python serial library example

Veröffentlicht am: 22 Februar 2024
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title: getting started with python serial communication using the serial library
serial communication is a common method for exchanging data between devices, especially in embedded systems and iot applications. python provides the serial library, which allows you to easily communicate with serial devices. in this tutorial, we'll explore the basics of the serial library and provide a simple example of serial communication.
before you begin, ensure you have python installed on your system. you can download python from python.org.
the serial library is not included in the python standard library, so you need to install it separately. open your terminal or command prompt and run:
this will install the pyserial library, which is commonly referred to as serial.
now, let's create a simple python script to demonstrate basic serial communication. for this example, we'll use two virtual serial ports using software like com0com or virtual serial ports emulator.
importing the serial library: import the serial module at the beginning of your script.
setting up serial connection: specify the com port and baud rate according to your setup. create a serial connection using serial.serial().
serial communication loop: inside a loop, write data to the serial port using ser.write() and read data from the serial port using ser.readline().
handling keyboardinterrupt: the try...except...finally block ensures that the serial connection is properly closed even if the user interrupts the program with a keyboard interrupt (ctrl+c).
closing the serial connection: in the finally block, close the serial connection using ser.close().

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