ios connect nrf52832 failed.

[john.liu]

hi:

App <lightblue or nrf connect> (ipone6) connect nrf52832 failed .But using Android won't cause this problem.

Here is the log that failed to connect  lightblue:

<debug> nrf_ble_gatt: Requesting to update ATT MTU to 247 bytes on connection 0x0.
<debug> nrf_ble_gatt: Updating data length to 251 on connection 0x0.
<debug> btk_ble_bcs: bcs : BLE_GAP_EVT_CONNECTED
<info> app: Connected.
<debug> nrf_ble_gatt: ATT MTU updated to 185 bytes on connection 0x0 (response).
<info> app: Data len is set to 0xB6(182)
<debug> app: ATT MTU exchange completed. central 0xF7 peripheral 0xF7
<debug> nrf_ble_gatt: Data length updated to 27 on connection 0x0.
<debug> nrf_ble_gatt: max_rx_octets: 27
<debug> nrf_ble_gatt: max_tx_octets: 27
<debug> nrf_ble_gatt: max_rx_time: 328
<debug> nrf_ble_gatt: max_tx_time: 328
<debug> app: ATT MTU exchange completed. central 0xF7 peripheral 0xF7
<debug> btk_ble_bcs: bcs : BLE_GATTS_EVT_WRITE
<info> app: Fast advertising.
<info> app: Disconnected.

[Mttrinh]

Hi,

I tried your code and manage to connect with both my Android phone(Nexus 6 Android 7.1.1) and my iPhone X(iOS 12.1.4) using nRF Connect. Couldn't connect with the LightBlue app though. Could you try with another iPhone using nRF Connect and see if you can connect?

[john.liu]

Hi Mttrinh:

 iPhone connect with nrfConnect but disconnect after 30 seconds. 

I've revised it. But I don't know why.

Add

static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context){

.........

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);
break;

.........

}