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We have an existing application that we are looking to port from a windows .net complied application to an application that can run on either: raspberry pi or Android platform. Of course the android platform will have in integrated touch screen as part of the OS. The application requires the the touch screen as the user interface, it outputs data to a thermal printer (by way of serial, USB, or ethernet) and reads and writes to Dallas ibutton device. If you think you have these vertical market skills let me know so you can have a look at more detailed specification.