how can I get the gatt remaining send buf size

[johnny HU]

I have multiple packets to send over GATT, NRF_SDH_BLE_GATT_MAX_MTU_SIZE = 160, how can I get the remaining buf size,thanks

[Sigurd]

Hi,

From the sd_ble_gatts_hvx() documention:

The number of Handle Value Notifications that can be queued is configured by ble_gatts_conn_cfg_t::hvn_tx_queue_size When the queue is full, the function call will return NRF_ERROR_RESOURCES. A BLE_GATTS_EVT_HVN_TX_COMPLETE event will be issued as soon as the transmission of the notification is complete.The application can keep track of the available queue element count for notifications by following the procedure below:

• Store initial queue element count in a variable.
• Decrement the variable, which stores the currently available queue element count, by one when a call to this function returns NRF_SUCCESS.
• Increment the variable, which stores the current available queue element count, by the count variable in BLE_GATTS_EVT_HVN_TX_COMPLETE event.