R309 AT Commands
©2015 Telegesis (UK) Ltd - 46 - AT Command Manual (Rev 3.09)
+SCAST – Transmit Data To The Sink
AT+SCAST:<data>
Example
AT+SCAST:Hello world
Notes
- When bit 8 of S10 is set, if a sink cannot
be reached for three consecutive
transmissions the sink is assumed
unavailable and a new one is sought
- The ACK and/or NACK prompt can be
disabled in S0E
- When attaching the node’s EUI64 to the
network frame the maximum payload
reduces to 74 bytes
- 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.
- S-casts can travel up to 30 hops
Use on
All Devices
SEQ:XX
OK
or ERROR<errorcode>
Where <errorcode> represents the error code
explained in section 3.
Prompt
ACK:XX
or NACK:XX
Parameters
Up to 82 bytes are sent to the node’s sink. On
successful transmission the user is given the
sequence 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.
Prompt
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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