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API frames
Transmit (TX) Request: IPv4 - 0x20
Digi XBee® 3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide
256
Field name
Field
value
Data type
Description
Protocol
Byte
0 = UDP
1 = TCP
4 = SSL/TLS
Note
For NB-IoT, TCP support is dependent on the
network. Contact your network provider for details.
Transmit options
Byte bitfield Bit fields are offset 0
Bit field 0 - 7. Bits 0, and 2-7 are reserved, bit 1 is not.
BIT 1 =
1
- Terminate the TCP socket after transmission is
complete
0
- Leave the socket open. Closed by timeout, see
(IP Client Connection Timeout)
Ignore this bit for UDP packets.
All other bits are reserved and should be
0
.
Payload
Variable
Data to be transferred to the destination, may be up to
1500 bytes.
UDP is limited to 512 bytes.