Turns your Arduino UNO in to a one-button keyboard using morse code.
The loop function awaits a button press, when detected it measures how long the button was pressed for.
The press duration is converted to either . (dot) or - (dash). The dot/dash is stored in a buffer. When no button press is received in some time, we'll look up the alphabetical index for the current buffer (combination of . and -).
The keycode for the letter A + <index> is sent to the computer over USB.
Prerequisite: install dfu-programmer http://dfu-programmer.github.io/
- Connect a button to
digital pin 6on the Arduino. - Upload the sketch
morse-keyboard.ino. - Connect the two pins closest to the USB port on the Arduino using a jumper cable. An LED will blink.
- In the folder "firmware" execute the shell script
./set-keyboard. - Power cycle the Arduino by disconnecting and connecting the USB cable.
You computer will now recognize the Arduino as a keyboard.
Note: You can't upload a sketch when in "keyboard mode". You can put the Arduino back in serial mode (and allow uploading of sketches) by doing the same procedure but instead running ./set-serial.
Note: Make sure you're using the right firmware for your Arduino... Firmware fiddling can be tricky ;)