Initial version

plugins/other/read_serial_temperature

@@ -0,0 +1,53 @@
+#!/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 System'
+  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()
+
+