Arduino interrupt tutorial with example demonstration of how to use external interrupt and pin change interrupt in arduino.

Arduino and external interrupts ATMega processors enable interrupts from pins, timers, USARTS, the ADC etc. For each of these interrupt sources a dedicated interrupt vector exists. An example is ...

RFID tag has been scanned by the Qwiic RFID Reader. This is not a "pure" Qwiic example as you'll need a wire attached to pin 3 on your Arduino.