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Firmware Version: 2021
Stack version:    2124AD07 
Release Date: Sep 27, 2013


Major new features since 2004 release:
1. Device Cloud support.  (See product manual for a full description.)

2. Soft AP support in two presentation modes:
   a. Provisioning mode presents a web page to a Wi-Fi STA device for initial
      configuration.  This mode is only available when the SSID is not configured.
      This mode can be forced by pressing the commissioning button four times
      in succession.
   b. Point to point mode where the module does normal TCP transmissions and
      receptions with a STA device.  This provides a nice alternative to Ad-hoc
      mode.  This mode is enabled by the CE 1 command.

3. Added support for binary IP addresses in AT commands in API mode.

4. Self-addresssed MAC addresses may be used in API frames.  For frames destined
   to another module, IP addresses must continue to be used.

5. Ability to toggle output pins without changing configuration using IO command.
   This command can be used to toggle output lines on a remote module from the
   Device Cloud.

6. Added support for RSSI PWM.

7. WPS support is available by pressing commissioning button twice.

8. With P2 set to 6, DIO12 now indicates if a TCP connection is established
   while operating in transparent mode.

9. The DI command is now used to indicate the status of the connection to the
   Device Cloud.


Major bug fixes since 2004 release:
1. TCP transmissions and receptions have been stabilized to support continuous
   traffic over a long period of time without data loss.

2. TCP socket closures work properly whether done with a FIN/ACK procedure or
   by receiving a socket reset command.

3. AdHoc mode successfully sends and receives data between two modules.


Known issues:
1. Single byte TCP transmissions are often delayed by about 6 or 7 seconds.
   This is seen when using a keyboard in the terminal window of X-CTU to send
   data between two XBee modules if the destination module is also connected
   to Device Cloud.
2. The IE 8 browser does not successfully apply changes in soft AP mode.
   IE 10, Firefox, Chrome, and other browsers work fine in Soft AP mode.