LinkIt 7697 BLE FOTA

How to use BLE to do FOTA (Firmware update) 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_fota: Android studio project files.
• project/linkit7697_hdk/apps/ble_fota: LinkIt SDK project files.
• fota_blink_hi.bin: A sample "FOTA ready" bin for testing firmware update.
  • This firmware will blink usr led of Linkit 7697 HDK in a Morse code "HI" pattern (4 dot + 2 dot).
  • Wikipedia link of Morse code.

How to Build

Device Side

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

Mobile Side

• Extract android/ble_fota to anywhere you prefer
• Have Android studio open the project
• Build->Make Project
• Run->Run Application
• Have fota_blink_hi.bin downloaded to your phone.

Firmware for FOTA update

• Check FOTA ROM Package tool (can be found in [SDK_root]/tools/PC_tool.zip or at Tools section of Labs)
• This tool can turn a normal firmware (used by flashtool) into a FOTA ready firmware (used by FOTA).

How to Run

Phases

• A. Turn on Device, when it is ready, it will start "BLE Advertising" (appear as BLE_FOTA). Launch Android App, Scan and connects to BLE_FOTA Device.
• B. After connected, the state should become "Connected", Click "LOAD BIN" and select fota_blink_hi.bin
• C. Wait for FOTA transmission complete
• D. Check USR LED of LinkIt 7697 HDK. It should blink in a Morse code pattern (4 dot and 2 dot) which means "HI"

Mobile Side

Device Side

Below are log output from UART port of LinkIt 7697 HDK

Message Sequence Chart