Large data transfer over ble.

Hi,

I would like to have a system such as follows:

  • Taking sensor data storing it locally till around 100 samples (Once per second)
  • Log this data to the SD with a time stamp
  • Then storing this data to an external SD card. (Utilising the fatfs example code in the SDK) Around  2 Mbytes
  • I then want a mobile device to request this data.

What therefore, is the best way of transferring the data from the SD card to BLE to be picked up by the mobile application.

Do I need to set up a GATT connection and wait on a notification change that I set in the Nordic board?

If so is there an example of this or a good starting point.

Would this post be a good starting point? : https://devzone.nordicsemi.com/f/nordic-q-a/553/dealing-large-data-packet-s-through-ble

If so what example is good to work from. Thanks

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