Also, SoftwareSerial will be used when we want to connect via serial communication on some other digital pins of Arduino. In that case, we will use Software Serial Library. Now you might be thinking what if we need more serial ports in our project.

This is how we can control devices connected to Arduino using a serial interface. When we enter ‘0’ and hit Send button LED will turn OFF. We will see on board orange LED will turn ON. Now just enter ‘1’ and press Send button. We are ready to control LED connected PIN 13 of Arduino. Now just verify and upload the sketch to Arduino and open up Serial Monitor. Serial.println('Type 1: LED ON, 0: LED OFF ') // Ready to receive commands This way we can perform transmit and receive data using Arduino board. This program receives data from PC and then send it back to PC. Open Serial Monitor of Arduino IDE Serial Monitor of Arduino Printing StringĮxample Program 2: In this example, we will transmit as well as receive data using Arduino. We will observe that LED connected to TX Pin on Arduino will light up. As we been transmitting string from Arduino to PC. Once we have done connection we are ready to upload the sketch to Arduino and open serial monitor window to display data sent from Arduino. Hardware Setup: We only need to connect Arduino Uno to PC over standard USB Cable. We will see this string will be printing on Serial Monitor Window of Arduino IDE. We can use serial communication to debug the code and track errors to interface those devices.Įxample Program 1: In this example, we will send a string from Arduino to PC. When comes to interfacing more complicated devices such as LCD, RTC, EEPROM etc.

The serial communication enables us to control electronic devices connected to Arduino board from PC. The same way we can send data/command from Serial Monitor to Arduino. The Arduino IDE has built-in Serial Monitor window, which displays the data sent from Arduino to PC. This comes handy when we want to send the sensor data from microcontroller to PC. The Arduino can transmit and receive data to the PC over USB Cable. UART as a serial protocol is most useful and famous protocol. Arduino has built-in support for UART which enable serial communication. In this tutorial, we will explore the use of Serial Communication in Arduino Uno.

Arduino hardware serial example