API frames Socket SendTo (Transmit Explicit Data): IPv4 - 0x45
Digi XBee® 3 Cellular LTE Cat 1 AT&T Smart Modem User Guide
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Socket SendTo (Transmit Explicit Data): IPv4 - 0x45
Description
A Socket SendTo (Transmit Explicit Data) message causes the device to transmit data using an IPv4
address and port. For a non-zero frame ID, this will elicit a Transmit (TX) Status - 0x89 frame.
If this frame is used with a TCP, SSL, or a connected UDP socket, the address and port fields are
ignored.
You must perform a Socket Bind/Listen - 0x46 frame for a UDPconnection before you attempt a
SendTo in order to assign a source port.
Format
The following table provides the contents of the frame. For details on frame structure, see API frame
format.
Field name
Field
value Data type Description
Frame type 0x45 Byte
Frame ID Byte A reference identifier
used to match status
responses. If set to 0, the
Transmit (TX)Status -
0x89 frame is disabled.
Socket ID Byte ID of the socket to send
on.
Destination address 32-bit big endian
Destination port 16-bit big endian
Transmit options Byte bit-field Reserved
Payload Variable Data to be transferred to
the destination, up to
1500 bytes.