Download the library source files (ZIP format) from a trusted repository like GitHub. Open your Arduino IDE.
virtuabotixRTC myRTC(2, 3, 4); File dataFile; const int chipSelect = 10; // SD Card CS pin
| DS1302 Module Pin | Connect to Arduino Pin | | :--- | :--- | | | 5V (or 3.3V, but 5V is typical) | | GND | GND | | CLK (Clock) | Digital Pin 4 | | DAT (Data) | Digital Pin 3 | | RST (Reset/Chip Select) | Digital Pin 2 |
The VirtuabotixRTC.h library is a lightweight Arduino library for interfacing with common real-time clock (RTC) modules based on the DS1307 and similar I²C RTC chips. It provides simple functions to set and read the current time and date, and to convert between raw RTC register values and human-readable formats suitable for embedded projects. virtuabotixrtc.h arduino library
delay(1000); // Update every second
: The library does not contain automatic leap year calculation for day-of-week tracking. It relies on the user to correctly maintain day-of-week or update it externally. For applications needing self-correcting calendars, this is a limitation.
Connecting a standard DS1302 module to your Arduino is straightforward. The module typically has 5 pins: VCC , GND , CLK , DAT , and RST . Download the library source files (ZIP format) from
To use the library, you must first install it (often manually via a ZIP from GitHub ) and then include it in your sketch. Problem with code for Arduino using an RTC - Programming
// Create the RTC object virtuabotixRTC myRTC(RTC_RST, RTC_DAT, RTC_CLK);
Note: You should upload the code once to set the time, then comment out the setDS1302Time line and upload the code again to prevent the Arduino from resetting the time to the compiled moment every time it resets. It provides simple functions to set and read
By following the wiring diagrams, mastering updateTime() and setDS1302Time() , and applying the project examples above, you can add precise timekeeping to anything from a simple alarm clock to a complex agricultural data logger.
The virtuabotixrtc.h library is a third-party Arduino library designed to interface with low-cost, serial Real-Time Clock (RTC) modules, most notably the chip. Unlike the more common I2C-based DS1307 or DS3231 RTCs, the DS1302 uses a 3-wire serial interface. This library simplifies communication, time setting, and reading of these specific RTC modules, making them accessible for Arduino projects where cost is a primary constraint and precise timekeeping is moderately important.
void setup() Serial.begin(9600);
