How to configure multiple notifications per connection event

Question

Hi, 
 
 I'm trying to improve throughput by increasing the notification buffer number to 6. (SD132, V 5.0.0, SDK14.2) 
 I tried to follow the sequence charts as well as use sd_ble_cfg_set() in ble_stack_init() but it does not seem to work. 
 ble_cfg_t ble_cfg;
	ble_cfg.conn_cfg.params.gatts_conn_cfg.hvn_tx_queue_size = 6;	
	APP_ERROR_CHECK(sd_ble_cfg_set(APP_BLE_CONN_CFG_TAG, &ble_cfg, ram_start));
 
 What is the correct way to do it? 
 
 Thanks

Andy · Answer

You don't really have to increase the queue size. Just queue the notifications using sd_ble_gatts_hvx() until you fill the queue. The soft device will take care of sending as many notifications as possible on each connection event.

Andy · Answer

Mm it seems you're right. However, if you queue a new notification as soon as you get the tx complete event, you shouldn't have any issues. 
 In any case what you're doing is alright, but you need to change APP_BLE_CONN_CFG_TAG to BLE_CONN_CFG_GATTS.