Tasmota/lib/NewPing-1.9.1/examples/TimerExample/TimerExample.pde

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// ---------------------------------------------------------------------------
// While the NewPing library's primary goal is to interface with ultrasonic sensors, interfacing with
// the Timer2 interrupt was a result of creating an interrupt-based ping method. Since these Timer2
// interrupt methods were built, the library may as well provide the functionality to use these methods
// in your sketches. This shows how simple it is (no ultrasonic sensor required). Keep in mind that
// these methods use Timer2, as does NewPing's ping_timer method for using ultrasonic sensors. You
// can't use ping_timer at the same time you're using timer_ms or timer_us as all use the same timer.
// ---------------------------------------------------------------------------
#include <NewPing.h>
#define LED_PIN 13 // Pin with LED attached.
void setup() {
pinMode(LED_PIN, OUTPUT);
NewPing::timer_ms(500, toggleLED); // Create a Timer2 interrupt that calls toggleLED in your sketch once every 500 milliseconds.
}
void loop() {
// Do anything here, the Timer2 interrupt will take care of the flashing LED without your intervention.
}
void toggleLED() {
digitalWrite(LED_PIN, !digitalRead(LED_PIN)); // Toggle the LED.
}