nrf connect SDK coded PHY nrf52833/20

RE: nrf connect SDK coded PHY nrf52833/20

Muhammad Usman — Mon, 09 May 2022 14:43:13 GMT

Hi ,

Thank you so much for the response! I will go through it. Again thanks

RE: nrf connect SDK coded PHY nrf52833/20

tesc — Mon, 09 May 2022 12:03:49 GMT

Hi,

First of all I am sorry for the long wait.

1) You should set total link count to 20, central link count to 20, and peripheral link count to 0, yes.

2) If you mean a setting for number of links, then the same settings as in 1) are needed for the SoftDevice to support the number of connections. In addition you may need code changes. Some examples connect to one device, then doesn't start any new advertising afterwards (such as e.g. the HID examples.) Other examples have concurrent connections, so they start advertising again after a connection has been set up (as long as there is room for more connections.) This happens for instance in the BLE Multi-link Example.

3) The answers above are for nRF5 SDK. For new projects, we recommend using nRF Connect SDK, also for the nRF52 series. New development will happen in nRF Connect SDK, while the (older) nRF5 SDK is in maintenance mode. See our statement on nRF Connect SDK and nRF5 SDK.

Regards,
Terje

RE: nrf connect SDK coded PHY nrf52833/20

Muhammad Usman — Mon, 18 Apr 2022 19:08:40 GMT

Hi tesc

Thank you for the answer!

1)I am using sdk 17.0.1 / 17.1.2 . nrf board is nrf52833sdk and example i am following is

ble_app_blinky & ble_app_blinky_c .

As you can see in the following image option available is having a default value of 1 for central and the link count for peripheral is 0. How can we set it to 20? for both the central and link count we have to set it to 20 and set peripheral and 0?

2)For nrf connect sdk v1.9.1 using peripheral_hr_coded example. Can you please help me where is the configuration to set the concurrent connection value?

3)We are using nrf52833/20 or nrf52840 sdk for the development what do you suggest me to start with nrf52 sdk or nrf connect sdk ? Because some people said that nrf52 is best for the 52 devices and some suggest nrf connnect sdk.

Thanks in advance!

RE: nrf connect SDK coded PHY nrf52833/20

Muhammad Usman — Wed, 13 Apr 2022 19:16:18 GMT

Hi tesc

Thank you so much for the response! I will go through it and will ask further questions. Sure I will wait until next week.

Enjoy your Vacations! 🙂

Thanks & Regards,

Muhammad Usman

RE: nrf connect SDK coded PHY nrf52833/20

tesc — Wed, 13 Apr 2022 13:34:42 GMT

Hi,

1) See the Bluetooth: Peripheral Heart Rate Monitor with Coded PHY example. It advertises and connects using Coded PHY.

2) Advertisements do not produce ACKs back to the sender. This is by Bluetooth specification. There are two ways a scanner can send packets back to an advertiser:

One is if doing active scanning, where scannable advertisements will trigger a scan request from the scanner. However I am not aware of any hooks onto this where you can know on the advertiser side which scanner has sent a scan request.
The other is if doing connectable advertising, where the scanner (acting as initiator) may send a connection request.

3) nRF5 SDK (using the SoftDevice) and nRF Connect SDK using the SoftDevice Controller has a maximum of 20 concurrent links.

Please note that we are entering Easter vacation in Norway. You may have to wait until next week for answers to any follow-up questions.

Regards,
Terje