LinkIt 7697 BLE serial

How to use BLE to do serial communication 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_serial: Android studio project files.
• project/linkit7697_hdk/apps/ble_serial: 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_serial
• Execute ./build.sh linkit7697_hdk ble_serial under Linux enviornment
• Check generated bin at [SDK_root]/out/linkit7697_hdk/ble_serial/ble_serial.bin
• Use Flashtool to download [SDK_root]/out/linkit7697_hdk/ble_serial/flash_download.ini into LinkIt 7697 HDK

Mobile Side

• Extract android/ble_serial to anywhere you prefer
• Have Android studio open the project
• 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_SERIAL)
• B. Launch Android App, Scan and connects to BLE_SERIAL Device. After connected, the state should become "Connected"
• C. Type some text and press "Send", the reversed text should be received and displayed below

Mobile Side

Device Side

Below are log output from UART port of LinkIt 7697 HDK

Message Sequence Chart