How To Control Usb Hid Keyboard's Caps Lock "from" Android?

I have a usb hid keyboard connected to my android device. Now i have a one way communication, from keyboard to android. But i am looking for the opposite way to control keyboard fr

Solution 1:

Provided you're developing for a version of Android with the USB Host API (which it sounds like you are) you ought to be able to write some code to temporarily grab the keyboard's interface from the kernel, send the appropriate data to set caps lock and then release the interface so that the HID driver will pick it up.