Munin contributed plugins

#!/usr/bin/env python

"""

Paul Wiegmans (p.wiegmans@bonhoeffer.nl)

2009 dec 18

This munin-node plugin reads a temperature value from a serial port, 

provided by a Arduino with temperature sensor.

For details see: http://amber.bonhoeffer.nl/temperatuur/

Linux: "/dev/usb/ttyUSB[n]" or "/dev/ttyUSB[n]"

    first for for RedHat, second form for Debian.

    e.g. "/dev/usb/ttyUSB0"

"""

import sys, serial

# Open named port at "19200,8,N,1", 1s timeout::

def gettemperature():

	ser = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)

	t = 0

	while t<1:

		line = ser.readline().strip()

		if line:

			temp = str(line.split(" ")[0]) # temperature in tenths celsius

			i = len(temp)-1

			temp = temp[:i]  # return only integer value (as a string)

			return temp

			t += 1

	ser.close()

# shamelessly copied from weather_temp_ 

if len(sys.argv) == 2 and sys.argv[1] == "autoconf":

  print "yes"

elif len(sys.argv) == 2 and sys.argv[1] == "config":

  print 'graph_title Temperatuur in de serverruimte'

  print 'graph_vlabel temperature in C'

  print 'graph_category sensors'

  print 'temperature.label temperature'

  print 'graph_info Dit is de temperatuur in het rek in de serverruimte B104'

  print 'graph_scale no'

  # lower limit 10, upper limit 50

  print 'graph_args --base 1000 -l 10 -u 50'

else:

  print 'temperature.value %s' % gettemperature()