FIxed graphs / inverted the tankFull bit!

controller/sensors.py

@@ -8,7 +8,10 @@ import RPi.GPIO as GPIO
 # Try to read the state of GPIO_PIN_TANKFULL
 GPIO.setmode(GPIO.BCM)
 GPIO.setup(config.GPIO_PIN_TANKFULL, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
-tankFull = GPIO.input(config.GPIO_PIN_TANKFULL)
+
+# tank sensor has inverse logic - 0 when it is full 1 when it is not
+# so we are inverting its value here
+tankFull = !GPIO.input(config.GPIO_PIN_TANKFULL)
 GPIO.cleanup()
 print 'Bacva puna: {}'.format(tankFull)