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#include <Arduino.h> volatile int button_count; // Trigger int totalLoops; // counts the number of triggering of the alarm #define LED_PIN LED_BUILTIN #define PIN_BOTON 2 enum system_state { LED_OFF, LED_ON }; system_state state = LED_OFF; void switch_OFF(void) { digitalWrite(LED_PIN, LOW); state = LED_OFF; Serial.print("\n[LED_OFF]\n"); } void switch_ON(void) { digitalWrite(LED_PIN, HIGH); state = LED_ON; Serial.print("\n[LED_ON]\n"); } void button_isr (void) { button_count++; Serial.print("\nButton has been pressed (%d times)!!!!\n", button_count); if(state == LED_OFF) { switch_ON(); // Turn off LED } else { // state == LED_ON switch_OFF(); // Turn on LED } } void setup() { Serial.begin(9600); while (!Serial); delay(100); Serial.println("[SYSTEM START]"); // Configure LED output pinMode(LED_PIN, OUTPUT); digitalWrite(LED_PIN, LOW); // Configure button pin input pinMode(PIN_BOTON, INPUT_PULLUP); attachInterrupt(digitalPinToInterrupt(PIN_BOTON), button_isr, RISING); } void loop() { totalLoops++; delay(100); // Do whatever... Serial.print("..%d\n", totalLoops); }
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