If I disconnect and reconnect while receiving data through Notify, an error occurs.

Question

Hello 
 I am using nrf52832 and ble_app_uart of SDK v17.0. 
 I am sending data to the app every second through the notify function. If I try to disconnect and reconnect Bluetooth while sending data like this, the connection will fail and stop working. 
 I tested sending data using the ble_app_uart example. Similarly, enabling notify will cause an error when reconnecting Bluetooth. (If notify is disabled, there is no problem reconnecting.) 
 I couldn't find any problems with debugging. 
 This is the code I used to send the data. Could there be a problem here? 
 // Enter main loop.
 for (;;)
 {
 uint32_t err_code;

 idle_state_handle();

 //Send to app 1 and 2 test
 int test1 = 1;
 char test1_value[20]; 
 sprintf(test1_value, "%d", test1); 
 uint16_t length_test1 = strlen(test1_value); 

 err_code = ble_nus_data_send(&m_nus, &test1_value, &length_test1, m_conn_handle);
 if ((err_code != NRF_ERROR_INVALID_STATE) &&
 (err_code != NRF_ERROR_RESOURCES) &&
 (err_code != NRF_ERROR_NOT_FOUND))
 {
 APP_ERROR_CHECK(err_code);
 } 

 int test2 = 2;
 char test2_value[20]; 
 sprintf(test2_value, "%d", test2); 
 uint16_t length_test2 = strlen(test2_value); 

 err_code = ble_nus_data_send(&m_nus, &test2_value, &length_test2, m_conn_handle);
 if ((err_code != NRF_ERROR_INVALID_STATE) &&
 (err_code != NRF_ERROR_RESOURCES) &&
 (err_code != NRF_ERROR_NOT_FOUND))
 {
 APP_ERROR_CHECK(err_code);
 } 

 nrf_delay_ms(500);
 } 
 
 Is there anything known about this problem? Thank you.

Vidar Berg · Accepted Answer

Hello, 
 Could you please try ignore the BLE_ERROR_GATTS_SYS_ATTR_MISSING error like you have done with NRF_ERROR_INVALID_STATE, NRF_ERROR_RESOURCES and NRF_ERROR_NOT_FOUND? sd_ble_gatts_hvx() may return this error if it is called before the client has enabled notifications.

If I disconnect and reconnect while receiving data through Notify, an error occurs.

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