Hi Matthias
I found your app today in the playstore. So i tried to connect to my “leapfrog creatr HS-Printer”. I was not successful. There is a message that says “No USB Device found”. What do i need to do, that it works?
Sorry for my bad english. 
no problem. you can write in German as well (or directly talk with me via email) .
Did you read the FAQ ? : http://gcodeprintr.dietzm.de/FAQ-de.html#detecterror
@Simon_L does it work now ? If not, could you send me the console output (with debug logging enabled) by mail ?
Hi Mathias
Now it works. I had to buy a OTG USB-Cable to connect with the computer.
You have made a nice app to move our Cratr HS. Nice Job Mathias!