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Reading historical logged data over BLE on app

Hello,

I need to send logged sensor data in external flash to a phone via BLE. What is the best way to accomplish this?

How should the GATT be designed for transferring large chunks of data stored in external memory over BLE to an app? 

Please advice,

Thanks

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  • The size of data to be sent depends on when the phone was last connected to. It can be anywhere between 100 bytes(hourly data) to 500k Bytes(months worth of data). Is there a scheme to make this feasible? 
    Thanks

  • Hi,

    We don't have an example that partition a large set of data and then transmits it, so this is something you would have to make yourself. We do however have examples that shows how to use the necessary functions for sending data such as the ble_app_uart example or our unsupported Image transfer demo on Github

    regards

    Jared 

  • while I review the image transfer demo, Any hints/suggestions about how to go about it?

    Thanks