The red boards have a reset button grounding problem. They left off connection to ground on the bottom of the board. I have notified Chow He. You have to scrape some solder mask away from around one of the ground pins and solder bridge the pin to the ground plane. It’s not a major but it’s very inconvenient to have to do this to every board you buy. Other than that it’s an excellent board and works well. If you solder in the crystal, make sure you put something small under the case while soldering it so it doesn’t short something out (don’t solder it flat to the board). Would have given a higher rating if the unit was like the older blue boards.
