XBee Digimesh 2.4
--------------

Customer Release Notes
----------------------

Copyright (C) 2015, Digi International

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### Overview:

These release notes document changes made to the DigiMesh firmware on the XBee S1 and XBee-Pro S1.

### Links:

[Product Information](http://www.digi.com/products/wireless-wired-embedded-solutions/zigbee-rf-modules/zigbee-mesh-module/xbee-digimesh-2-4)  
[Documentation](http://www.digi.com/products/wireless-wired-embedded-solutions/zigbee-rf-modules/zigbee-mesh-module/xbee-digimesh-2-4#docs)  
[Support](http://www.digi.com/support/productdetail?pid=3524)

### Compatible Hardware:

* XBee S1
	* XB24
	* XB24-DM
* XBee-Pro S1
	* XBP24
	* XBP24-DM

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### Release Version:

* 8073 - XBee DigiMesh 2.4
* 8173 - XBee DigiMesh 2.4, RS232 Adapter
* 8373 - XBee DigiMesh 2.4, RS485 Adapter
* 8473 - XBee DigiMesh 2.4, USB Adapter 
* 8673 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8773 - XBee DigiMesh 2.4, Digital I/O Adapter
* 8873 - XBee DigiMesh 2.4, Wall Router

### Release Date: 

* 2015-Mar-30

### New Features:

* None

### Bug Fixes:

* Fixed issue with serial port locking up in API mode 2 when transmitting a steady stream 
  of data without hardware flow control and when moving transmitting and receiving radio 
  in and out of range of each other.

* Fixed issue with synchronous sleep in the presence of unicast and broadcast data in a large 
  network of near 100 nodes. The nodes got out of synch, stopped accepting input on the 
  serial port, and stopped responding to OTA queries.

* Fixed problem with ND command directed to the local module. Response was also received
  erroneoulsy from remote module.

* Fixed timing issues on +++ sequence so that an OK response would occur with enough time 
  before and after the +++ sequence, regardless of when the +++ occurs.

* Corrected defaults in MXI file for RS485 and Wall router builds


### Known Issues / Errata:

* When streaming broadcast messages, occasionally receiving radios will output a packet out its 
  UART multiple times.

* On rare occasions, WR command intermittently fails to get a response. Thereafter communication is lost with
  remote module.
 * Workaround: Only issue WR commands locally.

* Remote ED command fails occasionally because the response can get blocked by the energy scan.
 * Workaround: If the Remote ED command fails, just try again. A response usually occurs.

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### Release Version:

* 8070 - XBee DigiMesh 2.4
* 8170 - XBee DigiMesh 2.4, RS232 Adapter
* 8370 - XBee DigiMesh 2.4, RS485 Adapter
* 8470 - XBee DigiMesh 2.4, USB Adapter 
* 8670 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8770 - XBee DigiMesh 2.4, Digital I/O Adapter
* 8870 - XBee DigiMesh 2.4, Wall Router

### Release Date: 

* 2014-Mar-05

### New Features:

* Added the ATDM command which allows certain DigiMesh features to be disabled.

* Added the ATN? command which allows the maximum timeout for a Network Discovery command to be 
  queried.

### Bug Fixes:

* Fixed bug where corrupt RF data could indefinitely propagate.

* Fixed bug where repeatedly transmitting and power-cycling or resetting a module could cause 
  receiving radios to erroneously drop packets.

* Fixed bug where CTS would erroneously assert too early on power-up (before the radio was ready to 
  receive serial data)

* Fixed bug where the Route Information API frame was being output with extra invalid data at the 
  end of the frame.
	
* Fixed bug where the Energy Detect command (ATED) would occasionally cause the module to reset.

* Fixed bug where the Energy Detect command (ATED) would change the radios operating channel.

### Known Issues / Errata:

* When streaming broadcast messages, occasionally receiving radios will output a packet out its 
  UART multiple times.

* The ATED command does not work in API mode or via remote AT commands.

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### Release Version:

* 8067 - XBee DigiMesh 2.4
* 8167 - XBee DigiMesh 2.4, RS232 Adapter
* 8367 - XBee DigiMesh 2.4, RS485 Adapter
* 8467 - XBee DigiMesh 2.4, USB Adapter 
* 8667 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8767 - XBee DigiMesh 2.4, Digital I/O Adapter
* 8867 - XBee DigiMesh 2.4, Wall Router

### Release Date: 

* 2013-Dec-11

### New Features:

* A software reset can be initiated by asserting a serial break for more than 5 seconds.

* Added code to greatly reduce the probability of packet corruption that can occur when using 
  radios in close proximity to each other.

### Bug Fixes:

* Fixed bug where broadcasting with multiple nodes could cause a third node to lock up. When locked 
  up the module can not receive, but can enter command mode and transmit. After transmitting, the 
  locked up module will recover.

* Fixed bug where the D8 command could not be set to 1.

* Fixed bug where the default for the .mxi file did not match the firmware default.

### Known Issues / Errata:

* None

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### Release Version:

* 8065 - XBee DigiMesh 2.4
* 8165 - XBee DigiMesh 2.4, RS232 Adapter
* 8365 - XBee DigiMesh 2.4, RS485 Adapter
* 8465 - XBee DigiMesh 2.4, USB Adapter 
* 8665 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8765 - XBee DigiMesh 2.4, Digital I/O Adapter
* 8865 - XBee DigiMesh 2.4, Wall Router

### Release Date: 

* 2013-May-08

### New Features:

* Added the ability to enable a clear channel assessment (CCA) feature with the ATCA command.

* Added Test Link functionality for RF link reliability testing.

* Added the ability to enable a Trace Route or NACK on transmitted packets.

* Added a Find Neighbor (ATFN) command.

* Added a command (ATAG) for building and repairing routes to a node and for replacing aggregator 
  nodes.

### Bug Fixes:

* Querying ATOS for large sleep periods was resulting in the wrong value. This has been fixed.

* Certain payloads of encrypted packets were not getting sent correctly. This has been fixed.

* Fixed bug where a remote WR command would immediately apply changes to CH when not desired.

* Fixed bug where changes to the IF parameter would apply a value other than that set.

* Removed the BD8 option from the .mxi file because the error margin at that baud rate is 
  unacceptable.

* Fixed bug where some radios would not receive data after powerup until after the receiving 
  radio had transmitted data.

### Known Issues / Errata:

* None

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### Release Version:

* 8064 - XBee DigiMesh 2.4
* 8164 - XBee DigiMesh 2.4, RS232 Adapter
* 8364 - XBee DigiMesh 2.4, RS485 Adapter
* 8464 - XBee DigiMesh 2.4, USB Adapter 
* 8664 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8764 - XBee DigiMesh 2.4, Digital I/O Adapter
* 8864 - XBee DigiMesh 2.4, Wall Router

### Release Date: 

* 2012-May-02

### New Features:

* Added the ATAG command. (Aggregator Addressing Update)

* Added the trace route command on unicasts.

* Added NACK functionality on unicasts.

* Added the ATFN command. (Find neighbor)

* Added the test link cluster ID.

* Added a number of diagnostic commands.  
  (See the Diagnostic sections available in the X-CTU Modem Configuration tab)

### Bug Fixes:

* Querying ATOS for large sleep periods was resulting in the wrong value.

* Certain payloads of encrypted packets were not getting sent correctly.

* Fixed bug where a remote WR command would immediately apply changes to CH when not desired.

* Fixed bug where changes to the IF parameter would apply a value other than that set.

* Removed the BD8 option because the error margin at that baud rate is unacceptable.

### Known Issues / Errata:

* None

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### Release Version:

* 8062 - XBee DigiMesh 2.4
* 8162 - XBee DigiMesh 2.4, RS232 Adapter
* 8362 - XBee DigiMesh 2.4, RS485 Adapter
* 8462 - XBee DigiMesh 2.4, USB Adapter 
* 8662 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8762 - XBee DigiMesh 2.4, Digital I/O Adapter
* 8862 - XBee DigiMesh 2.4, Wall Router

### Release Date: 

* 2011-Jan-06

### New Features:

* Added asynchronous sleep modes.

* Improved timing for synchronous sleep networks (less wake time is necessary) 

### Bug Fixes:

* Improved accuracy of analog to digital conversions.

* Increased the time that a node will wait to receive a network discovery response to account for 
  the time it takes for the request to propagate.

* Fixed a bug where the pullup resistor would not get properly set on the DIN line.

* Fixed a bug where the default for the D2 command on the RS232 adapter build was wrong. This 
  caused higher than necessary sleep currents.

* Fixed bug where the CB command would not wake up an end device like a real button press would.

* Fixed a bug which would cause reduced receiver sensitivity on some modules.

* Fixed bug where no status was returned for a failed RMT AT CMD Request transmission.

* Fixed a sleeping router bug which would cause a module to continue being a sleep coordinator even 
  after it had received a sync from a senior node. 

### Known Issues / Errata:

* None
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### Release Version:

* 8052 - XBee DigiMesh 2.4
* 8152 - XBee DigiMesh 2.4, RS232 Adapter
* 8352 - XBee DigiMesh 2.4, RS485 Adapter
* 8452 - XBee DigiMesh 2.4, USB Adapter 
* 8652 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8752 - XBee DigiMesh 2.4, Digital I/O Adapter
* 8852 - XBee DigiMesh 2.4, Wall Router

### Release Date: 

* 2010-Jul-22

### New Features:

* Wall Router release (8852) has the light and temp sensor enabled on D1 and D2 inputs. The wall 
  router was designed for the ember modules which use an internal 1.6V VREF the DM24 module uses an 
  external VREF (which is hooked up to 3.3V). This means that the DM24 will have about 1/2 the 
  resolution of the ZB wall router. Furthermore the values returned will be off by a factor of 2.

### Bug Fixes:

* Fixed bug where the assoc. LED would blink even when ATD5 was not equal to 1.

### Known Issues / Errata:

* DigiMesh2.4 f/w has 3dBm worse receiver sensitivity when compared to 802.15.4 f/w. The reason for 
  this is unknown.

* DigiMesh2.4 f/w only receives about 99.95% of packets (PHY level, no retries or retransmissions) 
  when doing a wired test.

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### Release Version:

* 8051 - XBee DigiMesh 2.4
* 8151 - XBee DigiMesh 2.4, RS232 Adapter
* 8351 - XBee DigiMesh 2.4, RS485 Adapter
* 8451 - XBee DigiMesh 2.4, USB Adapter 
* 8651 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8751 - XBee DigiMesh 2.4, Digital I/O Adapter
* 8851 - XBee DigiMesh 2.4, Wall Router

### Release Date: 

* 2010-Jul-15

### New Features:

* Added the wall router build

### Bug Fixes:

* None

### Known Issues / Errata:

* DigiMesh2.4 f/w has 3dBm worse receiver sensitivity when compared to 802.15.4 f/w. The reason for 
  this is unknown.

* DigiMesh2.4 f/w only receives about 99.95% of packets (PHY level, no retries or retransmissions) 
  when doing a wired test.

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### Release Version:

* 8050 - XBee DigiMesh 2.4
* 8150 - XBee DigiMesh 2.4, RS232 Adapter
* 8350 - XBee DigiMesh 2.4, RS485 Adapter
* 8450 - XBee DigiMesh 2.4, USB Adapter 
* 8650 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8750 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 20xx-Xxx-xx

### New Features:

* None

### Bug Fixes:

* Made sleep status API messages more reliable. Now a wake and sleep status message will be output 
  for every wake cycle.

* Fixed bug related to sleep status messages that would cause a module to lock-up or perform in an 
  erratic fashion if the sleep status message code was unable to get a buffer.

### Known Issues / Errata:

* DigiMesh2.4 f/w has 3dBm worse receiver sensitivity when compared to 802.15.4 f/w. The reason for 
  this is unknown.

* DigiMesh2.4 f/w only receives about 99.95% of packets (PHY level, no retries or retransmissions) 
  when doing a wired test.

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### Release Version:

* 804F - XBee DigiMesh 2.4
* 814F - XBee DigiMesh 2.4, RS232 Adapter
* 834F - XBee DigiMesh 2.4, RS485 Adapter
* 844F - XBee DigiMesh 2.4, USB Adapter 
* 864F - XBee DigiMesh 2.4, Analog I/O Adapter
* 874F - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2010-Apr-21

### New Features:

* None

### Bug Fixes:

* Fixed bug where PRO modules were not properly biasing the RF receive balun. This was causing a 10 
  to 15 dBm reduction in RX sensitivity.

### Known Issues / Errata:

* DigiMesh2.4 f/w has 3dBm worse receiver sensitivity when compared to 802.15.4 f/w. The reason for 
  this is unknown.

* DigiMesh2.4 f/w only receives about 99.95% of packets (PHY level, no retries or retransmissions) 
  when doing a wired test.

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### Release Version:

* 804E - XBee DigiMesh 2.4
* 814E - XBee DigiMesh 2.4, RS232 Adapter
* 834E - XBee DigiMesh 2.4, RS485 Adapter
* 844E - XBee DigiMesh 2.4, USB Adapter 
* 864E - XBee DigiMesh 2.4, Analog I/O Adapter
* 874E - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2010-Feb-23

### New Features:

* None

### Bug Fixes:

* Fixed bug where nodes would occasionally lockup. This was caused by incompletely purging a buffer 
  from the MAC.

### Known Issues / Errata:

* None

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### Release Version:

* 804D - XBee DigiMesh 2.4
* 814D - XBee DigiMesh 2.4, RS232 Adapter
* 834D - XBee DigiMesh 2.4, RS485 Adapter
* 844D - XBee DigiMesh 2.4, USB Adapter 
* 864D - XBee DigiMesh 2.4, Analog I/O Adapter
* 874D - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Dec-17

### New Features:

* None

### Bug Fixes:

* Fixed bug where the first analog sample taken in a set would be inaccurate. This was caused 
  because the switch between the VREF and VDDA was not given ample time to settle before a sample 
  was taken.

### Known Issues / Errata:

* None

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### Release Version:

* 804C - XBee DigiMesh 2.4
* 814C - XBee DigiMesh 2.4, RS232 Adapter
* 834C - XBee DigiMesh 2.4, RS485 Adapter
* 844C - XBee DigiMesh 2.4, USB Adapter 
* 864C - XBee DigiMesh 2.4, Analog I/O Adapter
* 874C - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Sep-23

### New Features:

* None

### Bug Fixes:

* Fixed bugs with the default for the ATPR command on the RS232, RS485, AIO, and DIO adapter builds.

### Known Issues / Errata:

* None

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### Release Version:

* 804B - XBee DigiMesh 2.4
* 814B - XBee DigiMesh 2.4, RS232 Adapter
* 834B - XBee DigiMesh 2.4, RS485 Adapter
* 844B - XBee DigiMesh 2.4, USB Adapter 
* 864B - XBee DigiMesh 2.4, Analog I/O Adapter
* 874B - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Aug-31

### New Features:

* Added targets for the RS232, RS485, and USB adapter builds.

* Added .mxi files for the above builds

### Bug Fixes:

* Fixed bug in the wake host code.

* Fixed potential bug discovered on another platform which hasn't ever manifested itself, but 
potentially could have. Every once in a while a network ack will arrive before a MAC ack. If this 
rare event happens multiple times the module can lock up.

* Fixed bug where changing NH,NN,MT, or RN wouldn't always cause ST to be adjusted.

### Known Issues / Errata:

* None

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### Release Version:

* 8049 - XBee DigiMesh 2.4
* 8649 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8749 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Jul-16

### New Features:

* Improved accuracy of some of the sleeping router calculations.

* Added a 16-bit CRC to the sync messages. This CRC uses a different polynomial than the 
  transceiver CRC to increase robustness.

* Added a recovery mode for mains powered nodes in a sleeping router network which are reset. A 
  coordinator will now repeatedly send a sync message when it first powers on. When it hears the 
  sync echoed by a neighbor then it commences its normal cycle. Changes to how the nomination 
  process was implemented allows an existing network to detect and override a newly powered on 
  coordinator.

* Added a sleep option which disables the coordinator from repeatedly sending a sync message during 
  deployment.

* Revised the sync structure (breaking compatibility with previous versions) to better support 
  future compatibility and encryption.

* Sleeping Router polls are now sent in the transmit state rather than in the holdoff state to make 
  use of the randomization provided by the holdoff state.

* Added a new sleep status bit indicating when the node is in deployment mode.

### Bug Fixes:

* Fixed bug where a broadcast sent shortly after a unicast could cause packet tracking to not work 
  on the broadcast resulting in duplicate copies of the same packet output. 

* Fixed bug which caused Node Discoveries in a sleeping router network to be unreliable.

* Fixed bug where transmissions would not work until a XCVR level reception had first taken place.

* Fixed some bugs which caused synch messages to be less reliable.

* Fixed bug which caused the DN or ND+NI responses to be delayed.

* Fixed bug which caused the ND responses to poorly utilize the available response time.

* Fixed bug which caused multiple route discoveries to be initiated even when a route discovery to 
  the same destination is already in progress.

* Fixed bug which caused a reset to occur after a 9second serial break rather than a 5 second one.

* Fixed the entry for the AO command in the .mxi file.

* Fixed a bug where changes to the SP/ST on a non-sleep coordinator would not take effect.

* Added a fix to a transceiver bug mentioned in the XCVR manual errata which caused errors based on 
  the chip ID

### Known Issues / Errata:

* None

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### Release Version:

* 8048 - XBee DigiMesh 2.4
* 8648 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8748 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Jun-03

### New Features:

* To increase the chances of a node receiving a sync, the originator will listen for a sync after 
  sending the first one. If a sync doesn't happen, send another one.

* Always allow all MT + 1 broadcasts, without a timeout. However, unicasts will count an RX 
  detected in progress the same as an RR retry.

* Inserted a random number of delay slots between broadcast retransmissions to improve broadcast 
  reliability.

* Added the NP command to the code and MXI file

### Bug Fixes:

* Improved the distribution of ND responses by randomizing responses based on the value of NT (with 
  resolution to 1-tenth of a second) rather than based on the number of microseconds in the delay. 
  This helps significantly if multiple nodes were reset at the same time prior to the ND command.

* Fixed an issue with turning off the receiver during a receive in progress condition, which was 
  preventing later transmissions from occurring until a new reception was received. This was a 
  particular problem when a receive was in progress when it became time for sleep.

* Fixed NN time slots so that they are based on broadcast time rather than unicast time.

* Reduced loop time for rebroadcasts.

* Recalculated the software overhead time for MAC delay slots based on measured time from the point 
  that it is determined that a frame will be sent until the transmission is started. That duration 
  is measured with a maximum size packet.

* Fixed TX status on a broadcast so that it no longer reports route discoveries

### Known Issues / Errata:

* None

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### Release Version:

* 8047 - XBee DigiMesh 2.4
* 8647 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8747 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Apr-30

### New Features:

* Added a new sleep option bit. When this bit is enabled the election process does NOT take into 
  consideration the node type (SM7 or SM8).

### Bug Fixes:

* Fixed intermittent issue with program loads.

### Known Issues / Errata:

* None

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### Release Version:

* 8046 - XBee DigiMesh 2.4
* 8646 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8746 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Apr-27

### New Features:

* None

### Bug Fixes:

* Fixed bug where changes to ST or SP on an unsynchronized node would not take effect.

### Known Issues / Errata:

* None

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### Release Version:

* 8045 - XBee DigiMesh 2.4
* 8645 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8745 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Apr-09

### New Features:

* Added ability to disable route discoveries through the API. This is done by setting option bit 
  1 (0x02).

* Fixed TX_STATUS to give the correct retry count after a route discovery failure.

### Bug Fixes:

* Fixed issue with occasional watchdog resets with ND commands.

### Known Issues / Errata:

* None

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### Release Version:

* 8044 - XBee DigiMesh 2.4
* 8644 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8744 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Mar-30

### New Features:

* Added the MS command (cycles without synch)
* Added the ATSS (Sleep Status) command.

### Bug Fixes:

* An infinite loop that included a watchdog refresh caused the software to stop operating. The 
  error was caused by a deadlock on a semaphore that could only happen on a PRO module, actively 
  doing analog sampling. The problem occurred when an attempt to get an I/O sample occurred during 
  the time that the ATD was being used for adjusting power levels during a transmission.

* Resolved discrepancy on RSSI reads between PRO and non-PRO modules. Added code to compensate for 
  the perceived extra signal strength caused by the LNA gain.

* Removed RSSI updates on packets before they are fully accepted by the MAC.

* Removed command responses to ND commands after the timeout so that node discoveries now behave 
  like the ZB software.

* The ATOW command was returning the value of the active SP rather than ST.

* Fixed API packets with no payload data. Now these frames are silently discarded rather than being 
  sent OTA.

* Fixed upper and lower limits on GT command to match those limits on 802.15.4 and ZB software.

* Ensure that an API DN command gives exactly one response, whether or not a remote node responds. 
  Previously, a DN command that got a response sent two responses to the UART, and a DN command 
  that got no responses from a remote device would not send any command responses to UART.

* Fixed the entry of strings in command mode so that they are case sensitive. Previously, strings 
  entered in command mode were forced to upper case, while strings entered in API mode were case 
  sensitive. This inconsistency could prevent string matching when switching between API and 
  transparent modes.

* Fixed issue with pending commands failing after a remote IS command with a frame ID of 0 was 
  executed.

* Fixed issue with displaying garbage after an NI string that was entered with 20 characters in 
  transparent command mode.

* The device type field of the ND response was returning the wrong values (the value for router and 
  coordinator were reversed).

* Fixed issue with corruption of ND responses on the first inquiry after reset.

* Fixed an issue with not generating a TX_STATUS message for API messages targeted for the local 
  radio.

### Known Issues / Errata:

* None

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### Release Version:

* 8040 - XBee DigiMesh 2.4
* 8640 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8740 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2009-Feb-26

### New Features:

* Added the AO option to the MXI files.

* Added a new sleep option to allow the user to disable the automatic drift early wakeup.

* Added the ATOW and ATOS commands which allow the user to query the operational sleep and wake 
  times.

* Changed the default of the sleep options to 2 (non-sleep coordinator)

* Removed CCA logic and CA command, which was of marginal value and the removal of which saved code 
  space 

* 2 button commissioning button press: causes the node to nominate itself immediately. 

* IF command: Allows IO samples to be spread out over multiple wake cycles. 

* WH command: Wake host command.

* WH will now cause the module to wake up early. 

* CK command: returns a hash of the CommandConfig.

* Renamed TA command to EA command

* Added CE command

* Limit duration of CT command to ten minutes to avoid timer overflow

* Changed SM4 command to SM8 to distinguish from cyclic sleep in non-DigiMesh products

* Added Encryption support

* Added ATCA and ATRN commands.

### Bug Fixes:

* Fixed an API problem with limiting frame sizes to 62 bytes and 55 bytes for TX_REQ and explicit 
  TX_REQ, respectively. Now all frames <= 73 bytes are transmitted successfully, regardless of 
  whether or not it is an explicit TX_REQ.

* Fixed issue with reporting the wrong version number

* SM7 nodes where drifting too much during sleep, this has been fixed.

* Made it so an ND response will report the value of CE.

* The pullups on the CTS and DOUT lines were not working.

* Fixed a lockup issue caused by not dealing with an out of lock condition during CCA operations.

* Fixed a bug with the API DN command. The command was not returning the 16/64 bit addresses.

* A module with RTS flow control enabled, RTS line deasserted, and characters in its output queue 
  would not go to sleep. This has been fixed. 
  
* Fixed a bug with the DB command in api mode.

* Corrected command length for ND and DN commands

* Fixed certain OTA commands sent by XCTU that precede the parameter with leading zeroes and cause 
  an error response.

* Fixed UART RX operation at 115.2kbps so that receiver overflows no longer occur. Interrupts times 
  were cut way back and operations were added in main loop to do operations that used to occur at 
  interrupt level.

### Known Issues / Errata:

* None

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### Release Version:

* 8030 - XBee DigiMesh 2.4
* 8630 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8730 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2008-Nov-17

### New Features:

* SM7 Sleep Mode (Sleep Support Node)

* Wake via commissioning button.

* Changed Assoc. LED behavior.

* Changed ON_SLEEP behavior.

* Made it so only one unsolicited ND response can be queued at a time for the commissioning button.

* Added the ATSQ command: query the total number of missed synchs.

* Changes to an overriding synch take effect quicker.

### Bug Fixes:

* The calculation of the minimum wake time had a bug in it. This has been fixed.

* Before, a node which had missed an overriding synch could change the network back to the old 
  settings, this has been fixed.

* Doing more than 1 Remote IS command would cause the module to lock up. This has been fixed.

### Known Issues / Errata:

* Errors occur when streaming large amounts of data at 115K baud

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### Release Version:

* 8620 - XBee DigiMesh 2.4, Analog I/O Adapter
* 8720 - XBee DigiMesh 2.4, Digital I/O Adapter

### Release Date: 

* 2008-Sep-02

### New Features:

* The following commands are now feature complete: D0-D9, P0-P3, M0, M1, PR.

* The following commands have been added: IR, IC, IS, CB, LT.

* The commissioning button is now supported.

* The 1wire, AIO, and DIO targets have been created.

### Bug Fixes:

* A remote ATWR wouldn't work, it has been fixed.

### Known Issues / Errata:

* There are problems with packets colliding with the synch message on sleeping router 
  configurations.

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### Release Version:

* 8003 - XBee DigiMesh 2.4

### Release Date: 

* 2008-Aug-22

### New Features:

* None

### Bug Fixes:

* Fixed an issue with transmitting at too low of power immediately after reset due to not waiting 
  long enough to read the ATD signal for power output after enabling it

### Known Issues / Errata:

* None

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### Release Version:

* 8002 - XBee DigiMesh 2.4

### Release Date: 

* 2008-Aug-14

### New Features:

* None

### Bug Fixes:

* An API module would output a TxStatus packet when it received an OTA command. This has been fixed.

* Changed the OTA frame format of a ND response. DD is now the last element in the packet. DD is 
  now output correctly. Parent address field was added.

* Eliminated the closing frame on an API ND.

* ATFR now waits 100mSec before resetting to better interact with XCTU.

### Known Issues / Errata:

* When sending oversize packets across a multi-hop path in both directions, a watchdog reset will 
  occasionally occur.

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### Release Version:

* 8001 - XBee DigiMesh 2.4

### Release Date: 

* 2008-Aug-05

### New Features:

* Initial release.

### Bug Fixes:

* None

### Known Issues / Errata:

* When sending oversize packets across a multi-hop path in both directions, a watchdog reset will 
  occasionally occur.