Python Serial Communication (Pyserial) Tutorial

Python Serial Communication ( pyserial ): Initialize serial device

Serial takes these two parameters: serial device and baudrate ser = serial.Serial(‘/dev/ttyUSB0’, 9600)

Read from serial port

Initialize serial device

import serial

Serial takes two parameters: serial device and baudrate ser = serial.Serial(‘/dev/ttyUSB0’, 9600)

to read single byte from serial device

data = ser.read()

to read given number of bytes from the serial device

data = ser.read(size=5)

to read one line from serial device.

data = ser.readline()

to read the data from serial device while something is being written over it.

for python2.7

data = ser.read(ser.inWaiting())

for python3

ser.read(ser.inWaiting)

ython Serial Communication (pyserial): Check what serial ports are available on your machine

To get a list of available serial ports use

python -m serial.tools.list_ports

at a command prompt or

from serial.tools import list_ports

list_ports.comports() # Outputs list of available serial ports