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Andreas Happel on Hacking the Tassimo - Part 2: Breaking the Code

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Hello, I’m from Germany and own and I own a Tassimo for two years now.
Since the very first day I have been very curious about the Tassimo's barcode and scanner.
I was aware of the facts, the the temperature, the amount of water and something like pre-soak has to be
encrypted in the barcode....

But today I took the time to search the web for infos, especially the barcode-type.

After I found out what I wanted to know to generate the barcode by software on my own, I needed
to learn more about the structure of it.

So I came across this homepage and couldn’t believe what I read Smile

Since it is time for bed for me, I just wanted to post some measurements I’ve made.
But the longer I study them, the more I believe there might be some additional coding inside the Tassimo.
Even if it’s only a simple arithmetic operation, like a binary subtraction with a fixed value...

And two other circumstances get my attention:

First: the codes in my area do have a leading "0", they are much smaller than the values you are working with.
So there are less significant/correction bits.

The second point is: I have measured one beverage with a "mock objec" and after that with a real T-Disc
(Twinings Earl Grey Tea). In the first case there is an amount of 193ml of water, in the second case 173ml.
So the beverage-volume is heavily dependent on the resistance the Disc-object oppose to the waterflow
(the Tea-Disc has been only humid after usage, in case you wonder if the water could have remained in it).

One only should compare the values among same conditions (measured values with measured values, to find
code-similarities in equal products).
While comparison with the values in the patent,
one should be a bit more liberal, possibly interpretive.
We don’t know under which conditions this values may be reached exactly.
The patentvalues can only show a tendency, a rough benchmark.

Here some measurements I made today, I hope there could be something to help you!


Caffè Crema Vollmudig intensiv -> 064255 (1100100011001)
Twinings Grüner Tee mit Minze -> 032544 (110010110110) 187ml 84°C
Twinings Earl Grey -> 032711 (110011000111) 193ml 86°C (with a real T-Disc 173 ml)
Twinings Waldfrucht -> 023573 (100100110101) 185ml 86°C



Kind regards and thanks for your great work

Andreas Happel

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