int ble_gattc_exchange_mtu( uint16_t conn_handle, ble_gatt_mtu_fn *cb, void *cb_arg )
Initiates GATT procedure: Exchange MTU.
| Parameter | Description |
|---|---|
| conn_handle | The connection over which to execute the procedure. |
| cb | The function to call to report procedure status updates; null for no callback. |
| cb_arg | The optional argument to pass to the callback function. |
| Value | Condition |
|---|---|
| 0 | Success. |
| Core return code | Unexpected error. |