LinkIt 7697 BLE smart connection

How to use BLE to do smart connection on LinkIt 7697 HDK

Additinal resource can be found at https://docs.labs.mediatek.com/resource/mt7687-mt7697

- Note. 
- Linkit 7697 HDK is only supported by LinkIt SDK 4.3 and later version. 
- There might be compile error to use them on older version.

Folder Structure

• android/ble_smart_connection: Android studio project files.
• project/linkit7697_hdk/apps/ble_smart_connect: LinkIt SDK project files.

How to Build

Device Side

• Put/Extract the files into SDK root, so that there is [SDK_root]/project/linkit7697_hdk/apps/ble_smart_connect
• Execute ./build.sh linkit7697_hdk ble_smart_connect under Linux enviornment
• Check generated bin at [SDK_root]/out/linkit7697_hdk/ble_smart_connect/ble_smart_connect.bin
• Use Flashtool to download [SDK_root]/out/linkit7697_hdk/ble_smart_connect/flash_download.ini into LinkIt 7697 HDK

Mobile Side

• Extract android/ble_smart_connection to anywhere you prefer
• Have Android studio open the project
• Open DeviceControlActivity.java, modify variable _ssid and _pwd to fit your wireless enviornment.
• Build->Make Project
• Run->Run Application

How to Run

Phases

• A. Turn on Device, when it is ready, it will start "BLE Advertising" (appear as BLE_SMTCN)
• B. Launch Android App, Scan and connects to BLE_SMTCN Device. After connected mobile will automatically send pre-defined Wi-Fi information to Device via BLE
• C. When Device receive the data, it will connect to Wi-Fi network and report back the SSID and IP to Mobile

Mobile Side

Device Side

Below are log output from UART port of LinkIt 7697 HDK

Message Sequence Chart