Sending an uint32_t value instead of an uint16_t one with ble_app_hrs

[Mahaliana]

Hi,

I would like to use the ble_app_hrs to send pressure values via the heart_rate_measurement_send function. Unfortunately, they are too long: around 105000 Pa (equals 1 1001 1010 0010 1000 in binary), so I think about changing the uint16_t into uint32_t.

What configurations are needed to perform please?

Here is the code:

static void heart_rate_meas_timeout_handler(void * p_context)
{
    static uint32_t cnt = 0;
    uint32_t        err_code;
    uint16_t        heart_rate;

    UNUSED_PARAMETER(p_context);

    heart_rate = (uint16_t)sensorsim_measure(&m_heart_rate_sim_state, &m_heart_rate_sim_cfg);

    cnt++;
    err_code = ble_hrs_heart_rate_measurement_send(&m_hrs, heart_rate);
    if ((err_code != NRF_SUCCESS) &&
        (err_code != NRF_ERROR_INVALID_STATE) &&
        (err_code != BLE_ERROR_NO_TX_BUFFERS) &&
        (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
        )
    {
        APP_ERROR_HANDLER(err_code);
    }

    // Disable RR Interval recording every third heart rate measurement.
    // NOTE: An application will normally not do this. It is done here just for testing generation
    //       of messages without RR Interval measurements.
    m_rr_interval_enabled = ((cnt % 3) != 0);
}

And I would like to change the “heart_rate = (uint16_t) sensorsim_measure(…);“ by “heart_rate = (uint32_t) 105000;” for example.

Regards, Mahaliana

[Mahaliana]

Hi, Thank you for your answer. I did not add the pressure characteristic because that seems a little complicated. For the moment, I just subtract 65536 (equals 1 0000 0000 0000 0000) from the calculated pressure value in order to have a uint16_t value, and I add this to the Hearth-rate measurement app in the nRF-Toolbox app.