diff --git a/config.json b/config.json
index 47ac94d..f8fa4a0 100644
--- a/config.json
+++ b/config.json
@@ -1,12 +1,14 @@
 {
   "sensors": {
     "0":{
+      "name": "inside",
       "BCM": 20,
       "GPIO": 20,
       "header-pin": 38,
       "pre-resistance": 9770.0
     },
     "1":{
+      "name": "outside",
       "BCM": 26,
       "GPIO": 26,
       "header-pin": 37,
@@ -82,5 +84,43 @@
   },
   "pwm-defaults":{
     "frequency": 25000
+  },
+  "activated-channels": [ 0, 1],
+  "interval": 1.0,
+  "use_difference": false,
+  "thresholds-for": "inside",
+  "thresholds": {
+    "off":{
+      "temp": 25,
+      "diff": 5,
+      "fan-up": false,
+      "fan-low": false,
+      "pwm-up": 0.0,
+      "pwm-low": 0.0
+    },
+    "33%": {
+      "temp": 35,
+      "diff": 15,
+      "fan-up": false,
+      "fan-low": true,
+      "pwm-up": 33.0,
+      "pwm-low": 33.0
+    },
+    "66%": {
+      "temp": 45,
+      "diff": 25,
+      "fan-up": true,
+      "fan-low": true,
+      "pwm-up": 100.0,
+      "pwm-low": 66.0
+    },
+    "100%": {
+      "temp": 100,
+      "diff": 50,
+      "fan-up": true,
+      "fan-low": true,
+      "pwm-up": 100.0,
+      "pwm-low": 100.0
+    }
   }
 }
\ No newline at end of file
diff --git a/src/service.py b/src/service.py
new file mode 100644
index 0000000..91ec9a4
--- /dev/null
+++ b/src/service.py
@@ -0,0 +1,49 @@
+from config import Config
+import time
+from threading import Thread
+from temperature import Temperature
+import graphitesend
+from lowlevel import LowLevel
+
+
+class Service(object):
+    def __init__(self):
+        self.__cfg = Config()
+
+        pass
+
+    def run(self):
+        interval = self.__cfg.get_data()["interval"]
+        t = time.time()
+        while True:
+            t = time.time()
+            time.sleep(t + interval - time.time())
+            thread = Thread(self.work)
+            thread.start()
+        pass
+
+    def work(self):
+        # get sensor data
+        channels = self.__cfg.get_data()["activated-channels"]
+        results = []
+        for c in channels:
+            results.append(Temperature(c).read())
+
+        # check thresholds
+        thresholds = self.__cfg.get_data()["thresholds"]
+        sensors = self.__cfg.get_sensors_dict()
+        channel = -1
+        for k in sensors:
+            if sensors[k]["name"] == self.__cfg.get_data()["thresholds-for"]:
+                channel = int(k)
+        if k < 0:
+            raise RuntimeError("fuck.")
+        for threshold in thresholds:
+            if results[channel] < threshold["temp"]:
+                LowLevel().lower_fan(threshold["fan-low"])
+                LowLevel().lower_fan_pwm(threshold["pwm-low"])
+                LowLevel().upper_fan(threshold["fan-up"])
+                LowLevel().upper_fan_pwm(threshold["pwm-up"])
+                break
+        pass
+
diff --git a/src/temperature.py b/src/temperature.py
index 7baf858..888a9f8 100644
--- a/src/temperature.py
+++ b/src/temperature.py
@@ -4,7 +4,8 @@ from decimal import *
 from lowlevel import LowLevel
 from config import Config
 
-class Temperature:
+
+class Temperature(object):
     def __init__(self, channel):
         self.__channel = channel
         self.__cfg = Config()