1()
 133
 134 if  __name__ =='__main__':main()