This chapter describes the serial communication supports device in
microcontroller. Serial communication is the process of sending data bit wise on a
communication channel, with a data rate in bits per second which is known as baud
rate. Examples of baud rate for communicating with the computer may include 300,
600, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, or 115200. A
universal asynchronous receiver/transmitter (UART) is responsible for implementing
serial communication. UART acts as an intermediate between serial and parallel
interface. All Arduino boards have at least one serial port (also known as a UART or
USART. The RF modem and GSM modem are two modules, works on serial
communication.
Keywords: 2.4GHz, Arduino, GSM.
