Maximum datarate configuration with NRF52832

RE: Maximum datarate configuration with NRF52832

Kenneth — Mon, 12 Mar 2018 12:14:00 GMT

"Do you mean to create my own services and characteristics or something else?"

It may help to add a second service and characteristic yes, ideally there is no difference, but depending on your implementation it may.

RE: Maximum datarate configuration with NRF52832

Michael — Mon, 12 Mar 2018 10:47:51 GMT

Thanks Kenneth,

Decreasing the connection interval to 7.5 ms (min and max) helped to achieve about 19Kbytes/s.

So, you think that the only way to increase the datarate is to move from the NUS service to Notifications?

What is the meaning - "more characteristics to write to" ? Do you mean to create my own services and characteristics or something else?

Thank you!

RE: Maximum datarate configuration with NRF52832

Kenneth — Mon, 12 Mar 2018 09:40:46 GMT

Based on your throughput values it looks like you are only successfully sending 1 large packet every connection interval: 247bytes * 1/20ms= 12.3kB/s (with some packet loss I think 10.8kB/s is more realistic). So you can increase throughput by either have shorter interval, e.g. 7.5ms instead of 20ms. Also, you may try to send more packets every connection interval, either by using notifications and/or have more characteristics to write to.

RE: Maximum datarate configuration with NRF52832

Michael — Sun, 11 Mar 2018 06:53:46 GMT

Hello Kenneth,

Thank you for your answer, but it's not very useful for me. I've already seen this example and it has two disadvantages:

1. The example uses notifications, but I need NUS implementation

2. Not many explanations of the defines in the config files and those values

Do my defines in the main question look correct?

Does the actual datarate looks correct?

Thank you very much.

RE: Maximum datarate configuration with NRF52832

Kenneth — Thu, 08 Mar 2018 16:18:40 GMT

Hi, you may take a look at: \nRF5_SDK_14.2.0_17b948a\examples\ble_central_and_peripheral\experimental\ble_app_att_mtu_throughput