Increase TX beacon power

[Haroldo]

How can I increase the TX power on nRF5_SDK_15.3.0?

[Jared]

Hi.

You can use sd_ble_gap_tx_power_set() to increase the TX power if you're using the softdevice.

regards

Jared 

[Haroldo]

I am using s132 ble_app_beacon example but i don´t find sd_ble_gap_tx_power_set function.

Where are located this function?

Thanks

[Jared]

Hi,

It's included in the ble_gap.h file. You should be able to call it in the beacon example without adding anything. Are you getting build errors?

regards

Jared 

[Haroldo]

Good, i find the sd_ble_gap_tx_power_set() function in ble_app_proximity example and was very clarify to understand how this function is used.

But, when i add:
uint32_t err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, 4); 

I got this error:
'm_advertising' undeclared (first use in this function)

What i'm doing wrong? 

Thanks

[Jared]

Well, the error message sums it up: 

 

Haroldo said:

'm_advertising' undeclared (first use in this function)

Before you call sd_ble_gap_tx_power_set you need to have declared the m_advertising struct that you are passing as a parameter to the function.

regards

Jared 

[Haroldo]

I tryed declared the m_advertising struct without success...

I compared the advertising_start() function of ble_app_beacon and ble_app_proximity examples...

ble_app_proximity example:

/**@brief Function for starting advertising.
 */
static void advertising_start(bool erase_bonds)
{
    if (erase_bonds == true){
        delete_bonds();
        // Advertising is started by PM_EVT_PEERS_DELETE_SUCEEDED event.
    }
    else
    {
        uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);

        APP_ERROR_CHECK(err_code);
    }
}

The parameter used in ble_advertising_start is m_advertising.

ble_app_beacon example:

/**@brief Function for starting advertising.
 */
static void advertising_start(void)
{
    ret_code_t err_code;

    err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG);
    APP_ERROR_CHECK(err_code);

    err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    APP_ERROR_CHECK(err_code);
}

The parameter used in sd_ble_gap_adv_start is m_adv_handle.

So i changed the handle parameter of sd_ble_gap_tx_power_set function to m_adv_handle and works good!

uint32_t err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_adv_handle, 4); 

I don't know if what i did is correct but i can measure the difference on power TX...

Can i keep this modification?

What is the difference of ble_advertising_start and sd_ble_gap_adv_start?

PTS.: I also find in main() of ble_app_beacon example:

static uint8_t      m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET;

Thanks

[Jared]

Hi,

 It should be alright. It's effectively the same, ble_advertising_start() calls sd_ble_gap_adv_start(), see the definition of the function.

regards

Jared

[Haroldo]

Very good, Jared!

Many thanks to spend your time to help me!

Regards