Virtuabotixrtc.h Arduino Library ⟶ (EXTENDED)
myRTC.writeRegister(0x80, 0x00); // Write 0 to seconds register (clears CH)
The library provides two pathways:
void setup() pinMode(alarmPin, OUTPUT); digitalWrite(alarmPin, LOW); Serial.begin(9600); virtuabotixrtc.h arduino library
Uses a 3-wire synchronous serial communication (SCLK, I/O, and CE/RST). Time Tracking:
#include // Creation of the RTC Object (CLK, DAT, RST) virtuabotixRTC myRTC(6, 7, 8); void setup() Serial.begin(9600); // Set time once: (sec, min, hr, day of week, day of month, month, year) // Day of week: 1=Sunday, 2=Monday, etc. myRTC.setDS1302Time(00, 30, 15, 2, 21, 4, 2026); void loop() // Update time variables from the chip myRTC.updateTime(); // Access individual elements Serial.print("Current Time: "); Serial.print(myRTC.hours); Serial.print(":"); Serial.print(myRTC.minutes); Serial.println(); delay(1000); Use code with caution. Copied to clipboard Problem with code for Arduino using an RTC - Programming Copied to clipboard Problem with code for Arduino
Control a relay (e.g., for lights or a pump) based on the time of day.
The function takes seven arguments in this specific order: RST) virtuabotixRTC myRTC(6
The VirtuabotixRTC.h Arduino library is a testament to the value of focused, minimalist software design. It does not aim to be the most feature-rich RTC library, nor does it support the most modern chips. Instead, it solves a specific problem—communicating with the DS1302 RTC over a 3-wire interface—with remarkable clarity and efficiency. For hobbyists, students, and professionals working on legacy projects or cost-sensitive designs that utilize the DS1302, this library remains a reliable and practical choice. While newer libraries offer more bells and whistles, VirtuabotixRTC endures because it perfectly balances simplicity with functionality, embodying the core philosophy of Arduino: making complex technology accessible to all.