Save sensor data in file and send it over BLE

[Piwy]

Hi,

I use a thingy53 as peripheral and a nrf52840dongle as central devices. I want to use an accelerometer to analyse vibration from the thingy53.

I know that it's impossible to send value by value at maximum frequency the data because i will have many data loss.

Instead i want to save data in a file in QSPI memory and send the file over BLE.

After i want to save it in a computer connected in USB with the a dongle ble nrf52840.

Do you know if there is project like this or even sample that can help me for the peripheral part (thingy53) and for the central part (dongleBLE) ?

Best regards,

Pierre-Yves

[JONATHAN LL]

Hi,


You might need to buffer up more of the sensor data and send larger packets over BLE.

It might sound like you want to sample data with the Thingy53, there is in fact some examples here for this, Edge impulse have some tools for this type of work. Maybe that is what you are looking for? 


If so here is some info:
https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/thingy53-machine-learning  

https://docs.edgeimpulse.com/docs/development-platforms/officially-supported-mcu-targets/nordic-semi-thingy53 


Regards,
Jonathan

[Piwy]

Also i don't know if BLE NUS is the good solution to my issu, i also saw Object Transfer Service that could help me about this but i don't find many imformation about it.

[Sigurd]

Hi!

I think BLE NUS could be a good option. If you want to start with something simple, then use the central_uart sample on the dongle: https://github.com/nrfconnect/sdk-nrf/tree/main/samples/bluetooth/central_uart