QCA402x Qualcomm Mesh User Guide - February 2018

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"80-y9381-4_ac_qca402cx_qualcomm_mesh_user_guide" 本文档是QCA402x Qualcomm Mesh网络用户指南，版本80-Y9381-4 Rev.AC，发布于2018年2月。QCA402x系列是Qualcomm Technologies Inc.推出的一种用于构建Mesh Wi-Fi网络的芯片解决方案，旨在为物联网（IoT）和智能互联设备（IOE）提供高效、稳定且覆盖广泛的无线连接。 Mesh Wi-Fi是一种网络架构，它允许Wi-Fi信号通过多个设备（称为节点或接入点）进行多跳传输，而不是依赖单个路由器。这种设计显著增强了家庭和商业环境中的网络覆盖和容量，特别是在物理障碍较多或需要大面积覆盖的情况下。QCA402x系列芯片支持这种技术，为用户提供了无缝漫游和自我修复的网络体验。在用户指南中，读者可以期待找到关于如何设置和管理基于QCA402x的Mesh网络的详细步骤。内容可能涵盖以下关键知识点： 1. **硬件安装**：如何正确安装和配置QCA402x支持的Mesh Wi-Fi节点，包括电源连接、物理位置选择以及与现有网络的连接。 2. **软件配置**：使用何种工具或应用程序来设置和管理Mesh网络，如何配置网络名称（SSID）、密码、安全设置以及固件更新。 3. **网络扩展**：如何添加更多节点以扩大网络覆盖范围，以及如何确保新节点自动集成到现有Mesh网络中。 4. **性能优化**：如何调整网络设置以优化速度、稳定性，以及处理高并发用户和设备的情况。 5. **故障排除**：提供了解决常见网络问题的指导，如连接问题、速度下降或设备无法接入网络等。 6. **安全性**：详细解释了QCA402x提供的安全特性，如WPA2、WPA3等加密协议，以及如何保护网络免受未经授权的访问。 7. **物联网和IOE支持**：QCA402x芯片可能集成了对IoT设备的支持，包括低功耗蓝牙（BLE）和其他通信协议，用户指南会介绍如何将这些设备连接到Mesh网络，并确保数据安全传输。 8. **国际和美国出口法规**：文档提到了出口法规，表明用户在跨地区使用或销售基于QCA402x的产品时，必须遵守相关的出口控制法律。此外，文档还包含了修订历史，显示了从AA版（2017年10月）到AC版（2018年2月）的编辑修订情况，确保用户获得最新的信息和改进。总体而言，这份用户指南为那些希望利用QCA402x芯片构建和管理Mesh Wi-Fi网络的用户提供了全面的技术支持和操作指南，无论是家庭用户还是专业网络管理员都能从中受益。

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2.2 Set up the Qualcomm Mesh environment

Complete the following steps to get started with Qualcomm Mesh:

Procedure

1. Confirm that the SDK structure is as described in section 3.1.1 QCA402x SDK Contents of the

QCA402x Programmers Guide. The QCLI_Demo folder contains the application with some

Qualcomm Mesh-specific code that demonstrates the Qualcomm Mesh capabilities.

2. Choose whether to compile the QCA402x application code using the GNU toolchain or the IAR

workbench, as described in section 3.1.2 Supported Toolchains of the QCA402x Programmers

Guide.

3. Install the required toolchain.

4. Follow the steps provided in section 3.1.3 Other Requirements of the QCA402x Programmers

Guide.

5. Install Python version 2.7. Note that Python versions 3.x and above are NOT supported.

6. Change the property PLATFORM MAX TIMERS in the file demo\QCLI_demo\src\export

\DevCfg_master_devcfg_out.xml from the default value of 10 to 50. For details about how

this configuration works, see section A.1.1 Configuring an application of the QCA402x

Programmers Guide.

7. Set the following environment variable, which is specific to compiling the Qualcomm Mesh

capability of the QCLI_Demo code:

set QMESH=true

8. Follow the instructions for building - ensure that all the relevant environment variables are set,

including the Qualcomm Mesh-specific environment variable:

a. Section 3.1.5 Building with GCC of the QCA402x Programmers Guide if you have chosen to

use the GNU toolchain.

b. Section 3.1.6 Building with IAR of the QCA402x Programmers Guide if you have chosen to

use the IAR toolchain.

9. Follow the instructions for flashing the compiled image on to the QCA402x chip, see section 3.1.7

Flashing the Application of the QCA402x Programmers Guide.

NOTE When you add Qualcomm Mesh to the demo, the resulting elf image file of the demo

application increases to more than 1.7 MB, which then increases the final flash image

to more than the maximum flash size of 2 MB. Compile out some of the sections of

the demo app that are not required for Qualcomm Mesh to reduce this. However,

when you do this, the menu option number for Qualcomm Mesh changes and will be

different from the one given in this guide. For example, in the build.bat file for the

demo app, comment out the lines where these two parameters are set (add REM to

the start of these lines): CONFIG_PERIPHERALS_DEMO or CONFIG_THREAD_DEMO.

2.3 Congure the serial port

For information on how to set up a UART connection to the board, see section 3 of the QCA402x

Development Kit Quick Start Guide.

QCA402x Qualcomm Mesh User Guide Geng started with Qualcomm Mesh

80-Y9381-4 Rev. AC MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION 16

An unprovisioned device cannot initially send or receive mesh messages, but it can advertise its

presence to a provisioner to be invited into a mesh network. The unprovisioned device becomes a

node when it is authenticated.

Provisioner

A provisioner creates a network of devices. It assigns a unique device address to each device that it

provisions in the network, along with the application key and the network key. The keys secure the

network from any threats or attacks. A gateway or a mobile phone is usually a provisioner in the

context of mesh.

Node

A device is an object that provides a certain set of functionalities or features that can be configured

and controlled. For example, a light bulb can be turned on and off, and dimmed when it is on. In some

cases, the device can also notify the outside world of information based on measured factors. For

example, a temperature sensor can notify the change in room temperature, but it can also be

configured to send a notification only when the temperature exceeds or falls below a certain

temperature. A device can also have more than one function. For example, it can be used for changing

the light color as well as the level of brightness. Such a device can be implemented using Qualcomm

Mesh.

A physical object, or node, contains information about the vendor, the product, and the version, as well

as the features and the number of elements supported by the physical object, and their descriptions.

A single node can consist of multiple devices, which are referred to as elements. Each of these

elements has a unique address by which they can be identified. For example, Figure 3-2 shows a light

device (the physical object) that contains two light bulbs (addresses:0x8001 and 0x8002), each

representing a unique element on one physical object. Similarly, the switch box is one physical device

with three switches (0x8003, 0x8004, and 0x8005), each representing a unique element.

When a physical object has multiple elements, the elements are ordered, with the first element

performing specific roles and conforming to specific constraints. A node device beacons to become

part of a network. The provisioner assigns unique addresses in the network to node devices. If the

node has multiple elements, then the subsequent addresses are set as sequential addresses by the

node itself. The provisioner ensures that these addresses are not assigned to other nodes.

Figure 3-2 Node devices - light bulbs and switches

3.2 Device addresses

The provisioner assigns a primary unicast address to a device. The secondary elements have

addresses that follow sequentially. For example, if the provisioner assigns the address 0x8000 to a

node with three elements, the addresses for those elements are 0x8000, 0x8001, and 0x8002. This

is the only address that is valid in the source address field of a message.

QCA402x Qualcomm Mesh User Guide Qualcomm Mesh overview

80-Y9381-4 Rev. AC MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION 19

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