How to set sending power of NRF52810 with SDK15.0

RE: How to set sending power of NRF52810 with SDK15.0

Rafael — Fri, 01 Nov 2019 02:52:04 GMT

hi, can I use this way to change the power even when it was configured by initialization? I need to change the tx power many times during the operation of the device.

RE: How to set sending power of NRF52810 with SDK15.0

maxx44 — Tue, 12 Jun 2018 19:32:17 GMT

Edvin (and Liu)

Thanks! The m_advertising.adv_handle worked. And it does appear to increase the transmit power in my module based on just looking at RSSI from a distance.

Appreciate the help,

Max

RE: How to set sending power of NRF52810 with SDK15.0

Edvin — Tue, 12 Jun 2018 10:37:36 GMT

It is correct, as @liu says. You need to use the advertising handle.

The advertising_init is set up a little different in the Beacon example, and in the regular ble_peripheral examples.

You can find the advertising example in the m_advertising struct.

sd_ble_gap_tx_power_set() must be after ble_advertising_init() I am not 100% sure whether it has to be after ble_advertising_conn_cfg_tag_set(), but you will quickly find out.

It should look something like this:

ble_advertising_init(...);

ble_advertising_conn_cfg_tag_set(...);

    err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, 4);
    APP_ERROR_CHECK(err_code);

RE: How to set sending power of NRF52810 with SDK15.0

liu — Tue, 12 Jun 2018 08:33:25 GMT

hello,

I used the example of beacon.

I think it should be like this:

........................................................................................

/** @brief Advertising set handle not set. */
#define BLE_GAP_ADV_SET_HANDLE_NOT_SET (0xFF)

static uint8_t m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET; /**< Advertising handle used to identify an advertising set. */

.......................................................................................

advertising_init();
uint8_t err_adv=sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV,m_adv_handle,+4); //after advertising_init();
advertising_start();

Best regards,

liu

RE: How to set sending power of NRF52810 with SDK15.0

maxx44 — Mon, 11 Jun 2018 19:15:10 GMT

Edvin,

Thanks. What you described is not quite what I see in my SDK example. I'm still not seeing how to set the adv_handle correctly in this context. I've inserted the advertising_init() below. This comes from the bluetoothds_template.

Max

static void advertising_init(void)
{
    ret_code_t    err_code;
    ble_advertising_init_t init;


    memset(&init, 0, sizeof(init));

    init.advdata.name_type               = BLE_ADVDATA_FULL_NAME;
    init.advdata.include_appearance      = true;
    init.advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
    init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    init.advdata.uuids_complete.p_uuids  = m_adv_uuids;

    init.config.ble_adv_fast_enabled   = true;
    init.config.ble_adv_fast_interval  = APP_ADV_INTERVAL;
    init.config.ble_adv_fast_timeout   = APP_ADV_DURATION;

    init.evt_handler = on_adv_evt;

    err_code = ble_advertising_init(&m_advertising, &init);
    APP_ERROR_CHECK(err_code);

    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);

		// Set transmit power to 4 dBm
		err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV,????????,4);
		APP_ERROR_CHECK(err_code);
		
}

RE: How to set sending power of NRF52810 with SDK15.0

Edvin — Mon, 11 Jun 2018 06:22:17 GMT

Hello Max,

I am not quite sure I follow. The m_adv_handle is set the same way for the s112 on the nRF51810 as for the s132 on the nRF52832. The m_adv_handle is an uint16_t, and not uint8_t.

The advertising handle, m_adv_handle is set in the sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &m_adv_params), which is usually called in advertising_init() in most of our examples in the SDK.

Do you get any issues while setting this?

Best regards,

Edvin

RE: How to set sending power of NRF52810 with SDK15.0

maxx44 — Sat, 09 Jun 2018 22:31:15 GMT

I'm trying to do the same thing for a nRF52810 using SD 112 v6.0.0. Can you provide details in how to set m_adv_handle? I'm confused why this is uint16_t as it seems like it should be an address for the advertising data structure. How did you define this?

Thanks, Max

RE: How to set sending power of NRF52810 with SDK15.0

Edvin — Fri, 11 May 2018 14:09:14 GMT

Hello!

Sorry for the late reply. It seems like you figured it out, but yes, it has to be called after advertising_init(), because it needs to know the advertising handle. This is new, as the Advertising handle came in SDK15, which is why it wasn't required before.

Best regards,

Edvin

RE: How to set sending power of NRF52810 with SDK15.0

liu — Thu, 10 May 2018 05:55:35 GMT

But i donn't know why sd_ble_gap_tx_power_set() must be behind of advertising_init(),because it is random in SDK8.1(s110) of NRF51822.

Liu

Beijing,China.

RE: How to set sending power of NRF52810 with SDK15.0

liu — Thu, 10 May 2018 03:20:22 GMT

Now,

I think i have found the reason why i failed.

advertising_init();
uint8_t err_adv=sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV,m_adv_handle,+4); //At this place;
advertising_start();

Yes,

err_adv=sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV,m_adv_handle,+4); //At this place;

this command must at the back of advertising_init();

and the return data is 0 (NRF_SUCCESS);