Virtuabotixrtc.h Arduino Library May 2026

Use VirtuabotixRTC if you already have a DS1302 module and need a 5-minute setup. Use RTClib for long-term, high-accuracy projects. Final Project: Internet-Free Alarm Clock Let's tie everything together with a practical project. This code will turn on an LED (or relay) at a specific time.

If you have ever built an Arduino project that involves logging data, controlling appliances based on the clock, or creating a digital clock, you have faced a fundamental challenge: How does the Arduino know what time it is? virtuabotixrtc.h arduino library

// Check if we are within working hours (9 AM to 5 PM) if (myRTC.hours >= 9 && myRTC.hours < 17) Use VirtuabotixRTC if you already have a DS1302

void setup() Serial.begin(9600); if (!SD.begin(10)) Serial.println("SD Card failed!"); return; This code will turn on an LED (or relay) at a specific time

#include <virtuabotixRTC.h> virtuabotixRTC myRTC(7, 6, 5); int alarmPin = 13; // Built-in LED bool alarmTriggered = false;

// Check if current time matches alarm time if (!alarmTriggered && myRTC.hours == alarmHour && myRTC.minutes == alarmMinute && myRTC.seconds == 0)