BLE Peripheral does not connect back after BLE central disconnects the first time

RE: BLE Peripheral does not connect back after BLE central disconnects the first time

SK — Thu, 12 Jul 2018 03:27:06 GMT

Hi,

Problem solved.

Setting system attributes while it connects back resolved the issue.

Thank you for this thread --> https://devzone.nordicsemi.com/f/nordic-q-a/3338/error-code-0x3401

And the bible --> https://devzone.nordicsemi.com/tutorials/b/bluetooth-low-energy/posts/ble-characteristics-a-beginners-tutorial.

Helped me understand more about the underlying workings of BLE 🙂

RE: BLE Peripheral does not connect back after BLE central disconnects the first time

SK — Thu, 12 Jul 2018 02:25:14 GMT

Hi,

Just an update here!

So while running the default BLE peripheral example, it runs perfectly fine. That is to say once i disconnect Central and try to connect again, peripheral and central connects.

Issue i am having is when i modify the BLE peripheral code.

I am using timer to make it go to sleep and once timer expires, it will send some random data to central. However, when i disconnect Central and then try to connect back again, it throws me with this error code: 0x3401.

Please see the code attached.

//inside main
while(true)
{
    if(timerExpires && bleConnected)
    {
        do
        {
            length=10;
            err_code = ble_nus_string_send(&m_nus, data, &length);
            if((err_code != NRF_ERROR_INVALID_STATE) && (err_code != NRF_ERROR_BUSY))
            {
                APP_ERROR_CHECK(err_code);
                timerExpires = false;
            }
        }
        
    }
    else if(bleConnected && !timerExpires)
    {
        //enter low power mode
    }
    else
    {
        //do nothing
    }
}

Error occurs when it tries to send data over BLE after re-connection.

I followed this page to get to know more --> https://devzone.nordicsemi.com/f/nordic-q-a/3338/error-code-0x3401

But, while debugging, it never comes to BLE_GATTS_EVT_SYS_ATTR_MISSING event.

Any suggestions on what could be the issue here?

RE: BLE Peripheral does not connect back after BLE central disconnects the first time

SK — Wed, 11 Jul 2018 02:21:28 GMT

Hi,

Any ideas pertaining to this issue?