nrf52840 as BLE peripheral

RE: nrf52840 as BLE peripheral

Jørgen Holmefjord — Fri, 28 Feb 2020 12:58:06 GMT

If there is no configuration API available in the Arduino library, you will have to modify the Arduino library itself. I recommend contacting the developers of the library to get help with this.

RE: nrf52840 as BLE peripheral

Liam Richardson — Fri, 28 Feb 2020 12:28:42 GMT

Thanks Jorgen,

I've found out that my limitation is the MTU size which is 23 bytes, set by the Arduino library.

Anyway i can override that ?

Thanks,

Liam

RE: nrf52840 as BLE peripheral

Jørgen Holmefjord — Mon, 24 Feb 2020 16:29:01 GMT

Hi,

Most likely, you would not increase the speed by writing any registers directly. The limiting factor is most likely in the Bluetooth link and not in the CPU. I assume you do not want to write your own Bluetooth stack.

Our softdevice is highly configurable. You can probably change some configs in the Arduino libraries you use to make the transfer faster, but it depends on what is exposed and what kind of throughput you are currently getting. This is anyway a question you need to direct to the developers of the Arduino library, as this is not being developed or supported by Nordic.

You can find expected throughput numbers for the softdevice with different BLE configurations in the softdevice specifications.

Best regards,
Jørgen