Digi XBee 3 Cellular LTE-M, User Manual, Page: 175 / 331

Extended Socket frames Extended Socket example: TCP Listener
Digi XBee® 3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide 175
Field Value
Socket ID 0x00
Client Socket ID 0x01
Remote Address 0x0A 0x0A 4A 9D
Remote Port 0x27 0x11
Socket New IPv4 Client frame:
7E 00 09 CC 00 01 0A 0A 4A 9D 27 11 FF
Note XBee Cellular Cat-1 variants require data to be sent before the connection is presented. Other
variants present the connection as soon as it is made.
Receiving Data from the new socket
After the connection is established, data received from the new socket is contained in a Socket
Receive frame just like any other TCP socket.
Field Value
Frame type
0xCD (Socket Status)
Frame ID 0x01
Socket ID 0x01
Status 0x00
Payload
Hello XBee!
Receive Data indicating data from remote TCP peer:
7E 00 10 CD 00 01 00 48 65 6C 6C 6F 20 58 42 65 65 21 0A 8E
Receive a Socket Status indicating closed connection
You may close the client socket remotely which elicits a Socket Status with a Status of 0x07.
Field Value
Frame type
0xCF (Socket Status)
Socket ID 0x01
Status 0x07 (Connection lost)
Socket Status received from XBee indicating connection lost:
7E 00 03 CF 01 07 28