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? 

[Carey]

ok, now i try to send more packets in each connection event, when i use moble phone for receive, it seems the maximum can send three packets per connection( packet 251byte, interval 7.5ms, ), but if i use 52832 "ble_central\ble_app_uart_c" example to recive, it seems just can receive one packets per connection, Why?  should i modify some parameter in the code? How to change it? 

[Ulrich Myhre]

I forgot to mention that you should probably increase the TX queue for write commands or HVN (depending on your mode of transport). The peer should keep pulling events, and must also have similar parameters set for event length (or enable event extension), DLE and ATT MTU size.

[haakonsh]

Hey Carey,

First you need to request an update of the PHY to 2mbps: PHY Update Procedure.

Then you need to request an update of the MTU size: GATTS ATT_MTU Exchange. 

Then you need to request an update of the Data Length: Data Length Update Procedure.

 

See this blog post for more information: https://devzone.nordicsemi.com/b/blog/posts/throughput-and-long-range-demo 

Cheers,

Håkon.