Connection Interval

[saeed mahvis]

Hi

How can I increase the connection interval of BLE radio from default value of 30mS-50mS  to 600ms in NRF5340-SDK.

[Einarh]

Hello!

The connection interval can be adjusted using Zephyr's Bluetooth API:

https://docs.zephyrproject.org/latest/reference/bluetooth/connection_mgmt.html

To learn how to use this API I would recommend having a look at the BLE throughput sample:

http://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/throughput/README.html

Notice how a bt_le_conn_param struct is defined using the BT_LE_CONN_PARAM() macro, and how that is used in the bt_conn_le_param_update() function to adjust the parameters.

Best regards,

Einar

[saeed mahvis]

Hi

Thank you very much for your information. But I want to increase the Connection interval in peripheral_uart sample code.

Would you please to guide me to modify this program to work with a different Connection interval. I defined the

bt_le_conn_paramm struct at the top and call the  bt_conn_le_param_update() function in the main part of program.

It didn't work.

[Einarh]

Hi

From my understanding, the procedure for modifying the connection interval from a peripheral should be the same, but there might be a significant delay before the changes take effect.

Is the param update function returning an error code, or are you just observing that the behavior doesn't change?

I would recommend going through the BLE throughput sample more thoroughly, in case you've missed a step of the procedure.

-Einar

[saeed mahvis]

Hi

I tried compiling and building the so called program with nRF Connect SDK V1.6.1 and it worked perfectly.

But by compiling and building with nRF Connect SDK V1.8.0  which is a newer version it didn't work and

the chip is resetting repeatedly.

my nRF Connect for desktop version is 3.10.0

[Einarh]

Hi

What program are you seeing this behavior with?

Is it the throughput sample itself or your own custom application?

-Einar