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]

Hi, I just checked the machine learning and edge impulse, if i understand it welle, they use BLE NUS to send data and save it in a json file ?
I will explain my setup, i have an the thingy53 witch is the peripheral device with the accelerometer that i want to use at his maximal frequency.
With the BLE NUS, i can send many data in one time.
My other device is like a nrf52840dongle with the sample bluetooth shell, it's my central device.I want to do a thread in the central device that receive accelerometer data on the BLE Nus service and put in directly in a file over serial or something like that.
The machjine learning app or edge impulse are really complicated, can oyu help me ?

Regards,

Pierre-Yves
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