To get it started with Arduino Uno board and blink the built-in LED, load the example code by selecting Files>Examples>Basics>Blink. Arduino Uno is programmed using Arduino programming language based on Wiring. Now open the arduino IDE and choose the correct board by selecting Tools>Boards>Arduino/Genuino Uno, and choose the correct Port by selecting Tools>Port. Once arduino IDE is installed on the computer, connect the board with computer using USB cable. When ATmega328 chip is used in place of Arduino Uno, or vice versa, the image below shows the pin mapping between the two.Īrduino IDE (Integrated Development Environment) is required to program the Arduino Uno board. The Arduino software includes a Wire library to simplify use of the I2C bus. The ATmega328P also supports I2C (TWI) and SPI communication. A SoftwareSerial library allows for serial communication on any of the Uno's digital pins. There are two RX and TX LEDs on the arduino board which will flash when data is being transmitted via the USB-to-serial chip and USB connection to the computer (not for serial communication on pins 0 and 1). The Arduino software includes a serial monitor which allows simple textual data to be sent to and from the Arduino board. The ATmega16U2 firmware uses the standard USB COM drivers, and no external driver is needed. An ATmega16U2 on the board channels this serial communication over USB and appears as a virtual com port to software on the computer. The ATmega328P microcontroller provides UART TTL (5V) serial communication which can be done using digital pin 0 (Rx) and digital pin 1 (Tx).
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