How can i communicate Android device with using com port?
I have discovered what i did wrong. The phone does not support OTG feature, so i could not see serial port by using qt serialport library. If anyone faces this problem, i hope this works for him/her.
Android to Android Communication over USB
As Android supports both USB gadget and USB host interface, it is definitely possible to make communication between two devices over USB OTG. In this case, your one device will become USB Host which will initiate connection. And the other will become USB gadget device. And you will have to write application considering that.
How can I communicate an Android Accessory with a USB Serial Port?
There's an excellent source code made by FTDI Chip, so if you ever need to perform USB/ftdi connections with Android try this application:
FTDI UART TERMINAL
Source code: http://www.ftdichip.com/Android.htm
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