Concurrent Central/Peripheral UART

RE: Concurrent Central/Peripheral UART

kishor babu — Tue, 31 Jul 2018 11:35:19 GMT

RE: Concurrent Central/Peripheral UART

Jørgen Holmefjord — Mon, 30 Jul 2018 13:48:25 GMT

Please post your issue in a new question, you are moving outside the topic of this question.

RE: Concurrent Central/Peripheral UART

kishor babu — Mon, 30 Jul 2018 11:27:27 GMT

Hi Jorgen,

Now it is advertising and scanning.

But in peripheral it is able to connect to the central but not able to receive or send the data.

In central it is able to scan but when it is connected to the peripheral LED 2(which is used to mention that it is connected) is not glowing and instead the advertising LED 3 is turned off and i am not able to receive or send the data.

static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
{
    uint16_t conn_handle;
    uint16_t role;

    ble_conn_state_on_ble_evt(p_ble_evt);
    pm_on_ble_evt(p_ble_evt);

    // The connection handle should really be retrievable for any event type.
    conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
    role        = ble_conn_state_role(conn_handle);

    // Based on the role this device plays in the connection, dispatch to the right applications.
    if (role == BLE_GAP_ROLE_PERIPH)
    {
        // Manages peripheral LEDs.
			  printf("peripheral\r\n");
        on_ble_peripheral_evt(p_ble_evt);

        ble_advertising_on_ble_evt(p_ble_evt);
        ble_conn_params_on_ble_evt(p_ble_evt);

        // Dispatch to peripheral applications.
        ble_nus_on_ble_evt (&m_nus, p_ble_evt);
       
    }
    else if ((role == BLE_GAP_ROLE_CENTRAL) || (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_REPORT))
    {
		      printf("in central\r\n");    
         /** on_ble_central_evt will update the connection handles, so we want to execute it
         * after dispatching to the central applications upon disconnection. */
        if (p_ble_evt->header.evt_id != BLE_GAP_EVT_DISCONNECTED)
        {
            on_ble_central_evt(p_ble_evt);
        }
		  	//on_ble_central_evt(p_ble_evt);
				//bsp_btn_ble_on_ble_evt(p_ble_evt);
				ble_db_discovery_on_ble_evt(&m_ble_db_discovery, p_ble_evt);
        ble_nus_c_on_ble_evt(&m_ble_nus_c, p_ble_evt);
      
        // If the peer disconnected, we update the connection handles last.
        if (p_ble_evt->header.evt_id == BLE_GAP_EVT_DISCONNECTED)
        {
            on_ble_central_evt(p_ble_evt);
				
        }
		
				
    }
}

should i need to make any changes in the dispatcher function mentioned above?

RE: Concurrent Central/Peripheral UART

Jørgen Holmefjord — Thu, 26 Jul 2018 16:02:11 GMT

Try debugging the application. Most likely some error code is putting the application into the error handler.

RE: Concurrent Central/Peripheral UART

kishor babu — Thu, 26 Jul 2018 12:59:18 GMT

 */
static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
{	
	  uint16_t conn_handle_nb;
	  uint16_t role;
	  
	  ble_conn_state_on_ble_evt(p_ble_evt);
	
	  conn_handle_nb = p_ble_evt->evt.gap_evt.conn_handle;
    role        = ble_conn_state_role(conn_handle_nb);
	
	  SEGGER_RTT_printf(0,"EVT conn handle num %u!!\r\n", conn_handle_nb);
	
	 if(role != BLE_GAP_ROLE_INVALID)
		{
			    if (role == BLE_GAP_ROLE_PERIPH) //MAX
					{
							SEGGER_RTT_printf(0,"PERIPH\r\n");
							on_ble_peripheral_evt(p_ble_evt);
							ble_advertising_on_ble_evt(p_ble_evt);
							ble_conn_params_on_ble_evt(p_ble_evt);
						//dispatch to peripheral application
						ble_nus_on_ble_evt(&m_nus, p_ble_evt);
					}
					
				else	if (role == BLE_GAP_ROLE_CENTRAL)
					{
							SEGGER_RTT_printf(0,"CENTRAL\r\n");
							on_ble_central_evt(p_ble_evt);
							bsp_btn_ble_on_ble_evt(p_ble_evt);
							ble_db_discovery_on_ble_evt(&m_ble_db_discovery, p_ble_evt);
							ble_nus_c_on_ble_evt(&m_ble_nus_c,p_ble_evt);
					
					// If the peer disconnected, we update the connection handles last.
        if (p_ble_evt->header.evt_id == BLE_GAP_EVT_DISCONNECTED)
        {
            on_ble_central_evt(p_ble_evt);
        }
		  }
					
					
		else 
		{
					SEGGER_RTT_printf(0,"INVALID\r\n");
		}

}
		
}

Is this the change you suggested to Maxim?

RE: Concurrent Central/Peripheral UART

kishor babu — Thu, 26 Jul 2018 12:36:11 GMT

Hi Jorgen,

Sorry for late reply, I flashed the correct softdevice only but still it is not working.

RE: Concurrent Central/Peripheral UART

Jørgen Holmefjord — Wed, 25 Jul 2018 12:56:56 GMT

Did you flash the (correct) softdevice?

RE: Concurrent Central/Peripheral UART

kishor babu — Tue, 24 Jul 2018 11:45:29 GMT

Hi Jorgen,

I am also trying to merge the both uart demos.

i have downloaded the maxim code and added necessary files into it, it compiled all good and zero errors but it is not scanning or advertising.

I am using nrf52832 board and sdk 12.3.

could you please help me in this?

RE: Concurrent Central/Peripheral UART

kishor babu — Mon, 23 Jul 2018 06:55:52 GMT

Hi Maxim,

I am also working on same sort of thing where i need implement UART service as central and peripheral at a time

could u send the working code for this?

Thanks in advance,

Kishor

RE: Concurrent Central/Peripheral UART

Maxim — Mon, 20 Feb 2017 07:20:41 GMT

Thanks a lot for your help Jørgen, it works perfectly with this ! And for the peripheral function we must add ble_nus_on_ble_evt(&m_nus, p_ble_evt); on the dispatch peripheral to retreive the messages.

RE: Concurrent Central/Peripheral UART

Jørgen Holmefjord — Fri, 17 Feb 2017 15:28:40 GMT

Hi,

It does not look like you are handling received advertising reports in your application.

When your central receives an advertising packet, the role will be set to BLE_GAP_ROLE_INVALID, but the event ID will indicate BLE_GAP_EVT_ADV_REPORT.

You should dispatch such events to the on_ble_central_evt() handler. Have a look at for instance the BLE Relay Example (concurrent central/peripheral) for more details about how this is done.

Best regards,

Jørgen