Users struggling to trigger pairing mode with triple-tap

[microbit-carlos]

We've had some reports of users struggling to trigger pairing mode using triple-pair.

We have one known DAPLink issue when on battery power:

• On battery power, the RESET button stops working after repeatedly pressing RESET (e.g. triple-tap) microbit-foundation/DAPLink#21

But we don't think it's likely to only be that issue.

The current theory right now is that maybe the time between resets is too low at 500 ms:

codal-microbit-v2/model/MicroBit.cpp

Lines 426 to 436 in a3492c4

	void MicroBit::periodicCallback()
	{
	// Zero our reset_count once the micro:bit has been running for half a second
	static int timeout = 500 / (SCHEDULER_TICK_PERIOD_US/1000);
	if (timeout-- == 0 && microbit_no_init_memory_region.resetClickCount != 0)
	{
	microbit_no_init_memory_region.resetClickCount = 0;
	status &= ~DEVICE_COMPONENT_STATUS_SYSTEM_TICK;
	}
	}

We need to check with users first to identify the problem they are experiencing, which could result in an increase of this time.