Sending a single BLE advertising package fails

RE: Sending a single BLE advertising package fails

run_ar — Thu, 02 Apr 2020 14:40:03 GMT

I do not think there are any special limitations when it comes to advertising in the sd.

There is a old advertisement implementation in github that you could look at (but make sure you adjust the rx buffer size correctly if you decide to port it to nRF52); https://github.com/NordicPlayground/nRF51-multi-role-conn-observer-advertiser,

Not sure if we have something publicly available for nRF52.

RE: Sending a single BLE advertising package fails

Sami — Fri, 20 Mar 2020 16:29:48 GMT

I have also decided to try the beacon example which uses SoftDevice S132. Indeed it might be the most simple approach. However, I hope that the support engineer has time for this issue, because sometimes the BLE stack does not provide enough flexibility.

RE: Sending a single BLE advertising package fails

run_ar — Fri, 20 Mar 2020 15:44:54 GMT

Hi,

Wouldn't it be much simpler to use our already qualified Bluetooth stack to do advertising for you? I.e. one thing is to configure the radio to send a packet on a fixed channel every minute, but it might be quite a hassle to qualify this?

RE: Sending a single BLE advertising package fails

Sami — Thu, 19 Mar 2020 15:43:53 GMT

I noticed that the frequency settings have nothing to do with the channels. It seems that channels 37, 38, and 39 which have been reserved for BLE advertising are located at 2,402, 2,426, and 2,480 MHz frequencies. As a consequence, the frequency settings should be 0x02, 0x1A, and 0x50 respectively.

However, I tested all the frequencies, but nRF Connect still cannot find anything. Here is a sample code for channel 37 (2,402 MHz):

NRF_RADIO->FREQUENCY = (0x00 << 8) +    // Channel map between 2,400 ... 2,500 MHz
                        0x02;           // Channel 37 ... 2,402 MHz

RE: Sending a single BLE advertising package fails

Sami — Thu, 19 Mar 2020 09:08:20 GMT

I tried to set the frequency and the channel as follows:

NRF_RADIO->FREQUENCY = (0x00 << 8) +    // Channel map between 2,400 ... 2,500 MHz
                        0x25;           // Channel 37

I also tested channel map between 2,360 ... 2,460 MHz. I have also tested channels 38 and 39. nRF Connect cannot find anything.

RE: Sending a single BLE advertising package fails

Turbo J — Wed, 18 Mar 2020 17:51:10 GMT

I don't see you setting NRF_RADIO->FREQUENCY anywhere in the code. Default frequency is not in the set used for BLE advertising.