notify cccd_handle

[kritis123]

Hi,

I am not sure about the functionality of notify_cccd_handle.I am sending data from central to peripheral  so the central should receive a notification from peripheral before forming a connection?If so will we enable notifications on central side with the function 

uint32_t ble_nus_c_tx_notif_enable(ble_nus_c_t * p_ble_nus_c)
{
VERIFY_PARAM_NOT_NULL(p_ble_nus_c);

if ( (p_ble_nus_c->conn_handle == BLE_CONN_HANDLE_INVALID)
||(p_ble_nus_c->handles.nus_rx_handle == BLE_GATT_HANDLE_INVALID) //nus_tx_cccd_handle
)
{
return NRF_ERROR_INVALID_STATE;
}
return cccd_configure(p_ble_nus_c->conn_handle,p_ble_nus_c->handles.nus_rx_handle, true);//nus_tx_cccd_handle
}

Am i looking at the right  handle p_ble_nus_c->handles.nus_rx_handle ?

[bjorn-spockeli]

HI Kriti, 

writing to a characteristics CCCD should be done after a connection has been established, not before. Yes, the function looks correct, just make sure to use the correct handle for the CCCD that you obtain during Service Discovery.

Best regards

Bjørn