Step 1.) Identify the key that has been pressed.

Step 2.) Identify if the control or alt key has been pressed,

accordingly selecting the correct alphabet or letter to be sent

Step 3.) The data goes to the phone through the USB OTG

Cable and the phone thinks that an external keyboard is

sending that data

Step 4.) The data passes through the Swiftkey keyboard autocorrect

engine for physical keyboards, if a space is pressed

the closest prediction will be written onto the app that converts

the text to speech.

Step 5.) A simple offline android text to speech engine converts

the text to speech and then speaks it out through the

phone speaker.