DEXATEK DK9185 Demo Kit User Guide

: June 5, 2024
: DEXATEK

Table of Contents

Document Information
Overview
Hardware Description
Setup your AWS account and Permissions
Create Resources in AWS IoT
Setup your hardware
Build the demo
Run the demo
Troubleshooting
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

DK9185 Demo Kit
Getting Started Guide

Document Information

The DK-9185 Demo kit is based on the RTL8721DM SoC and designed for Extended lot systems.
Revision History (Version, Date, Description of change)
V2.0 2022/06/27

Overview

DK-9185 is a highly integrated single chip with a low-power-consumption mechanism ideal for IoT (Inte
Support AT +
the application set secondary development
Support OTA wireless upgrade
Support Bluetooth smart networking,
Application

IoT
Home automation
Sensor networks
Building automation
Industrial
Retail
Interactive entertainment devices
Remote control
Gaming controller

Hardware Description

3.1 Data Sheet
https://www.dexatek.com/_files/ugd/c97cac_4d6bc3c5f6fd4a829586737bcfeb26e4.pdf

DK-9185 Demo kit Spec

3.2 Standard Kit Contents
DK9185 Demo Kit (D9185 Module + Demo board)
3.3 User-provided items
Micro USB Type A power adapter 5V 1A

Setup your AWS account and Permissions

Users do NOT need to set up an AWS account, user will be using Dexatek’s AWS cloud infrastructure. After a user purchases Dexatek’s device, the user only needs to download the PP and sign up via the APP. All the required permissions will be granted to the user, due to the integration between AWS Cognito User Pool and Identity Pool. If the User ants/needs to set up their own environment, the user will need to send an email to Dexatek (awspartner@dexatek.com), Dexatek’s engineer will contact and support them.

Create Resources in AWS IoT

Resources are created when pairing, these are the steps

a. User presses the reset button for 3 seconds on the device, the device becomes “pairing mode”
b. User turns on the “Bluetooth” of their phone,
c. The user opens our APP and follows the pairing wizard
d. Once APP receives all the information it needs, the APP sends the payload to a Dexatek-developed Lambda API called “AddDevice”, developed by Dexatek, by making the HTTP POST call (“device”).
e. The Lambda API returns an OTP (One-Time Password). Note: Most of the AWS IoT Resources are created in this step:
• The “AddDevice” API helps to create “IoT Things”, “IoT Device Shadow”, “Map to the correct thing type” and “create IoT Policy”, and users don’t need to create these manually.
• Device Certificate has not yet been generated and Device has no IoT Core permission or connectivity up
to this point.
f. APP sends the OTP to the Device via Bluetooth
g. Device makes an HTTP POST call to Lambda API, API named “GenerateCerts” and developed by Dexatek, OTP will be included in the payload, then Lambda API returns an AWS IoT Certificate. IoT certificate is generated in this step, “GenerateCerts” API help to create IoT Certificate, and bind the IoT Certificate to the IoT Policy. Users don’t eed to worry about the relationship between IoT Policy and IoT Certificate.
h. Device will save the AWS IoT Certificate in the Flash, and use this credential to interact with AWS IoT Core.
Note: The device should have IoT connectivity by now

By doing Step a ~ h, all the required resources will be created by the Lambda API, which is developed by Dexatek 6 Provision the Device with Credentials
Please reference points 5d to 5h.

Setup your hardware

DEXATEK DK9185 Demo Kit

Connect your IoT device (e.g. sensor….)
Plug in the USB Power
Turn on the power switch

Build the demo

8.1 Download the latest version of the “User Guide for installation of the Demo App at product web page as below link. Follow the steps in the User Guide to download and install the app on the phone. https://www.dexatek.com/aws- lot-core-dk9185

Run the demo

Go to the demo APP main page and select the interface your device is connected to

Select the “I2C” Tab to read /write I2C data
Select the “GPIO” Tab to monitor GPIO is High/Low status
Select “UART” Tab to read / write UART RX & TX data

Troubleshooting

Check power indicator to make sure power supply is properly connected.
Use minimum 1A current power supply to ensure sufficient power.
Follow point 8 to connect the device again to solve the pairing issue.
If the above steps do not solve the issue, please power off and double-check your device is connected to the connector.

NOTE – all data and credential information you provide will be stored in Dexatek’s account, and accessible to Dexter. If you have any questions or concerns, please reach out to our support team at awspartner@dexatek.com/ +886 2 8698 4245 #828