I am using an A-Star 32U4 Micro in a battery powered project which, among other operations, reads a sensor every 15 minutes. To keep the power usage as low as possible I am using the LowPower library written by Rocket Screan Electronics. The A-Star goes into low power mode OK but never comes out of it. Also, I can’t upload another program after this happens without activating the bootloader via the reset line. If I don’t activate a low power mode the board works fine.
What is strange is that the same code I’m works fine on other 32U4 boards such as an Aruino Leonardo.
I’ve tried this on two different A-Star 32U4 Micro boards with the same result.
I suspect the bootloader may be the problem but I’m not sure how to verify my suspicions.