the speed can not reach 2Mbit/s

[Carey]

I want use two 52DK for BLE transfer demo, one 52DK download nRF5_SDK_15.0.0_a53641a\examples\ble_peripheral\ble_app_uart",  

other 52DK download "nRF5_SDK_15.0.0_a53641a\examples\ble_central\ble_app_uart_c",

and i changed the connection interval to 7.5ms, it seems the speed for two 52832 just can reach to (251B*1000/7.5)=33.5kbyte/s;  is it right?  is it possible to transfer more fast? i heard the speed of BLE5.0 can reach to 2Mbit/s, How to achieve it? 

[John]

You won't be able to do the 2Mbit on the nRF52832. It does not have the radio PHY that supports 2Mbit speeds. You will need to use the nRF52840 that supports the BLE 5 2M PHY. Nordic provides a throughput tester as one of their examples. It will allow you to configure the the nRF52840 PHY for 2M operation and larger MTU sizes needed to achieve the best throughput. Note that I doubt you will ever get to 2Mbit/s transfer rates because the protocol is not 100% efficient. I've gotten up to about 1.3Mbit/s, but not much better. Some of that may be because we have a very busy 2.4 radio spectrum in our office.

[Daniel Wang]

John said:

You won't be able to do the 2Mbit on the nRF52832

All nRF52 series devices support 2Mbit PHY, including nRF52832. It is CODED PHY that is only support on the nRF52840.

[John]

D'oh. Thanks!

[Carey]

ok, understand, but if i use two 52832 for test, could i transfer more fast?  now the speed just can reach to (251B*1000/7.5)=33.5kbyte/s.