AT commands 802.15.4 Addressing commands
Digi XBee3® 802.15.4 RF Module User Guide
90
DL command
Set or display the lower 32 bits of the 64-bit destination address. When you combine DH with DL, it
defines the destination address that the device uses for transmissions in Transparent mode. This
destination address is also used for outgoing I/O samples in both Transparent and API modes.
0x000000000000FFFF is the broadcast address (DH = 0, DL = 0xFFFF).
Parameter range
0 - 0xFFFFFFFF
Default
0
RR command
Set or reads the number of application-layer retries the device executes. Application-layer retries are
only enabled if a Digi header is present via the MM command.
Every transmitted unicast transmission utilizes up to three MAC-Layer retries (if enabled via the MM
command). If RR > 0, a failed unicast transmission will be attempted RR times (each application-layer
retry will exhaust the three MAC-layer retries).
When transmitting a broadcast message, if RR = 0, only one packet is broadcast. If RR is > 0, then RR +
2 packets are sent on each broadcast. No acknowledgments are returned on a broadcast.
The RR value does not need to be set on all devices for retries to work. If retries are enabled, the
transmitting device sets a bit in the Digi RF Packet header that requests the receiving device to send
an ACK. If the transmitting device does not receive an ACK within 200 ms, it re-sends the packet
within a random period up to 48 ms. Each device retry can potentially result in the MAC sending the
packet four times (one try plus three retries).
Parameter range
0 - 6
Default
0
TO command
Set/read transmit options for Transparent mode.
Bit Meaning
0 Disable MAC ACKs.
2 Send to broadcast PAN ID.
Parameter range
0 - 5
Default
0
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