ble_event_id 0x1b

[sfujimoto]

hello, Starting nRF 52832 (s 132), leaving idle, after 3 minutes, ble_event_id 0x1b will occur, then BLE communication will be impossible. When ble_event_id is 0x1b, how should we deal with it? (ble_evt_t->header.evt_id)

thank you

[Sigurd]

Hi,

The default advertising time is 180 seconds(3 minutes):

#define APP_ADV_TIMEOUT_IN_SECONDS      180

If you have not connected to a central after 180 seconds, you get the advertising timeout event(BLE_GAP_EVT_TIMEOUT == 0x1B), and the default behavior after that is that the chip goes into sleep mode to save power.

How to deal with this? Either

1. Connect with a central within 180 seconds, or
2. Trigger a wake-up event to exit sleep-mode (e.g. press one of the buttons on the DK) to do another 180 seconds of advertising, or
3. Do unlimited advertising(no timeout after 180 seconds, see this thread).