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PiLEDlights

For the Raspberry Pi - Make LEDs blink on SD card/USB storage activity. Also one LED if system is booted and another one to check if processes are running.

Prerequirements

Install pigpio

sudo apt install pigpio

Modified to have 3 LEDs

The ssdled was modified to have 3 different LEDs. One for disc activity, one for heartbeat (it checks if processes are running) and one for system readiness (= booted).

Build

gcc -Wall -O3 -o ssdled ssdled.c -lpigpio -lrt -pthread

Service

gcc -Wall -O3 -o ssdled ssdled.c -lpigpio -lrt -pthread && sudo cp ssdled /usr/bin/ssdled && sudo chmod +x /usr/bin/ssdled && sudo nano /etc/init.d/ssdled

and paste content of ssdled.sh script and then execute

cd /etc/init.d/ && sudo chmod 755 ssdled && sudo update-rc.d ssdled defaults && sudo systemctl start ssdled