Digi XBee 3 Cellular LTE-M User Manual page 256

API frames
Field name
Protocol
Transmit options
Payload
Digi XBee® 3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide
Field
value Data type Description
Byte 0 = UDP
1 = TCP
4 = SSL/TLS
Note
network. Contact your network provider for details.
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
Ignore this bit for UDP packets.
All other bits are reserved and should be 0.
Variable Data to be transferred to the destination, may be up to
1500 bytes.
UDP is limited to 512 bytes.
Transmit (TX) Request: IPv4 - 0x20
For NB-IoT, TCP support is dependent on the
Timeout).
TM
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