No reconnect after LinkLoss

[Mathias]

Hi, I developed a sensory application which works together with the Master Control Panel (3.6.0.8331).

On the sensor side I am using the S110 (7.0.0-3.alpha) in combination with a bootloader. Since the electronics is sealed I am just able to update the application code over BLE, but I am not able to uptade to the final version of the S110 ( 7.0.0.).

I am having the problem, that after a received link loss, I am not able to reconnect to the device (bonded or not bonded) unless I reset the sensor.

What happens after a link loss (Timeout of CONN_SUP_TIMEOUT)? I can't find anything in the event handler, there is only an advertisment timeout described:

   case BLE_GAP_EVT_TIMEOUT:
            if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISEMENT)
            {                
   
                system_off_mode_enter();
            }
            break;

Should i add a system-reset if I receive link loss, but there is no entry (e.g. BLE_GAP_TIMEOUT_SRC_LINK_LOSS) in ble_gap.h.

The parameters are as follows:

#define MIN_CONN_INTERVAL                    MSEC_TO_UNITS(500, UNIT_1_25_MS) 
#define MAX_CONN_INTERVAL                    MSEC_TO_UNITS(4000, UNIT_1_25_MS)
#define SLAVE_LATENCY                        0 
#define CONN_SUP_TIMEOUT                     MSEC_TO_UNITS(16000, UNIT_10_MS)

I think I didn't had that much problems with the default connection parameters.

Thanks in advance!

Best regards,

Mathias

[Anjaly]

hello, I am also facing the same issue. I want to know whenever a link loss occurs. I too could not find any event which is triggered whenever a link loss happens. If you solved your problem, please help me too. Thanks in advance

[Nikolaus Wittenstein]

I believe BLE_GAP_EVT_TIMEOUT does not refer to link loss (see here). I think you detect it like this (untested):

case BLE_GAP_EVT_DISCONNECTED:
  m_conn_handle = BLE_CONN_HANDLE_INVALID;
            
  if (p_ble_evt->evt.gap_evt.params.disconnected.reason == BLE_HCI_CONNECTION_TIMEOUT)
  {
    ...
  }