2 files changed, 12 insertions, 5 deletions

diff --git a/glucometer.py b/glucometer.py
index 1131042..e22ff23 100755
--- a/glucometer.py
+++ b/glucometer.py
@@ -53,6 +53,8 @@ def main():
   driver = importlib.import_module('glucometerutils.drivers.' + args.driver)
   device = driver.Device(args.device)
 
+  device.connect()
+
   try:
     if args.action == 'info':
       print(device.get_information_string())
@@ -95,5 +97,7 @@ def main():
     print('Error while executing \'%s\': %s' % (args.action, str(err)))
     return 1
 
+  device.disconnect()
+
 if __name__ == "__main__":
     main()
diff --git a/glucometerutils/drivers/otultra2.py b/glucometerutils/drivers/otultra2.py
index dc03c97..3af78fc 100644
--- a/glucometerutils/drivers/otultra2.py
+++ b/glucometerutils/drivers/otultra2.py
@@ -110,16 +110,20 @@ class Device(object):
       parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE,
       timeout=1, xonxoff=False, rtscts=False, dsrdtr=False, writeTimeout=None)
 
+  def connect(self):
+    self.serial_.write(b'\x11\r')
+    self.serial_.flush()
+
+  def disconnect(self):
+    return
+
   def _send_command(self, cmd):
     """Send command interface.
 
     Args:
       cmd: command and parameters to send (without newline)
-
-    This function exists to wrap the need to send the 0x11 0x0d prefix with
-    each command that wakes this model up.
     """
-    cmdstring = bytes('\x11\r' + cmd + '\r', 'ascii')
+    cmdstring = bytes(cmd + '\r', 'ascii')
     self.serial_.write(cmdstring)
     self.serial_.flush()
 
@@ -155,7 +159,6 @@ class Device(object):
               self.get_glucose_unit()))
 
   def get_version(self):
-
     """Returns an identifier of the firmware version of the glucometer.
 
     Returns: