Multi-LED control daemon for simultaneous independent GPIO blinking with inotify-based file monitoring.

make clean
make

./ledd

The daemon detaches and runs in the background on its own. Do not append &.

Create control files in /run/ledd/ with pin number as filename:

# Blink GPIO 17 at 500ms interval
echo "500" > /run/ledd/17

# Blink GPIO 27 at 1000ms interval
echo "1000" > /run/ledd/27

# Stop blinking
rm /run/ledd/17
rm /run/ledd/27

• docs/DESIGN.md: Architecture, data structures, and implementation
• docs/EXAMPLES.md: Usage examples and troubleshooting

• Linux kernel with inotify support
• POSIX threads (pthread)
• GPIO sysfs interface (/sys/class/gpio/)
• Write access to /sys/class/gpio/ and /run/ledd/

View daemon logs:

dmesg | grep ledd
logread | grep ledd