How to extract maximum throughput from the peripheral_uart example?

[Thiago]

Hi.

I am working with the nrfConnect SDK 1.8.0. I would like to configure the nrf5340 for maximum throughput to work as a server for a smartphone device.

How should I modify the peripheral_uart example to enable the 2 Mbps PHY data rate, change the connection interval, maximize the data length and the ATT_MTU_size? 

Thank you.

[Thiago]

After trying for a bit, I found this ticket. I tried to follow the given advice but the code was not building after I made the changes. I tried a few times,  and eventually, it worked, although I still don't know why it suddenly worked.

However, I cannot send strings (to an Android phone using the nrf Connect app) longer than 182 bytes. Also, the throughput doesn't seem high. How can I know for sure the bandwidth? Is it possible using the nrf Connect app?

[Thiago]

Also, the prj.conf file shows this error:

I tried to find the required macros, but if I define them, the code won't build.

[Amanda Hsieh]

Hi,

Try to add CONFIG_BT_USER_PHY_UPDATE=y in the prj.conf file

Attached below is an example my colleague put together to test notification throughput with the Nordic UART service using the project configuration you posted above. There is a folder named "child_image". The build system will automatically pick up configurations from this folder in multi image builds, see Image-specific variables. And in that folder,  it has the hci_rpmsg.conf file to override the default configurations settings for the HCI RPMsg child image.

Attachment: nus_throughput.zip

Regards,
Amanda