Support for the RDM6300 serial RFID module

Support for the RDM6300 serial RFID module

1.) Connect the RDM6300 module
------------------------------
Connect the RDM6300 module to the serial GPIO pins 14 and 15.

2.) Enable GPIO serial port
---------------------------
Edit the /boot/config.txt (sudo nano /boot/config.txt) and add the following line:
    enable_uart=1

3.) Install dependecies
-----------------------
Be aware not to install the "serial" module, install "pyserial" instead and the RPi.GPIO module:
    pip install pyserial RPi.GPIO

4.) Replace the default Reader.py
---------------------------------
Replace the Reader.py file with the Reader_RDM6300.py:
mv Reader.py Reader_default.py; mv Reader_RDM6300.py Reader.py

scripts/Reader_RDM6300.py

@@ -0,0 +1,44 @@
+"""
+Support for the RDM6300 serial RFID module
+
+1.) Connect the RDM6300 module
+------------------------------
+Connect the RDM6300 module to the serial GPIO pins 14 and 15.
+
+2.) Enable GPIO serial port
+---------------------------
+Edit the /boot/config.txt (sudo nano /boot/config.txt) and add the following line:
+    enable_uart=1
+
+3.) Install dependecies
+-----------------------
+Be aware not to install the "serial" module, install "pyserial" instead and the RPi.GPIO module:
+    pip install pyserial RPi.GPIO
+
+4.) Replace the default Reader.py
+---------------------------------
+Replace the Reader.py file with the Reader_RDM6300.py:
+mv Reader.py Reader_default.py; mv Reader_RDM6300.py Reader.py
+"""
+
+
+import RPi.GPIO as GPIO
+import serial
+import string
+
+
+class Reader:
+    def __init__(self):
+        GPIO.setmode(GPIO.BCM)
+        self.rfid_serial = serial.Serial('/dev/ttyS0', 9600)
+
+    def readCard(self):
+        while True:
+            card_id = ''
+            read_byte = self.rfid_serial.read()
+            if read_byte == b'\x02':
+                while read_byte != b'\x03':
+                    read_byte = self.rfid_serial.read()
+                    card_id += read_byte.decode('utf-8')
+                card_id = ''.join(x for x in card_id if x in string.printable)
+                return card_id