Myujth

I am trying to interface a Raspberry Pi with a USB RFID card reader using a Python script. For the record, my code is as follows:

import serial, time, sys
import sqlite3 as lite

reader = "/dev/ttyUSB0"
ser = serial.Serial(reader, timeout=1)
print("Connected to RFID reader on:", reader)

try:
 while True:
 thetime = time.strftime("%Y-%m-%d %a %H:%M:%S", time.localtime())
 ser.flushInput() # flush any extra data from the serial port
 rfid_data = ser.readline().strip()

 if len(rfid_data) > 0:
 rfid_data = rfid_data[1:11]
 print("Card scanned", rfid_data)


 else:
 print("Card not found")

except:
 print("Unexpected error")

finally:
 ser.close()

I'm actually receiving more than one error at the moment. Instead of trying my best to explain it in my own words, I am sure that the following snippet would be more useful to most of you.

Traceback (most recent call last):
 File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 275, in open
 self.fd = os.open(self.portstr, os.O_RDWR|os.O_NOCTTY|os.O_NONBLOCK)
FileNotFoundError: [Errno 2] No such file or directory: '/dev/ttyUSB0'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
 File "/home/pi/Desktop/Alex Panagis/rfidtestfinal.py", line 5, in <module>
 ser = serial.Serial(reader, timeout=1)
 File "/usr/lib/python3/dist-packages/serial/serialutil.py", line 261, in __init__
 self.open()
 File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 278, in open
 raise SerialException("could not open port %s: %s" % (self._port, msg))
serial.serialutil.SerialException: could not open port /dev/ttyUSB0: [Errno 2] No such file or directory: '/dev/ttyUSB0'

Any help in resolving this issue is greatly appreciated :)