Virtuabotixrtc.h Arduino Library [repack] Site

Most users ignore the 31 bytes of NV RAM on the DS1302. However, VirtuabotixRTC.h exposes this through writeRAM() and readRAM() . This RAM is separate from the time registers and retains data as long as backup power is supplied.

: Ensure you have successfully included #include at the absolute top of your sketch file.

While the VirtuabotixRTC library excels at its core task, the Arduino ecosystem offers other robust options, particularly . virtuabotixrtc.h arduino library

: Connect to 3.3V or 5V (depending on the specific module version). GND : Connect to Arduino GND. CLK (Clock) : Serial clock input. DAT (Data) : Bi-directional data line (often labeled I/O). RST (Reset) : Chip enable/reset pin (often labeled CE). Key Library Functions

: For better accuracy and ease of use, experts often recommend the (by NeiroN or Adafruit) or moving to the more precise chip, which uses the I2C interface. Arduino Forum manually install Most users ignore the 31 bytes of NV RAM on the DS1302

// Uncomment to set time (year offset: 25 = 2025) // myRTC.setDS1302Time(0, 49, 14, 4, 21, 4, 25);

The library is a dedicated tool for the Arduino platform, designed to simplify communication with the DS1302 Real-Time Clock (RTC) chip . By providing a streamlined interface for timekeeping, it enables makers to integrate precise date and time tracking into their electronic projects with minimal code. The Role of the DS1302 RTC : Ensure you have successfully included #include at

: A common coding mistake is using a single equals sign ( = ) for comparison instead of a double equals ( == ). For example, use myRTC.hours == 7 to check equality, not myRTC.hours = 7 .

// Example: April 30, 2026, 14:30:00, Wednesday (dayOfWeek = 4) myRTC.setDS1302Time(00, 30, 14, 30, 4, 4, 26);

#include // // Declare the RTC object hooked up to pins 6, 7, and 8 virtuabotixRTC myRTC(6, 7, 8); void setup() Serial.begin(9600); // Start serial communication // IMPORTANT: Set the initial time here. // Seconds, Minutes, Hours, Day of the week, Day of the month, Month, Year // Day of week: 1 = Sunday, 2 = Monday, etc. myRTC.setDS1302Time(00, 15, 20, 1, 27, 4, 2026); // Example: April 27, 2026 at 8:15 PM // Note: After running this once, comment out the line above and re-upload! void loop() // Update the variables with data from the RTC chip myRTC.updateTime(); // Print the date Serial.print("Date: "); Serial.print(myRTC.dayofmonth); Serial.print("/"); Serial.print(myRTC.month); Serial.print("/"); Serial.print(myRTC.year); Serial.print(" Use code with caution. Copied to clipboard 🛠 Troubleshooting & Errors