UART communication on the ESP32 is a simple and common serial communication standard widely used in embedded systems. UART allows different electronic devices to exchange data efficiently.
UART (Universal Asynchronous Receiver-Transmitter) communication is an asynchronous serial communication protocol. It is used to transmit data between electronic devices such as microcontrollers, sensors, and communication modules.
How it works: UART uses two main wires: one for transmitting data (Tx) and one for receiving data (Rx). Data is transmitted bit by bit, without the need for a clock signal for synchronization. Each data packet includes a start bit, data bits, and one or two stop bits.
Advantages: Simple and easy to implement. Only requires two wires for transmitting and receiving data.
Disadvantages: Low data transmission speed. Not suitable for applications requiring precise synchronization.
When using UART communication, you need to keep the following points in mind:
Baud Rate: Ensure both communicating devices have the same baud rate. Otherwise, data will be corrupted or transmission will fail.
Correct Pin Connection: The Tx pin of one device must be connected to the Rx pin of the other device, and vice versa.
Voltage: Ensure the devices have the same logic voltage level. For example, if one device operates at 3.3V and the other at 5V, you will need to use a voltage level converter.
Common Ground: The devices must share a common ground point to ensure stable communication signals.
Error Checking: Use parity bits if necessary to detect and correct errors during data transmission.
Buffer Management: Check and manage the buffer to avoid buffer overflow, especially when transmitting large amounts of data.
Distance: UART is not suitable for long-distance communication. If long-distance data transmission is required, consider other protocols such as RS-485.
Data transmission and reception connection with a PC Data transmission and reception with other microcontrollers Data transmission and reception connection with modules supporting the UART communication standard
