Suggestion for an Android tablet for a kiosk

I am developing a custom kiosk for a certain application of mine. I needed a suggestion regarding which Android tablet I can use which has a hardware interface that I can connect to my micro-controller board for interfacing. My Android app should be able to send and receive data to and from the micro-controller. So, I need to know which readily available tablet I can use which has a hardware interface (USB or some other serial port) .