Advertising on a single channel in nrf51822

[Deepak Kumar]

hi, i am using sdk 10, with s120.

i want to advertise data on a single channel with frequency say (2426). is there any sample code or something, with which i can play with.

thanks!!

[FA]

Hi,

If you meant BLE advertising you can look at Kristin's answer on this post: devzone.nordicsemi.com/.../

It's for S110 v8, but I have tested it in S110 and S130 v9 and it should be in SDK 10 too. You can look for ble_gap_adv_params_t --> ble_gap_adv_ch_mask_t in infocenter.nordicsemi.com/ for more information.

A tutorial on simple BLE advertising is also in devzone.nordicsemi.com/.../.

Hope it helps, FA

[Deepak Kumar]

i am not able to understand how do i inmplement this. in ble_gap_adv_ch_mask_t structure i found 3 channel as follows

uint8_t ch_37_off : 1;
uint8_t ch_38_off : 1;
uint8_t ch_39_off : 1;

now how should i implement this in my main program. please help me. thanks!!

[Deepak Kumar]

the struct ble_gap_adv_params_t --> ble_gap_adv_ch_mask_t give the option to turn any advertising channel OFF. i am not able to use this in my main program. how can i use this to disable the channel.

[FA]

If you define:

static ble_gap_adv_params_t m_adv_params;
static ble_gap_adv_ch_mask_t ch_off;

Then in your advertising_init function you should have something like:

// Initialize advertising parameters (used when starting advertising).
    memset(&m_adv_params, 0, sizeof(m_adv_params));

    m_adv_params.type        = BLE_GAP_ADV_TYPE_ADV_NONCONN_IND;
    m_adv_params.interval    = NON_CONNECTABLE_ADV_INTERVAL;

You can now just add:

	ch_off.ch_37_off = 0;
	ch_off.ch_38_off = 1;
	ch_off.ch_39_off = 1;
	m_adv_params.channel_mask = ch_off;

This will only advertise in channel 37

[Deepak Kumar]

hi thanks for your reply, i am able to implement the channel. but when i off any one of these 3 channels then , nrf sniffer dongle is not able to detect my advertisement packet.

why it is happening I have no idea. can you please explain me why sniffer is not able to detect when i off any one of these 3 channels.

thanks!!