Hello Kanda San,
Sorry that I missed to update this thread.
Please call wiced_bt_gatt_configure_mtu API to configure MTU greater than 20 in hello_client_gatt_connection_up on hello_client project .
For example :
/* This function will be called on every connection establishment */
/* This function is invoked when connection is established */
wiced_bt_gatt_status_t hello_client_gatt_connection_up( wiced_bt_gatt_connection_status_t *p_conn_status )
{
uint8_t dev_role;
wiced_bt_dev_status_t status ;
if ( g_hello_client.num_connections > HELLO_CLIENT_MAX_CONNECTIONS )
{
WICED_BT_TRACE("g_hello_client max connect limit!\n");
wiced_bt_gatt_disconnect( p_conn_status->conn_id );
return WICED_BT_GATT_SUCCESS;
}
// Keep number of active connections
g_hello_client.num_connections++;
wiced_bt_dev_get_role( p_conn_status->bd_addr, &dev_role, BT_TRANSPORT_LE );
// Adding the peer info
hello_client_add_peer_info( p_conn_status->conn_id, p_conn_status->bd_addr, dev_role , p_conn_status->transport, p_conn_status->addr_type );
WICED_BT_TRACE( "hclient_connection_up Conn Id:%d Num conn:%d,Addr:<%B> role:%d\n ",
p_conn_status->conn_id, g_hello_client.num_connections, p_conn_status->bd_addr, dev_role );
// This application supports single connection to master (phone) and multiple connections to slaves (hello_sensors)
if ( dev_role == HCI_ROLE_MASTER )
{
WICED_BT_TRACE("Role master\r\n");
g_hello_client.conn_id = p_conn_status->conn_id;
status = wiced_bt_gatt_configure_mtu (p_conn_status->conn_id, 400);
WICED_BT_TRACE("Gatt MTU req send %d\r\n",status);
}
else // Connected as slave
{
// Update the connection handle to the master
g_hello_client.master_conn_id = p_conn_status->conn_id;
// Stop the advertisement
status = wiced_bt_start_advertisements( BTM_BLE_ADVERT_OFF, 0, NULL );
WICED_BT_TRACE(" [%s] start adv status %d \n", __FUNCTION__, status);
}
UNUSED_VARIABLE(status);
return WICED_BT_GATT_SUCCESS;
}
Note: Please don't send any write commands to enable notification immediately after sending wiced_bt_gatt_configure_mtu API.
You need to wait till MTU response and then only you should do next GATT operation.
In my case , I send enable notification on button press as below:
/* This function is invoked on button interrupt events */
void hello_client_interrupt_handler(void* user_data, uint8_t value )
{
wiced_result_t result;
int num_slaves = 0;
static uint32_t button_pushed_time = 0;
//WICED_BT_TRACE( "But1 %d, But2 %d, But3 %d \n", value & 0x01, ( value & 0x02 ) >> 1, ( value & 0x04 ) >> 2 );
WICED_BT_TRACE( "hello_client_interrupt_handler, app timer :%d\n", g_hello_client.app_timer_count );
if ( wiced_hal_gpio_get_pin_input_status(HELLO_CLIENT_GPIO_BUTTON) == HELLO_CLIENT_BUTTON_PRESSED_VALUE )
{
WICED_BT_TRACE( " Button pressed\n" );
button_pushed_time = g_hello_client.app_timer_count;
}
else if ( button_pushed_time != 0 )
{
WICED_BT_TRACE( " Button released " );
//Start the scan if the button is pressed for more than 5 seconds
if ( g_hello_client.app_timer_count - button_pushed_time > 5 )
{
num_slaves = hello_client_get_num_slaves();
WICED_BT_TRACE( " after more than 5s, connecting to next slave number %d\n", num_slaves+1 );
if ( num_slaves < HELLO_CLIENT_MAX_SLAVES )
{
start_scan = 1;
if( wiced_bt_ble_get_current_scan_state() == BTM_BLE_SCAN_TYPE_NONE )
{
result = wiced_bt_ble_scan( BTM_BLE_SCAN_TYPE_HIGH_DUTY, WICED_TRUE, hello_client_scan_result_cback );
WICED_BT_TRACE( "\nhello_client_interrupt_handler wiced_bt_ble_scan: %d\n", result );
}
}
else
{
WICED_BT_TRACE(" Scan Not Started. Connected to HELLO_CLIENT_MAX_SLAVES!! \n" );
}
}
else
{
WICED_BT_TRACE( " before less than 5s, sending notifications\n" );
hello_client_gatt_enable_notification( );
}
}
}
I tried and its working. Please test at your side.
Regards,
Anjana
