pitooth-fsr

Allows a force sensitive resistor to act as a Bluetooth keyboard and send a keystroke when depressed.

Usage

• Pair Raspberry Pi with another device as a keyboard (e.g. a mobile phone)
• When the FSR is depressed, s will be transmitted
• Respond to the keystroke on the paired device (e.g. start/stop a timer)

Hardware

• 1 x Pi cobbler
• 1 x FSR
• 1 x USB Bluetooth adapter
• 1 x 10k resistor
• 1 x LED (optional)

LED_PIN = 5
FSR_PIN = 25

Compiling & Installing Dependencies

Bluetooth Keyboard Daemon

cd btkbdd
make
sudo cp btkbdd /usr/local/bin

keystroke

g++ -o keystroke keystroke.c
sudo cp keystroke /usr/local/bin

Running

Start the Bluetooth keyboard daemon:

sudo btkbdd /dev/input/event0 -d

Start the FSR listener:

sudo ./fsr.py