How to test one channel Advertising?

RE: How to test one channel Advertising?

Kenneth — Wed, 12 Sep 2018 11:57:54 GMT

Maybe you have several devices advertising, because I can confirm that:

"I have now tried ble_app_beacon example, with only one addition in advertising_init():
m_adv_params.channel_mask[4] = 0x60;
I can confirm it only advertise on channel 39 using an Ellisys Bluetooth sniffer."

Can you try the same?

RE: How to test one channel Advertising?

Alan Ajit — Wed, 12 Sep 2018 09:29:25 GMT

printed the channel index scanning happens properly as per setting but advertising is not properly done in one channel

RE: How to test one channel Advertising?

Kenneth — Wed, 12 Sep 2018 08:53:00 GMT

Any difference if using extended = 0? Are you printing out p_adv_report->ch_index?

Best regards,
Kenneth

RE: How to test one channel Advertising?

Alan Ajit — Wed, 12 Sep 2018 07:54:45 GMT

Thank you

I set 39 channel for Advertising and in scanner 37 and 38 channel for scanning

Modification in Advertiser:-

m_adv_params.channel_mask[4] = 0x60; (for 39 channel)

Modification in Scanner:-

static ble_gap_scan_params_t const m_scan_params =
{
.extended = 1,
.active = 1,
.interval = SCAN_INTERVAL,
.window = SCAN_WINDOW,
.timeout = SCAN_DURATION,
.scan_phys = BLE_GAP_PHY_1MBPS,
.filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,
.channel_mask[4] =0x80,
};

for 37 and 38 channel scanning

but scanner gets Advertising is it any wrong in my procedure?

RE: How to test one channel Advertising?

Kenneth — Wed, 12 Sep 2018 07:34:41 GMT

Seems they always change the parameters..

I have now tried ble_app_beacon example, with only one addition in advertising_init():
m_adv_params.channel_mask[4] = 0x60;

I can confirm it only advertise on channel 39 using an Ellisys Bluetooth sniffer.

Best regards,
Kenneth

RE: How to test one channel Advertising?

Alan Ajit — Wed, 12 Sep 2018 05:16:13 GMT

Thank you for reply I am using SDK 15

and i tried to like you said above in advertising_init() but its show error that's why I am using (m_adv_params.channel_mask[4] =0x60;)

but advertising in one channel is not working

can you help how to implement this in my application?

RE: How to test one channel Advertising?

Kenneth — Tue, 11 Sep 2018 14:19:37 GMT

Can you init as it is intended by:

m_adv_params.channel_mask.ch_37_off = 1;
m_adv_params.channel_mask.ch_38_off = 1;

Instead of:

m_adv_params.channel_mask[4] =0x60;

RE: How to test one channel Advertising?

Alan Ajit — Tue, 11 Sep 2018 13:38:27 GMT

Thank you

I tested this with two device one is act as receiver and other is for advertising

Advertiser Side:-

I change inside advertising_init()

ble_gap_adv_params_t m_adv_params;

m_adv_params.channel_mask[4] =0x60; // advertising only in channel 39

and also i changed Receiver side:-

this is for scanning channel 38 and 37

Here i get the advertising packets in 38 and 37 channel

is it any wrong in my procedure?

set Advertising ---->39 channel

set Scanning----->37 and 38 channel

but i get advertising in 37 and 38 channels

can you help me to solve this issue?

RE: How to test one channel Advertising?

Kenneth — Sun, 09 Sep 2018 18:23:57 GMT

Hello,

The best is if you have access to a spectrum analyzer then you can measure the actual output.

Alternatively if you measure the current consumption, you should also see that the average current consumption drops a bit when using 1 instead of 3 channel.

Best regards,
Kenneth

RE: How to test one channel Advertising?

Alan Ajit — Thu, 06 Sep 2018 04:46:56 GMT

Thanks for replay i see that

based on that i change like above

everything works fine but i don't know BLE advertising is in one channel

is it my step above mentioned is right?

is it any way to test to check the channel of advertising?

can you help me to solve this ?

RE: How to test one channel Advertising?

Kenneth — Wed, 05 Sep 2018 14:05:27 GMT

Hello,

Check out:
https://devzone.nordicsemi.com/f/nordic-q-a/11401/advertising-on-a-single-channel-with-s132/42970#42970

Old thread, but still valid.

Best regards,
Kenneth