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54 lines
1.3 KiB
Python
Executable File
54 lines
1.3 KiB
Python
Executable File
#!/usr/bin/env python
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"""
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Paul Wiegmans (p.wiegmans@bonhoeffer.nl)
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2009 dec 18
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This munin-node plugin reads a temperature value from a serial port,
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provided by a Arduino with temperature sensor.
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For details see: http://amber.bonhoeffer.nl/temperatuur/
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Linux: "/dev/usb/ttyUSB[n]" or "/dev/ttyUSB[n]"
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first for for RedHat, second form for Debian.
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e.g. "/dev/usb/ttyUSB0"
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"""
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import sys, serial
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# Open named port at "19200,8,N,1", 1s timeout::
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def gettemperature():
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ser = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)
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t = 0
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while t<1:
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line = ser.readline().strip()
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if line:
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temp = str(line.split(" ")[0]) # temperature in tenths celsius
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i = len(temp)-1
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temp = temp[:i] # return only integer value (as a string)
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return temp
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t += 1
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ser.close()
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# shamelessly copied from weather_temp_
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if len(sys.argv) == 2 and sys.argv[1] == "autoconf":
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print "yes"
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elif len(sys.argv) == 2 and sys.argv[1] == "config":
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print 'graph_title Temperatuur in de serverruimte'
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print 'graph_vlabel temperature in C'
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print 'graph_category sensors'
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print 'temperature.label temperature'
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print 'graph_info Dit is de temperatuur in het rek in de serverruimte B104'
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print 'graph_scale no'
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# lower limit 10, upper limit 50
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print 'graph_args --base 1000 -l 10 -u 50'
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else:
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print 'temperature.value %s' % gettemperature()
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