This question is an exact duplicate of:
I have a HCL ME U1 tablet. This has a built in USB Type A socket as well as USB Mini Type B socket. I have tested the Type A socket with a standard mouse and it works well. I have also tested it with a GSM 3G dongle and that too is working well. Thus, I believe this shows that the tablet has complete support for USB Host functionality.
However, when I run the USB Host diagnostics tool. It does not detect insertion of any USB device!
My basic aim is to connect an Arduino/Freeduino (which is using Silicon Laboratories CP2102 USB to Serial Converter chip)
I tried various libraries to access these devices, USB Serial Library. However, none of them work ... What do I need to do to access these Arduino devices? Will just rooting the tablet help? Does something else have to be done?