![]() ![]() Communication with the RTC is done through an I2C interface with a fixed default address of 0圆8.Īside from the RTC chip, this particular module also has a 24C32 EEPROM chip. There are also two programmable time-of-day alarms and also a programmable square-wave output. The clock can operate in either 24H or 12H (with AM/PM) formats. It also automatically adjusts for months with less than 31 days and also for leap years. The RTC keeps track of seconds, minutes, hours, day, date, month, and year data. The chip automatically switches between main and backup power sources when necessary. To keep track of time even if the main power source is removed, the DS3231 has a backup battery mounted at the back of the module. It is very accurate because it uses an integrated temperature-compensated crystal oscillator (TCXO) along with a crystal. The DS3231 IC is a very affordable and extremely accurate RTC with an I2C interface. The DS3231 RTC module is a real-time clock module using the DS3231 IC. If you want to learn how to communicate with an internet time server to get the current time and date, please read How to Keep Track of the Date and Time on an Arduino. The clock source of a time server can be another time server, an atomic clock, or a radio clock.Īn RTC is a very popular and accurate source of time and date in an embedded system like an Arduino because it has low power consumption. Time Server– A Time Server is a computer on a network that reads the time from some reference clock and distributes it to the network.Global Positioning Device (GPS) – A GPS device communicates with satellites to determine its location anywhere in the world.It uses a back-up battery to maintain the time in the event that the main power source is removed. Real-Time Clock (RTC) – A Real-Time Clock, or RTC for short, is an integrated circuit that keeps track of time.We can get it from a Real-Time Clock (RTC), a GPS device, or a time server. There are several ways to get the current date and time. How to Get the Current Date and Time on an Arduino Depending on the project, having a way to get the current date and time is very useful. Arduino-based clocks use the current time as a timer for reminders or to execute a scheduled command via the Arduino’s I/O pins. Another example is for an Arduino digital clock or calendar. For example, an Arduino Weather Station needs timestamps in recording weather data. One use for it is for recording/log purposes. Keeping track of the current date/time for an Arduino has many purposes. ![]()
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