text: /*
   * Raspberry Pi LED Blinking using C (wiringPi)
   * https://www.electronicwings.com/raspberry-pi/how-to-use-wiringpi-library-on-raspberry-pi
   * 
   * gcc -o led_blink led_blink.c -l wiringPi
   * sudo ./led_blink
   *
   */
  
  #include <wiringPi.h>
  #include <stdio.h>
  
  /* GPIO26 as per wiringPi, GPIO12 as per BCW, pin no. 32 */
  #define LED 26
  
  int main() {
    wiringPiSetup();            /* initialize wiringPi setup */
    pinMode(LED, OUTPUT);       /* set GPIO as output */
  
    while (1) {
      digitalWrite(LED, HIGH);  /* write high on GPIO */
      delay(1000);
      digitalWrite(LED, LOW);   /* write low on GPIO */
      delay(1000);
    }
  }
  