Maximizing the datarate over Bluetooth Low Energy, in a connection between two nrf52832 devices

[Chiaq]

Good morning,

I want to develop my application based on the ble_app_uart_c and ble_app_uart examples (each one downloaded in a different nrf52832 development kit).

My goal is to maximize the throughput of the data sent through BLE. Many other threads suggested looking at the throughput example in the SDK, but I still don't get which variables and things need to be modified to get the maximum data rate (that should be around 1.38 Mbps). I need some more practical information, such as where to modify the physical layer frequency (I want 2MHz) in the ble_app_uart_c and ble_app_uart examples.

Any help would be really appreciated :)

Best Regards,

Chiara

[Kazi Afroza Sultana]

Hello Chiara,

Here you can see the parameters https://infocenter.nordicsemi.com/topic/sds_s140/SDS/s1xx/ble_data_throughput/ble_data_throughput.html?cp=5_7_4_0_16, you should use. Some of the parameters can be controlled in the sdk:config file and some needs to be handled in the initialization of scanning/advertising (like phy).

You can look at this example nrf52-ble-app-uart-error-resources/main.c at master · too1/nrf52-ble-app-uart-error-resources · GitHub. 

[Chiaq]

Good morning!

Thank you I'll look at the links you sent.

Do you know how I can test the throughput of a connection? Which is the best set-up to do that?

[Kazi Afroza Sultana]

Hello,

You can look at this throughput Bluetooth: Throughput — nRF Connect SDK 2.3.99 documentation (nordicsemi.com) samples and also there is a good reading here; Bluetooth 5 & BLE: Achieving maximum throughput and speed | Novel Bits. 

[Chiaq]

Hi,

I already saw these links, but it's not helping because I would like to check how is the throughput with my code between the two devices. I was referring maybe to the nrfSniffer tool. Is it possible with that to see the throughput?

Moreover trying with the values of the connection parameters shown in the links you sent previously I got at a maximum of 800kbps as throughput, how is that possible?