Added option for multiple RFID Readers #760

To use it, the two files Reader.py and RegisterDevice.py must be replaced with the *py..Multi files.

If you activate multiple RFID readers it´s e.g. possible to read Card and "Figure" RFID parallel.

scripts/Reader.py.Multi

@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+# There are a variety of RFID readers out there, USB and non-USB variants.
+# This might create problems in recognizing the reader you are using.
+# We haven't found the silver bullet yet. If you can contribute to this
+# quest, please comment in the issue thread or create pull requests.
+# ALTERNATIVE SCRIPTS:
+# If you encounter problems with this script Reader.py
+# consider and test one of the alternatives in the same scripts folder.
+# Replace the Reader.py file with one of the following files:
+# * Reader.py.experimental
+#     This alternative Reader.py script was meant to cover not only USB readers but more.
+#     It can be used to replace Reader.py if you have readers such as
+#     MFRC522, RDM6300 or PN532.
+# * Reader.py.kkmoonRFIDreader
+#     KKMOON RFID Reader which appears twice in the devices list as HID 413d:2107
+#     and this required to check "if" the device is a keyboard.
+
+# import string
+# import csv
+import os.path
+import sys
+
+from evdev import InputDevice, ecodes, list_devices
+from select import select
+
+
+def get_devices():
+    return [InputDevice(fn) for fn in list_devices()]
+
+
+class Reader:
+    reader = None
+
+    def __init__(self):
+        self.reader = self
+        devs = list()
+        path = os.path.dirname(os.path.realpath(__file__))
+        self.keys = "X^1234567890XXXXqwertzuiopXXXXasdfghjklXXXXXyxcvbnmXXXXXXXXXXXXXXXXXXXXXXX"
+        if not os.path.isfile(path + '/deviceName.txt'):
+            sys.exit('Please run RegisterDevice.py first')
+        else:
+            with open(path + '/deviceName.txt', 'r') as f:
+                device_keys = f.readlines()
+            devices = get_devices()
+            for device in devices:
+                for dev_key in device_keys:
+                    dev_name, dev_phys = dev_key.rstrip().split(';', 1)
+                    if device.name == dev_name and device.phys == dev_phys:
+                        devs.append(device)
+                        break
+            for dev in devs:
+                try:
+                    dev
+                except:
+                    sys.exit('Could not find the device %s\n. Make sure is connected' % dev.name)
+
+            str_devs = ','.join([str(x) for x in devs])
+            #print("Devs: " + str_devs)
+            self.devices = map(InputDevice, str_devs)
+            self.devices = {dev.fd: dev for dev in devs}
+
+    def readCard(self):
+        stri = ''
+        key = ''
+        while key != 'KEY_ENTER':
+            r, w, x = select(self.devices, [], [])
+            for fd in r:
+                for event in self.devices[fd].read():
+                    if event.type == 1 and event.value == 1:
+                        stri += self.keys[event.code]
+                        # print( keys[ event.code ] )
+                        key = ecodes.KEY[event.code]
+        return stri[:-1]

scripts/RegisterDevice.py.Multi

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+import os.path
+from Reader import get_devices
+
+list_dev_ids = list()
+devices = get_devices()
+
+def addDevice():
+    i = 0
+    print("Choose the reader from list")
+    for dev in devices:
+        print(i, dev.name + str(dev.phys))
+        i += 1
+    dev_id = int(input('Device Number: '))
+    if dev_id not in list_dev_ids:
+        list_dev_ids.append(dev_id)
+
+
+addDevice()
+while True:
+    answer = input('Do you want to add another device: [Y/n]')
+    if not answer or answer[0] != 'Y':
+        break
+    addDevice()
+
+path = os.path.dirname(os.path.realpath(__file__))
+with open(path + '/deviceName.txt', 'w') as f:
+    for sel_dev_id in list_dev_ids:
+        f.write(devices[sel_dev_id].name + ";" + devices[sel_dev_id].phys + '\n')
+    f.close()