* = potentially a hit on another surface than the pellets in the hopper

44              2018-10-17 11:08:39
33              2018-10-17 11:24:40 *
41              2018-10-17 11:25:00
49              2018-10-17 12:01:03
42              2018-10-17 12:01:23
36              2018-10-17 13:41:49 *
340376          2018-10-17 13:43:09 ???
40              2018-10-17 13:43:29
33              2018-10-17 14:06:50 *
40              2018-10-17 14:07:10
32              2018-10-17 14:56:13 *
40              2018-10-17 14:56:33
30              2018-10-17 15:24:35 *
39              2018-10-17 15:24:55
32              2018-10-17 15:56:57 *
41              2018-10-17 15:57:17
35              2018-10-17 16:34:59 *
41              2018-10-17 16:35:39
33              2018-10-17 17:33:42 *
41              2018-10-17 17:34:02
49              2018-10-17 18:00:44
41              2018-10-17 18:04:44
49              2018-10-17 18:11:25
42              2018-10-17 18:12:25
52              2018-10-17 18:39:46
44              2018-10-17 18:40:06
36              2018-10-17 18:57:48 *
42              2018-10-17 18:58:08
69              2018-10-17 19:39:10
41              2018-10-17 19:39:30
68              2018-10-17 19:41:10
41              2018-10-17 19:41:30
48              2018-10-17 21:22:16
41              2018-10-17 21:27:56
48              2018-10-17 23:55:45
340385          2018-10-18 00:00:26 ???
45              2018-10-18 00:00:46
36              2018-10-18 00:31:48 *
44              2018-10-18 00:32:08
36              2018-10-18 01:02:49 *
44              2018-10-18 01:03:09
52              2018-10-18 06:28:29
44              2018-10-18 06:35:09
37              2018-10-18 07:48:54 *
44              2018-10-18 07:49:34
340395          2018-10-18 08:13:15 ???
46              2018-10-18 08:13:35

#function to calculate deviation between current and previously read value
def deviation(x,y):
    diff = abs(float(x)-float(y))
    avg = (float(x)+float(y))/2
    return (diff/avg)

distance = int(round(duration*34000/2))
            if (distance != lastread):
                dev = deviation(lastread,distance)
            if (dev > allowableError):
                #save last entry, only if deviation is big enough.
                lastread = distance
                saveData(distance)
                print str(distance) + "tt" + str(datetime.datetime.fromtimestamp(time.time()).strftime('%Y-%m-%d %H:%M:%S'))