python serial port

Question

I want to communicate with my serial port in python. I installed pyserial and uspp for linux:

import serial
ser = serial.Serial('/dev/pts/1', 19200, timeout=1)
print ser.portstr #check which port was really used
ser.write("hello") #write a string
ser.close() #

It gives the following error:

Traceback (most recent call last):
 File "poi.py", line 5, in <module>
 ser.open() 
 File "/usr/local/lib/python2.6/dist-packages/pyserial-2.5-py2.6.egg/serial/serialposix.py", line 276, in open
 raise SerialException("could not open port %s: %s" % (self._port, msg))
serial.serialutil.SerialException: could not open port /dev/tyUSB1: [Errno 2] No such file or directory: '/dev/tyUSB1'

• Brad Larson: possible duplicate of help.....serial port programming

Answer 1

if you are working with linux, generally, serial ports are named /dev/tty* ; just replace the * with s and the number of the port like /dev/ttyS1. I work with a arduino that communicates via usb-serial, and it's /dev/ttyUSB0.