UART works by converting data into packets for sending or rebuilding data from packets received.

We can only connect two UART devices together. In order to get good results we need also to connect GNDs Figure 1: Basic UART Connection Diagram One wire is for transmitting data (called the TX pin) and the other is for receiving data (called the RX pin). Figure 1 shows a basic UART connection diagram. Here, we present connecting two UART devices together is simple and straightforward. It is a hardware device (or circuit) used for serial communication between two devices. UART stands for Universal Asynchronous Receiver/Transmitter. We will also write a simple sketch to explore serial interface for Arduino modules and present three applications with their code.

1) Introduction: In this work, we show what is UART communication and how it works. The protocol of communication is well explained and we finally, present three examples of using serial communication UART with Bluetooth, GPS sensor and for communication with another processor raspberry Pi. In this preprint we give an introduction on UARTs basically in Arduino modules. It allows user to communicate in serial mode or connect a device in wireless mode. UART is one of the most useful serial interface, it is presented in microcontrollers and in single board computers.

Uart serial communication pdf