AT commands
Networking and security commands
C8 (802.15.4 Compatibility)
This command applies to the XBee/XBee-PRO S2C 802.15.4 RF Module.
Sets or displays the operational compatibility with the Legacy 802.15.4 module (S1 hardware).
Parameter range
0 - 3
Bit field:
Bit
Meaning
Setting
Description
1
Transmissions are optimized as follows:
0
TX
0
compatibility
1. Maximum transmission size is affected by multiple factors
(MM, MY, DH, DL, and EE). See Maximum payload rules. In
the best case, with no app header, short source and
destination addresses, and no encryption, the maximum
transmission size is 116 bytes.
2. Multiple messages can be present simultaneously on the
active queue, providing they are all destined for different
addresses. This improves performance.
Transmissions operate like the Legacy 802.15.4 module, which
means the following:
1
1. Maximum transmission size is 95 bytes for encrypted
packets and 100 bytes for un-encrypted packets. These
maximum transmission sizes are not adjusted upward for
short addresses or for lack of an APP header.
2. Only one transmission message can be active at a time,
even if other messages in the queue would go to a
different destination address.
1
This bit does not normally need to be set. However, when the XBee/XBee-PRO S2C 802.15.4 RF Module is
streaming broadcasts in transparent mode to a Legacy 802.15.4 module (S1 hardware), and RR > 0, then this bit
does need to be set to avoid a watchdog reset on the Legacy 802.15.4 module.
XBee/XBee-PRO S2C 802.15.4 RF Module User Guide
68
ETC [ ETC ]
