diff --git a/brewpi.py b/brewpi.py
index 5bd9806..0f9086a 100644
--- a/brewpi.py
+++ b/brewpi.py
@@ -150,9 +150,12 @@ class TcTask(ATask):
 
 	async def on_process(self):
 		print("{}: Started with interval {} s".format(self.msg_handler.get_key(), self.interval))
+		temp_soll = Value()
 		while True:
-			self.tc.set_theta_soll(self.temp_soll)
-			await self.send({'Soll': self.temp_soll})
+			temp_soll.set(self.temp_soll)
+			if temp_soll.is_changed():
+				self.tc.set_theta_soll(temp_soll.get())
+				await self.send({'Soll': temp_soll.get()})
 			self.tc.process()
 
 			await asyncio.sleep(self.interval)