Example script for sending and receiving data via an arduino

pySerialArduinoExample.py

#/usr/bin/python

import serial
import time

# try connecting to serial port
try:
  print 'MSG: Connecting to arduino'
  arduino = serial.Serial('/dev/tty.usbserial-A600agDn', 9600)
  
  # wait for the arduino to reset
  time.sleep(2)
  
except:
  print 'ERR: Unable to connect to arduino'

try:
  print 'MSG: Sending data to arduino'
  
  # write a single char to the arduino
  arduino.write('3')
  
  print 'MSG: Sent data to arduino'
  
except:
  print 'ERR: Unable to send data' 
  arduino.close()
  

try:
  # wait for arduino to reply
  time.sleep(1)
  
  print 'MSG: Attempting to read from arduino'
  
  # read one byte from the arduino
  print arduino.read(1)
except:
  print 'ERR: Unable to read data properly'


arduino.close()