R309 AT Commands
©2015 Telegesis (UK) Ltd - 45 - AT Command Manual (Rev 3.09)
+UCASTB – Transmit A Unicast Of Binary Data
AT+UCASTB:XX,<address>
Where
<address>
can
be
the
remote
node’s
EUI64, Network address or address table index
and XX is the number (in hexadecimal) of data
bytes to be sent.
Notes
This command is particularly useful if the data
may contain <CR> and <Backspace>
characters.
The ACK and/or NACK prompt can be disabled
in S0E
Unicasts can be addressed either by referencing
the recipient’s EUI64, Network address or an
entry in the address table.
The maximum payload is 82 bytes. It is reduced
by 8 bytes when appending the EUI to the
network header (default) and also it is reduced
by 2 bytes per hop in case a source route is
known. The latter event can neither be
suppressed nor foreseen.
Up to 10 unicasts may be in flight at one time
Unicasts can travel up to 30 hops
Use on
All Devices
Response
> <data being entered>
SEQ:XX
OK
or ERROR:<errorcode>
Prompt
ACK:XX
or NACK:XX
Parameters
XX ranging from 00 to 52 (hex)
After the ‘>’ prompt a number of characters are
expected to be entered as defined by XX. Up to
82 bytes are sent to the node with address
<EUI64>.
When bit 9 of S10 is set a timeout error is
generated if no character is received for 1
second.
On successful transmission the user is given a
transmission number followed by “OK”. After
that the user is prompted “ACK” on receipt of an
acknowledgement or “NACK” in case the
message was not acknowledged. A NACK does
not guarantee that the message has not reached
its destination.
If bit B of S10 is set, “SEQ”, “ACK” and “NACK”
are not reported. “OK” means that the message
has been acknowledged by the destination.
UCAST:[<EUI64>,]<length>=<data>
or
UCAST:[<EUI64>,]<length>=<data>,
<RSSI>,<LQI>
Where <EUI64> is the address of the sender
and <length> is the length of the message in
hexadecimal. The EUI64 is only displayed if it is
part of the network header (set bit 0 of S10 to
disable attaching the EUI64 to outgoing
messages). RSSI and LQI are shown if bit 6 of
S0F is set.
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