Digi XBee 3 User Manual

Extended Socket frames Extended Socket example: TCPListener
Digi XBee® 3 Cellular LTE Cat 1 AT&T Smart Modem User Guide
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Extended Socket example: TCPListener
The following example demonstrates setting up a TCP listener on the XBee Cellular and interacting
with incoming connections. It will open up a listener socket on a given port and then receive data from
a client.
Note The module must either have a public IP or a be on a private network in order to be accessible
as a server (listener).
Send a Socket Create frame
Note The XBee Cellular does not support incoming TLS sockets.
Field Value
Frame type
0x40 (Socket Create)
Frame ID 0x01
Protocol 0x01 (TCP)
Socket Create frame data:
7E 00 03 40 01 01 BD
Receive a Socket Create response
The response contains the socket ID assigned. This example assumes zero.
Field Value
Frame type
0xC0 (Socket Create Response)
Frame ID 0x01
Socket ID 0x00
Status 0x00 (Success)
Socket Create Response received from XBee:
7E 00 04 C0 01 00 00 3E
Designate the socket as a listener
The Socket Bind/Listen Frame takes the socket ID from the socket create response and a source port
that the socket will then listen on. In this example port 10001 is used.

Digi XBee 3 Specifications

General

Model	XBee 3
Category	Modem
Frequency Bands	2.4 GHz, 868 MHz, 900 MHz
Interface	UART, SPI, I2C
Operating Temperature	-40° C to +85° C
Power Supply	2.1V to 3.6V
Antenna	External or onboard
Transmit Power	up to 20 dBm
Security	AES encryption
Protocols	Zigbee, 802.15.4, DigiMesh

Summary

Getting Started with the XBee Smart Modem

Connect Hardware and Install XCTU

Step-by-step instructions for connecting hardware and installing XCTU utility.

Update Firmware and Check Connection

Procedures for updating device firmware and verifying cellular connection status.

XBee Connection Examples

Getting Started with MicroPython

MicroPython Basics and Setup

Introduction to MicroPython and setting up the environment using XCTU.

MicroPython Examples

Update the Firmware

Plan for Firmware Updates

Update Device and Cellular Firmware

Procedures for updating device and cellular firmware using XCTU.

Update Telit Modem Firmware with XFP Utility

Instructions for updating the Telit modem firmware using the XFP utility.

AT Commands Reference

Special, Cellular, and Network Commands

Reference for special, cellular, and network configuration AT commands.

I/O, Sleep, and Mode Commands

Configuration commands for I/O settings, sleep modes, and operating modes.

File System, BLE, Socket, and API Commands

Commands for file system, BLE, sockets, and API frame management.

Troubleshooting Guide

Serial Port and Driver Issues

macOS Java Errors and Bypass Mode Issues

Network, SMS, and Baud Rate Troubleshooting