NRF_ERROR_RESOURCES occurred when the connection is disconnected

[EarlBread]

Dear

First of all, I am so sorry because of my english skill.

I got NRF_ERROR_RESOURCES when the connection between NRF Module and mobile device is disconnected  due to the reduced signal strength because of long distance.

However, if I disconnect the connection by sending the disconnection command from mobile device, it works well without any errors.

I used app_timer_start api to send data for notification every 1s as following,

err_code = app_timer_start(m_bms_measurement1_timer_id, BMS_MEASUREMENT1_TIMER_INTERVAL, NULL);
APP_ERROR_CHECK(err_code);

I already set NRF_SDH_BLE_GAP_EVENT_LENGTH as 100 and used BLE_GATTS_EVT_HVN_TX_COMPLETE.

But I had same result as before.

Thanks in advance.

[EarlBread]

Thanks for quick response.

I solved NRF_ERROR_NO_MEM problem with your recommend.

I did the implementation as followings,

increasing hvn_tx_queue_size = 27 with code in ble_stack_init function.

increasing NRF_SDH_BLE_GAP_EVENT_LENGTH 235 in sdk_config.h

didn't use  boolean ble_tx_completed in notification function for testing.

uint32_t ble_cus_bms_measurement1_update(ble_cus_t * p_cus, struct bms_measurement1_s *m_bms_measurement, uint16_t conn_handle)
{
    ble_gatts_hvx_params_t params;
    uint16_t len = sizeof(struct bms_measurement1_s);

    memset(&params, 0, sizeof(params));
    params.type   = BLE_GATT_HVX_NOTIFICATION;
    params.handle = p_cus->bms_measurement1_char_handles.value_handle;
    params.p_data = m_bms_measurement;
    params.p_len  = &len;

    //if(ble_tx_completed == true)
    //{
    //  ble_tx_completed = false;
    //  return sd_ble_gatts_hvx(conn_handle, &params);
    //}else return 0;
    return sd_ble_gatts_hvx(conn_handle, &params);
}

But I still have NRF_ERROR_RESOURCES.

Thanks.

[Karl Ylvisaker]

Hello,

EarlBread said:

Thanks for quick response.

No problem at all, I am happy to help!

EarlBread said:

I solved NRF_ERROR_NO_MEM problem with your recommend.

Great, I am glad to hear that it resolved your issue.

EarlBread said:

I did the implementation as followings,

increasing hvn_tx_queue_size = 27 with code in ble_stack_init function.

increasing NRF_SDH_BLE_GAP_EVENT_LENGTH 235 in sdk_config.h

didn't use  boolean ble_tx_completed in notification function for testing.

EarlBread said:

But I still have NRF_ERROR_RESOURCES.

Thank you for clarifying. If you are still getting NRF_ERROR_RESOURCES with a queue size of 27 we will need to take a look at how often notifications are queued for sending.
How many notifications do you intend to send each connection event? You're current connection interval is between 400 and 650 ms - how many notifications do you expect to send in this period, and how often is the ble_cus_bms_measurement1_update function called in your program?

Best regards,
Karl