It's me again!
Don't you agree three days were barely enough for meeting 200 people? As promised I give you the solution to the #SteemFest Crypto Challenge. We had six QR codes in total which lead to six different puzzles you had to solve in order to win the prize of 1000 STEEM.

Let's get started.

QR CODE I

Aipgsqi xs xli WxiiqJiwx qc jvmirh. Viehmrk xlmw mw csyv jmvwx xewo. Rsx xlex levh vmklx? M ampp kmzi csy xli jmvwx pixxiv csy riih.

K

Here we have a caesar cipher. When you shift the letters you will get the following message:
Welcome to the SteemFest my friend. Reading this is your first task. Not that hard right? I will give you the first letter you need.

G

QR CODE II

As morse code right! But you might knew it. How come it didn't work to some? Turn it 180 degree and you get ROUND TWO

QR CODE III

Things are getting stranger and stranger. You seen this chars? Right! WINDINS
Following message comes out: Where are we? Where? A Like Amsterdam!

QR CODE IV

Oh lord, now chemistry as well? What's wrong with this guy....
You need some Phenylalanine! or at least PH. The first two letters

QR CODE V

What are the next two letters in the following series. End now?
W A T N T L I T F S _ _
This was pretty simple but complicated the same. What are the last two chars? Look at every first char of each word. BINGO! EN are the last two chars

QR CODE VI

This was kinda hard I think. A train? What train? A Shinkansen. An E2 Series Shinkansen! And here we are. The last two chars E and 2

Final solution

If you look closely at every single letter we got you might find the correct word.

GRAPHENE 2

Congratulation @danea

You manages to solve this puzzle and earned 1000 STEEM. I am happy you made it and had fun.

Thank you all for coming to the SteemFest! Was a pleasure to meet you all and see you next year. Use the hashtag #steemfest-reconnect to stay in touch with all these wonderful people.

Cheers and see you on the next crypto challenge!
@timsaid

Update

Drop me a comment if you were at the SteemFest so I can follow you and we stay in touch!