--- a/web/config.py	Thu Oct 11 19:21:11 2012 +0800
+++ b/web/config.py	Sat Oct 13 20:22:50 2012 +0800
@@ -19,7 +19,7 @@
     'sensor_28 49 BC 1A 03 00 00 54': "Wort",
     'sensor_voltage': 'Voltage',
     'sensor_fridge_setpoint': 'Setpoint',
-    'sensor_fridge_on': 'On',
+    'sensor_fridge_on': 'Cool',
     }
 
 SENSOR_COLOURS = {'Wort': 'e49222', 
@@ -27,7 +27,7 @@
                 'Voltage': '7db5d3aa',
                 'Fridge': '4c40c8',
                 'Setpoint': '39c662',
-                'On': 'd7cedd',
+                'Cool': 'd7cedd',
                 }
 
 

--- a/web/log.py	Thu Oct 11 19:21:11 2012 +0800
+++ b/web/log.py	Sat Oct 13 20:22:50 2012 +0800
@@ -78,7 +78,7 @@
         elif 'fridge_on' in sensor:
             vname = 'fridge_on'
             graph_args.append('DEF:raw%(vname)s=%(rrdfile)s:temp:LAST' % locals())
-            graph_args.append('CDEF:%(vname)s=raw%(vname)s,3,+' % locals())
+            graph_args.append('CDEF:%(vname)s=raw%(vname)s,-0.2,*,3,+' % locals())
         else:
             vname = 'temp%d' % n
             graph_args.append('DEF:raw%(vname)s=%(rrdfile)s:temp:AVERAGE' % locals())
@@ -216,6 +216,10 @@
     if len(entries) != len(lines):
         raise Exception("Keys are not unique")
 
+    if 'sensors' not in entries:
+        # only debug info, it's been recorded
+        return
+
     num_sensors = int(entries['sensors'])
     num_measurements = int(entries['measurements'])