diff --git a/Control/brewpi/tempSensorSim.py b/Control/brewpi/tempSensorSim.py
index d752ec4..f6964d5 100644
--- a/Control/brewpi/tempSensorSim.py
+++ b/Control/brewpi/tempSensorSim.py
@@ -1,10 +1,14 @@
 from atemperatureSensor import ATemperatureSensor
+import math
 
 
 class TempSensorSim(ATemperatureSensor):
 	def __init__(self, name):
 		super(TempSensorSim, self).__init__(name)
+		self.count = 0
+		self.freq = 0.2
 
 	def temperature(self):
-		return 22.37
+		self.count += 1
+		return 22.37 + 0.1*math.sin(2*math.pi*self.count*self.freq)