It is very easy to simulate serial UART communication but it should be remembered that it does not have any dedicated hardware and it will utilize the resources of already given Arduino Board like memory and execution time. In this case, a specially implemented software library is used to simulate UART communication behavior on other digital input output pins of Arduino. But, maximum Ardiuno compatible boards do not have multiple serial ports. This USB connection transfers data to the Arduino IDE serial monitor using Rx and Tx pins.Īlthough Arduino Mega has up to four serial communication ports. ![]() The other important reason to use the uart software library is that the UART port of Arduino is used by the onboard USB connection.
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