I’m getting to grips with my Core and have noticed some strange behaviour when I power it up (from USB).
From cold the core doesn’t go through the usual LED sequence at start up. Instead it pulses fast white a few times, then briefly sticks at solid white, before repeating the cycle ad-infinitum. The blue LED (on D7) flashes briefly too each time the sequence repeats. It looks like the Core is failing to start up correctly, maybe rebooting / resetting they trying again.
This behaviour is repeatable no matter what USB port / USB power supply I use. I’ve also tried a selection of USB cables.
The only solution I have found is to warm up the Core under my desk lamp for a few seconds (or in the exhaust of my sweating laptop!). After a quick warm up it starts up fairly normally, but generally gets stuck flashing green. A further reset gets it fully running & subsequent restarts, either via the reset button, or power cycle are normal.
It’s not particularly cold in my study - say 20C. Are there any known issues relating to startup & temperature, or do I maybe have an iffy Core?