The latter is handy for doing arithmetic with dates.
as distinct values for year, month, day, hour, minute and second, or. A variable of the DateTime type can represent a specific date and time in two different ways: 
DateTime enables a versatile object for managing date and time data. rtc.adjust(DateTime(2020, 1, 21, 19, 47, 36)) īT.The Library incorporates two other classes to assist with managing date and time data: This line sets the RTC with an explicit date & time, for example to set While (!Serial) // for Leonardo/Micro/Zero The end date of each month adjusts automatically, including those months having less than 31 days.Ĭhar daysOfTheWeek = The clock gives seconds, minutes, hours, day, month, and year qualified data. It is a low power clock with 56-byte of battery backup SRAM. The DS1307 is a real time clock (RTC) that has eight pins and uses an I2C interface. 
Arduino Bluetooth Text-to-Speech Application. We will interface the Arduino and RTC to send the data to a smartphone using a Bluetooth module which allows data to be spoken out via a text-to-speech application. Therefore, in order to synchronize the Arduinoâs internal clock with the real clock even when it has no power, we use the RTC. It loses track of the time and the clock resets to zero and starts counting from zero upon power-up. 
In the case of an Arduino, the internal clock resets when it is restarted or unplugged. It has a built-in circuit for sensing power which keeps track of power failures and automatically switches to the backup supply. The RTC keeps track of the time even without power. We will deploy a real time clock (RTC) IC instead of using an ordinary 555 timer IC.
It can be a nice tutorial for designing around IoT and sensor applications for the visually impaired where data can be monitored via audio. The idea is to create a way for sensor data from the Arduino to be spoken out via a smartphone, and I am using an RTC module as an example. In this tutorial, we will build a real-time Arduino-based clock that will speak out the time and date when a button is pressed.
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