MATH: I don't understand the sequence, blue tooth

Using Arduino Project Guidance
#1

I have a bluetooth device.
I was able to hack it so far that i can send values to the device.

The values should go from 0 to 100.
The values i reproduce from what an app sends to the device.

The following 11 commands i reproduced are those:
The first one represents a value of 0, the second 1, then 2 ... up to 10

06:81:66:00:00:4f:c2
06:81:66:00:64:63:e0
06:81:66:00:c8:17:86
06:81:66:01:2c:99:1d
06:81:66:01:90:ff:4a
06:81:66:01:f4:d3:68
06:81:66:02:58:f2:5d
06:81:66:02:bc:4f:f7
06:81:66:03:20:3e:f3
06:81:66:03:84:cb:9d
06:81:66:03:e8:66:b7

Now i try to understand the sequence of this values.
Does anyone has an idea how to find the sequence?

#2

edit your post and alter the subject line to include blue tooth.

#3

Hex notation
00:00 -> 0
00:64 -> 100
00:C8 -> 200
01:2C -> 300
etc.

#4

Thank you sterretje, that's it.

But what could the other four at the end be? maybe a checksum?

#5

Suigor:
Thank you sterretje, that's it.

But what could the other four at the end be? maybe a checksum?

How the Hell do we know?
You've shown neither code nor what devices you're using

#6