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Classification and Application of Serial Port Baud Rate

Serial port baud rate refers to the rate at which data is transmitted in a serial communication system. In UART serial communication, data is transmitted in the form of bits, and baud rate refers to the number of bits transmitted per second. In serial communication, baud rate is a very important parameter because it can directly affect the quality and efficiency of communication. This article will introduce the concept, classification, selection and application of serial port baud rate.

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Classification of serial port baud rate

Serial port baud rate includes the following:

  • 9600 baud rate: This is one of the most commonly used baud rates in serial communication, and 9600 bits can be transmitted per second.

  • 19200 baud rate: This is a higher baud rate than 9600 baud rate, and 19200 bits can be transmitted per second.

  • 38400 baud rate: This is a higher baud rate than 19200 baud rate, and 38400 bits can be transmitted per second.

  • 57600 baud rate: This is a higher baud rate than 38400 baud rate, which can transmit 57600 bits per second.

  • 115200 baud rate: This is the highest serial port baud rate, which can transmit 115200 bits per second.


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Selection of serial port baud rate

When selecting the serial port baud rate, you need to choose according to the actual application. Generally, the choice of baud rate depends on the communication distance, data volume and communication quality requirements. Generally speaking, the higher the baud rate, the faster the communication speed, but it may also cause transmission data loss or a shorter transmission distance. Therefore, when selecting the serial port baud rate, you need to consider a variety of factors.

Application of serial port baud rate

Serial port baud rate has a wide range of IoT applications in many application scenarios, such as:

  • Industrial control: In the field of industrial control, serial port communication is widely used in the communication of various sensors, actuators and controllers. Different industrial equipment may require different serial port baud rates, so you need to choose according to the actual situation.

  • Data acquisition: In terms of data acquisition, serial communication can be used to collect data from various sensors and devices. For example, devices such as weather stations and environmental monitoring stations usually use serial communication for data acquisition.

  • Remote monitoring: In terms of remote monitoring, serial communication can be used to connect various devices, such as PLC (programmable logic controller), smart meters, screens, etc.

  • PC serial communication: PC can communicate with external devices through serial ports, such as connecting modems, printers, etc.


In short, serial port baud rate is one of the most important parameters in serial communication, and it needs to be selected according to the actual application situation. Different application scenarios may require different serial port baud rates, so it needs to be selected according to the specific situation. At the same time, when using serial communication, you also need to pay attention to issues such as data transmission quality and distance. You can choose different serial port baud rate devices such as serial port servers, ECAN smart protocol conversion devices, 4G DTU and other communication devices to ensure the stability and reliability of communication.