The RTC DS 3231 (which works on the I2C protocol) is used to wake up Arduino UNO board from sleep using an interrupt. When the alarm occurs an interrupt is being triggered on the INT pin of the RTC ...

You want to determine precise times when the Arduino will run special code segments in a sketch, without using the timers and counters in the Arduino hardware. You have some skill and experience ...

For waking up Arduino from sleep mode, a reset button can be pressed, or an Arduino interrupt can be programmed. During sleep modes, the power consumption of Arduino boards is reduced to a few ...

Prior to learning about pin change interrupts first let's discuss the concept of an interrupt. It is one of the most fundamental principles of embedded systems but on the other hand, it seems to be a ...