More example cleanup.

examples/serialport.py

@@ -2,17 +2,21 @@ import time
 from pyad2 import AD2
 from pyad2.devices import SerialDevice
 
+# Configuration values
+SERIAL_DEVICE = '/dev/ttyUSB0'
+BAUDRATE = 115200
+
 def main():
     """
     Example application that opens a serial device and prints messages to the terminal.
     """
     try:
         # Retrieve the specified serial device.
-        device = AD2(SerialDevice(interface='/dev/ttyUSB0'))
+        device = AD2(SerialDevice(interface=SERIAL_DEVICE))
 
         # Set up an event handler and open the device
         device.on_message += handle_message
-        device.open(baudrate=115200)            # Override the default SerialDevice baudrate.
+        device.open(baudrate=BAUDRATE)            # Override the default SerialDevice baudrate.
         device.get_config()
 
         # Wait for events.

examples/socket_example.py

@@ -2,14 +2,18 @@ import time
 from pyad2 import AD2
 from pyad2.devices import SocketDevice
 
+# Configuration values
+HOSTNAME = 'localhost'
+PORT = 10000
+
 def main():
     """
     Example application that opens a device that has been exposed to the network
-    with ser2sock or similar serial->ip software.
+    with ser2sock or similar serial-to-IP software.
     """
     try:
         # Retrieve an AD2 device that has been exposed with ser2sock on localhost:10000.
-        device = AD2(SocketDevice(interface=('localhost', 10000)))
+        device = AD2(SocketDevice(interface=(HOSTNAME, PORT)))
 
         # Set up an event handler and open the device
         device.on_message += handle_message

examples/ssl_socket.py

@@ -2,6 +2,13 @@ import time
 from pyad2 import AD2
 from pyad2.devices import SocketDevice
 
+# Configuration values
+HOSTNAME = 'localhost'
+PORT = 10000
+SSL_KEY = 'cert.key'
+SSL_CERT = 'cert.pem'
+SSL_CA = 'ca.pem'
+
 def main():
     """
     Example application that opens a device that has been exposed to the network
@@ -16,9 +23,9 @@ def main():
         # The key/cert attributes can either be a filesystem path or an X509/PKey
         # object from pyopenssl.
         ssl_device.ssl = True
-        ssl_device.ssl_key = 'cert.key'         # Client private key
-        ssl_device.ssl_certificate = 'cert.pem' # Client certificate
-        ssl_device.ssl_ca = 'ca.pem'            # CA certificate
+        ssl_device.ssl_ca = SSL_CA              # CA certificate
+        ssl_device.ssl_key = SSL_KEY            # Client private key
+        ssl_device.ssl_certificate = SSL_CERT   # Client certificate
 
         device = AD2(ssl_device)
 

examples/virtual_zone_expander.py

@@ -2,6 +2,10 @@ import time
 from pyad2 import AD2
 from pyad2.devices import USBDevice
 
+# Configuration values
+TARGET_ZONE = 41
+WAIT_TIME = 10
+
 def main():
     """
     Example application that periodically faults a virtual zone and then
@@ -36,12 +40,11 @@ def main():
         # Wait for events.
         last_update = time.time()
         while True:
-            if time.time() - last_update > 10:
-                # Fault zone 41 every 10 seconds.
-                device.fault_zone(41)
-
+            if time.time() - last_update > WAIT_TIME:
                 last_update = time.time()
 
+                device.fault_zone(TARGET_ZONE)
+
             time.sleep(1)
 
     except Exception, ex: