Samsys RFID

gistfile1.txt

# Work with the Samsys 2.8 RFID reader over serial, strip out dupe output
# Adapted from a threaded serial "chat" snippet
# http://stackoverflow.com/questions/10465952/python-chat-program-for-serial-port-connection-rs-232
#
# Default port and baudrate are /dev/serial/by-id/usb-Keyspan__a_division_of_InnoSys_Inc._Keyspan_USA-19H-if00-port0 and 57600
#
# Refer to CHUMP command reference for commands, include ! at end of your command
# http://www.sirit.com/Tech_Support_Downloads/CHUMP_Prot_Ref_Gd_v7.0[1].pdf
# in the future you can enable script to generate proper cmd checksum
#
# this is what the serial data looks like: (it repeats constantly while the tag is nearby)
# {Rd,d:3005FB63AC1F3841EC880467,t:EPC1G2,e:28;14 
#
# Quiet a given tag from the output:
#}Ht,d:[ID]!
#
#Read a given memory block for any tag in field
#
#}Ra,a:[block],s:[offset](,l:[length])!
# More details: https://noisebridge.net/wiki/Rfid
#
from serial import * 
from threading import Thread 

class Receiver(Thread): 
    def __init__(self, serialPort): 
        Thread.__init__(self) 
        self.serialPort = serialPort 
    def run(self): 
        text = "" 
        oldText=""
        while (text != "exit\n"): 
            text = serialPort.readline() 
            if(oldText != text):
            	print ("reader: " + text) 
            	oldText = text;
        self.serialPort.close() 

class Sender(Thread): 
    def __init__(self, serialPort): 
        Thread.__init__(self) 
        self.serialPort = serialPort 
    def run(self): 
        text = "" 
        while(text != "exit\n"): 
            text = raw_input("Send your command>>") 
            # command + ; + first two chars of checksum + break
            #sendMe = text + checksum(text) +"\r\n" 
            sendMe = text+"\n"
            self.serialPort.write(sendMe) 
        self.serialPort.close() 
	# generate proper CHUMP command checksum, you need to add a ; after your cmd
	#def checksum(str):
	#	chk=0;
	#	for c in str:
	#		tmp=ord(c)
	#		chk=chk+tmp
	#	chk = hex(chk)	
	#	return chk[-2:]
		
serialPort = Serial("/dev/serial/by-id/usb-Keyspan__a_division_of_InnoSys_Inc._Keyspan_USA-19H-if00-port0 ",57600)

send = Sender(serialPort) 
receive = Receiver(serialPort) 
send.start() 
receive.start()