#include "timer.h" // Create the timer instance Timer timer; void helloCallback() { Serial.println("Hello"); } void setup() { Serial.begin(115200); // The timer will repeat every 1000 ms timer.setInterval(1000); // The function to be called timer.setCallback(helloCallback); // Start the timer timer.start(); } void loop() { Serial.println("Loop"); // Update the timer timer.update(); }