AWS Connection Guide

Getting Started

Hardware Requirement

• Desktop or laptop computer
• MicroUSB cable
• LAN cable
• WIZ510SSL
• WIZ510SSL-EVB

Software Requirement

• Preferred Serial Terminal (TeraTerm, YAT, etc.)
• AWS Console account

AWS IoT Core preparation before start

• Sign to console
• Create a thing
• Create a policy

important

Save certificates and key during creation. AWS root CA can be downloaded from here

Introduction

AWS IoT provides secure, bi-directional communication between Internet-connected devices such as sensors, actuators, embedded micro-controllers, or smart appliances and the AWS Cloud. It is possible to connect to AWS via WIZ510SSL and send data using MQTTS.

In this document we will provide guide how to connect to AWS services. Process consists of following steps:

• Creation of AWS account
• Creation & configuration of Thing in IoT Core
• Connection & Message transfer

For this guide we used evaluation board WIZ510SSL-EVB

Device preparation

Device connection

Please check COM port number in Device Manager.

tip

If COM port cannot be found in Device Manager, please install drivers below.

• Silicon Labs CP210x USB to UART Driver

Configuration Description

There are two ways how to configure WIZ510SSL: using ConfigTool and using AT Commands.

1. Configuration using AT commands

Please refer to [Command Manual] to find information about all AT Commands. Below we will describe commands created for AWS connection.

Description	Command	Remark
Set network configuration to DHCP	IM1
Set operation mode to MQTTS client	OP6
Set remote host	RH<parameter>	Use AWS endpoint
Set remote port to 8883	RP8883
Set packing time	PT500	500 is given as example
Set Client ID	QC<parameter>	Use Thing name
Set Public Topic	PU<parameter>	$aws/things/<Thing Name>/shadow/update
Set Subscribe Topic	U0<parameter>	$aws/things/<Thing Name>/shadow/update/accepted
Set MQTT Keep Alive time	QK60	60 is given as example
Set Root CA option	RC2	2 - required
Enable Client Certificate	CE1	1 - enabled
Save Root CA	OC
Save Client certificate	LC
Save Private Key	PK
Save settings	SV
Reboot device	RT

Please note that WIZ510SSL supports multiple command setup. It is possible to make above settings as following:

IM1\r\nOP6\r\nPT500\r\nQC"Thing Name"\r\nRH"End Point".amazonaws.com\r\nRP8883\r\nPU$aws/things/"Thing Name"/shadow/update\r\nU0$aws/things/"Thing Name"/shadow/update/accepted\r\nQK60\r\nRC2\r\nCE1\r\n

To save Root CA, Client Certificate or Private Key we used YAT file transfer function.

First, add appropriate command name in the beginning of the file.

Refer to below example:

Use following EOL settings:

Each certificate shall be sent separately.

It is necessary to save settings and reboot device.

SV\r\nRT\r\n

2. Configuration using Config Tool

Please refer to [Config Tool Manual] to find detail information about Config Tool. Below we will show configuration required for AWS connection.

Step 1.

Setup DHCP select following:

Make settings in MQTT Options tab:

Make settings in Certificate Manager tab:

Step 2.

To load certificates/keys follow below steps:

• Click "Load File" button. File explorer window will appear.

• Select file and click "Open"

tip

Select original file, not the file with added AT command!

• Click "Save to device" button. If succesful, "Upload Complete" pop-up window will appear.

tip

When saving certificate or key, "Save to device" button shall be pressed for each one. "Apply settings" button will NOT save certificates/keys to device.

Step 3.

Press "Apply settings" button to save settings made in Step 1. Reboot device.

Results

1. Send test message using Terminal

2. Since we subscribed to "updated" topic, when MQTT message is sent we can see reply message instantly. Also it is possible to check in AWS IoT -> Manage -> Things -> Shadow or Activity

Congratulations

WIZ510SSL is successfully connected to AWS!