[FIX] hw_scale: use a larger timeout during initial probe

I'm not sure why the serial timeout is so aggressive, but I assume there
is a reason for it. During probing however, we shouldn't use such an
aggressive timeout because if we miss the device during initial startup
we'll never find it since we only probe devices once.

addons/hw_scale/controllers/main.py

@@ -94,8 +94,8 @@ class Scale(Thread):
                                                    bytesize = serial.SEVENBITS,
                                                    stopbits = serial.STOPBITS_ONE,
                                                    parity   = serial.PARITY_EVEN,
-                                                   timeout  = 0.02,
-                                                   writeTimeout= 0.02)
+                                                   timeout  = 1,
+                                                   writeTimeout = 1)
 
                         connection.write("W")
                         self.probed_device_paths.append(path)
@@ -104,6 +104,8 @@ class Scale(Thread):
                             _logger.debug(path + ' is scale')
                             self.path_to_scale = path
                             self.set_status('connected','Connected to '+device)
+                            connection.timeout = 0.02
+                            connection.writeTimeout = 0.02
                             return connection
                     else:
                         _logger.debug('Already probed: ' + path)