diff --git a/config.json b/config.json
index 41ec195..221b362 100644
--- a/config.json
+++ b/config.json
@@ -87,7 +87,7 @@
   },
   "activated-channels": [ 0, 1],
   "interval": 1,
-  "use_difference": false,
+  "use_difference": true,
   "thresholds-for": "inside",
   "thresholds": {
     "off":{
@@ -123,4 +123,4 @@
       "pwm-low": 100.0
     }
   }
-}
\ No newline at end of file
+}
diff --git a/scripts/pwm.py b/scripts/pwm.py
old mode 100644
new mode 100755
index ceb1be4..29fc37c
--- a/scripts/pwm.py
+++ b/scripts/pwm.py
@@ -1,10 +1,11 @@
+#! /usr/bin/env python3
 #import RPIO
 import RPi.GPIO as GPIO
 import time
 from datetime import datetime
 from datetime import timedelta
-switch = 15
-pwm = 14
+switch = 17
+pwm = 18
 fan_speed =18
 #RPIO.setup(switch, RPIO.OUT)
 
@@ -17,7 +18,14 @@ GPIO.setup(switch, GPIO.OUT)
 GPIO.setup(pwm, GPIO.OUT)
 fan = GPIO.PWM(pwm, 25000)
 
-GPIO.setup(fan_speed, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+uswitch = 22
+upwm = 23
+
+GPIO.setup(uswitch, GPIO.OUT)
+GPIO.setup(upwm, GPIO.OUT)
+ufan = GPIO.PWM(pwm,25000)
+
+# GPIO.setup(fan_speed, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 global last_ts
 global current_ts
 global diff
@@ -45,29 +53,44 @@ def speed_callback(channel):
 #    print("{:d}     | \t{:.2f} | \t{} | \t{} | \t{}".format(diff.microseconds, rpm, diff, current_ts, last_ts), end="\r")
     
 
-GPIO.add_event_detect(fan_speed, GPIO.FALLING, callback=speed_callback)
-
+# GPIO.add_event_detect(fan_speed, GPIO.FALLING, callback=speed_callback)
+import sys
 try:
     GPIO.output(switch, True)
+    GPIO.output(uswitch, True)
     step = 10
     c = 0
     direction = 1
     diff=timedelta()
     fan.start(c)
+    ufan.start(c)
     while True:
-        if c == 100:
-            direction = -1
-        elif c == 0:
-            direction = 1
-        c += step*direction
-        fan.ChangeDutyCycle(c)
+        l = input().strip().split(" ")
+        if len(l) == 2:
+            if int(l[0]) < 0:
+                GPIO.output(switch, False)
+            else:
+                GPIO.output(switch, True)
+                fan.ChangeDutyCycle(100 - int(l[0]))
+            if int(l[1]) < 0:
+                GPIO.output(uswitch, False)
+            else:
+                GPIO.output(uswitch, True)
+                ufan.ChangeDutyCycle(100 - int(l[1]))
+    #    if c == 100:
+    #        direction = -1
+    #    elif c == 0:
+    #        direction = 1
+    #    c += step*direction
+#        fan.ChangeDutyCycle(c)
 #        print("{}                                                ".format(c))
-        time.sleep(5)
+    # while True:
+        time.sleep(0.1)
 except KeyboardInterrupt:
     pass
 finally:
-    fan.stop()
-    GPIO.output(switch, False)
+    #fan.stop()
+    #GPIO.output(switch, False)
     GPIO.cleanup()
 
 
diff --git a/scripts/test.py b/scripts/test.py
old mode 100644
new mode 100755
index 3a13bc0..79c93cf
--- a/scripts/test.py
+++ b/scripts/test.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#! /usr/bin/env python3
 
 import spidev
 import time
@@ -9,12 +9,12 @@ tnom = 25
 rnom = 10000.0
 corr = 4800
 temp_gpio = { 
-        0: {
-            "BCM": 20,
-            "Rk": 9770.0 #9770,
-        },
         1: {
             "BCM": 26,
+            "Rk": 9770.0 #9770,
+        },
+        0: {
+            "BCM": 20,
             "Rk": 10000.0
             } 
         }
diff --git a/src/lowlevel.py b/src/lowlevel.py
index db0424e..c6429e0 100644
--- a/src/lowlevel.py
+++ b/src/lowlevel.py
@@ -41,31 +41,31 @@ class LowLevel(metaclass=Singleton):
         self.__spi.cshigh = True
 
     def retrieve_adc(self, channel):
-        if channel > 7 or channel < 0:                   
+        if channel > 7 or channel < 0:
             return None
         pin = self.__cfg.get_sensors_dict()[str(channel)]["BCM"]
-        GPIO.output(pin, True)     
+        GPIO.output(pin, True)
         hchbit = channel >> 2
-        lchbits = channel & 0x03                         
+        lchbits = channel & 0x03
         to_send = [hchbit | 0x06, lchbits << 6, 0x00]
         self.__activate()
         r = self.__spi.xfer(to_send)
         self.__deactivate()
-        GPIO.output(pin, False)    
-        highbyte = r[1]                                  
-        lowbyte = r[2]                                   
-        value = (highbyte << 8) | lowbyte                
+        GPIO.output(pin, False)
+        highbyte = r[1]
+        lowbyte = r[2]
+        value = (highbyte << 8) | lowbyte
         return value
 
     def upper_fan(self, on):
         GPIO.output(self.__cfg.get_pwm_upper()["on-off"]["BCM"], on)
 
     def upper_fan_pwm(self, percent):
-        self.__pwmu.ChangeDutyCycle(percent)
+        self.__pwmu.ChangeDutyCycle(100 - percent)
 
     def lower_fan(self, on):
         GPIO.output(self.__cfg.get_pwm_lower()["on-off"]["BCM"], on)
 
     def lower_fan_pwm(self, percent):
-        self.__pwml.ChangeDutyCycle(percent)
+        self.__pwml.ChangeDutyCycle(100 - percent)