Man this is embarrassing again, but 4.5V is not enough. I was able to get 5.2V or so and now it works.
@mattw started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Man this is embarrassing again, but 4.5V is not enough. I was able to get 5.2V or so and now it works.