unable to change BLE PHY from 1M to 2M on nrf52840/5340DK

RE: unable to change BLE PHY from 1M to 2M on nrf52840/5340DK

Simonr — Fri, 30 Aug 2024 06:07:19 GMT

I see there are some changes in your update_phy() snippet compared to the solution main.c you're referring to has some differences, so I assume there could be other things as well on your end.

Best regards,

Simon

RE: unable to change BLE PHY from 1M to 2M on nrf52840/5340DK

dnclem — Wed, 28 Aug 2024 13:56:57 GMT

Hi Simon,

I am not sure how to confirm my BLE version or whether my computer supports advanced features. The firmware for my BLE adapter states "LMP 8.256", which does not appear to correspond to BLE 5.0, in which 2M PHY was introduced, so this would make sense. However I was able to set and read back a 2Mb speed on the connection (between my device and Windows) with the below BLE sample project from Nordic, which uses the same snippets of code as I posted above:

github.com/.../blefund_less3_exer2_solution

So I am confused on whether this is a Windows problem, or some configuration settings that I might be missing in my firmware.

RE: unable to change BLE PHY from 1M to 2M on nrf52840/5340DK

Simonr — Wed, 28 Aug 2024 13:10:10 GMT

Are you sure the Windows/Mac devices support other Bluetooth LE PHYs than the 1MBPS PHY? I don't think it's very normal for computers to have Bluetooth controllers/stacks that support "advanced" optional Bluetooth LE features. Have you tested this between I.E. two nRF52/53 DKs to see if you're able to get 2MBPS to work between them. Or are you saying that you can connect over 2MBPS if you use unmodified sample projects?

Best regards,

Simon