Addition of an external EEPROM for extra keystroke capacity.

Using a Bluetooth module to detect proximity of the button owner's mobile phone so that the USB button is only enabled when its owner is near.

The possibilities are fairly broad including:

Requires NO drivers (or custom software) for Windows/Linux etc.

Can send USB Consumer Device functions (e.g.

Can send USB System Control codes (Power off, sleep, wake) to your PC.

Support for 256 x 8-bit 'registers' to record state.For example, Compare to value, Jump on zero, etc. Up to 127 keystrokes can be recorded and played back.Programmed by using an ordinary text editor as a display (for example, gedit on Linux, or Notepad on Windows).One-button design (a rotary encoder with a built in switch).All you need is a text editor like Notepad (for Windows) or gedit (for Linux).

The button (which is really a rotary encoder with a built-in push button switch) is programmed using an innovative and slightly quirky interface that does not require any custom software to be installed on your computer. When you press the button those keystrokes are 'replayed' over a USB connection. PUB! is a Programmable USB Button on which you can program a sequence of keystrokes.

Programmable red button