Phone disconnect nrf51822 immediately

[pikachu]

Hi guys

I want connect nrf51822 (Raytac MDBT40) by my phone(HTC battery one android 4.4.2).

I use softdevice 130(ver.2.0.0) and SDK 11 demo code under KEIL ARM 5. (Nordic Semiconductor\nRF5_SDK_11.0.0_89a8197\examples\ble_peripheral\ble_app_uart\pca10028\s130\arm5_no_packs)

I don't need to use UART now, so I comment out uart_init(); and buttons_leds_init(&erase_bonds); in main function.

When process starting running, I can find bluetooth device on my phone.

But I can't connect it.(I have try setting->bluetooth and nRF UART.)

I check static void on_ble_evt(ble_evt_t * p_ble_evt).

It try to connect but disconnect immediately.

static void on_ble_evt(ble_evt_t * p_ble_evt)
{
	uint32_t                         err_code;
	
	switch (p_ble_evt->header.evt_id)
	{
		case BLE_GAP_EVT_CONNECTED:
			err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
			APP_ERROR_CHECK(err_code);
			m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
SEGGER_RTT_WriteString(0, "CONNECTED \n");
			break;
			
		case BLE_GAP_EVT_DISCONNECTED:
			err_code = bsp_indication_set(BSP_INDICATE_IDLE);
			APP_ERROR_CHECK(err_code);
			m_conn_handle = BLE_CONN_HANDLE_INVALID;
SEGGER_RTT_WriteString(0, "uccu \n");
			break;

		case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
			// Pairing not supported
			err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
			APP_ERROR_CHECK(err_code);
SEGGER_RTT_WriteString(0, "PARAMS_REQUEST \n");
			break;

		case BLE_GATTS_EVT_SYS_ATTR_MISSING:
			// No system attributes have been stored.
			err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
			APP_ERROR_CHECK(err_code);
SEGGER_RTT_WriteString(0, "ATTR_MISSING \n");
			break;

		default:
			// No implementation needed.
			break;
	}
}

The result as following.

 0> sd_ble_enable: RAM START at 0x20001FE8
 0> Loop Start!
 0> CONNECTED 
 0> PARAMS_REQUEST 
 0> uccu 

If need more information.

Please tell me, thanks.

[Petter Myhre]

Have deleted bond information on the chip and the phone? What is the disconnect reason that you get with the disconnected event? What app are you using on the phone? nRF Connect? If not, try with that. Could you do a sniffer trace? You can use the nRF Sniffer.

[pikachu]

Hi Petter

I try it after reset chip power and delete phone pairing information.

Where or what value may I check reason in the code?

I use "nRF Uart".

I will try "nRF Sniffer" as soon as possible.

Thanks.

[Petter Myhre]

Resetting the chip will not delete the bond information, you have to clear the flash.

You can find the reason in p_ble_evt->evt.gap_evt.params.disconnected.reason when you get the BLE_GAP_EVT_DISCONNECTED event.

[pikachu]

Hi Petter

I have clear the flash and try again.

I get 0x13(BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION) after entering case BLE_GAP_EVT_DISCONNECTED event.

[Petter Myhre]

Ok. A sniffer trace would be very helpful. I can also try to reproduce here, if you share your complete project.