BLE - Try to disconnect during sending notification

[mtimm]

Hello,

My config:
- nRF SDK v17.1.0
- nRF SoftDevice S140 7.2.0
- FreeRTOS Kernel v10.0.0 (Amazon.com)

My project used BLE connection with custom service (based on NUS). I am using nitifications for sendind custom data between my peripheral (server) device and central (client) device.

I have got issue when I disconnect BLE connection (disconnect triggered from peripheral or from central device) when notification are enabled.
When I want to make new connection one more time, connection is being established but app is being crashed in function sd_ble_gatts_hvx(0 (error x3401).

It looks like after disconnection, notifications are still being enabled and my custom service would like to send them after new connection is being established. I suppose it couse the issue. How can I disable notification on periheral device after disconnection?

My disconnection code:

/* Disconnect only when connection is established */
if (bleConnHandle != BLE_CONN_HANDLE_INVALID)
{
    errCode = sd_ble_gap_disconnect(bleConnHandle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(errCode);
} 

[Amanda Hsieh]

Hi, 

Error 0x3401 is BLE_ERROR_GATTS_SYS_ATTR_MISSING which means System attributes missing, use sd_ble_gatts_sys_attr_set to set them to a known value. See this and this. 

Also, have a look at this case. 

-Amanda