You are reading a single comment by @Gordon and its replies.
Click here to read the full conversation.
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.
@Gordon
What kind of problems? I'm quite interested in the F401 so I'd like to know what you encountered.
Maybe you could try connecting a USB-TTL connector to USART1 (or USART2 if you based the config on the F4Discovery board). While trying the F429discovery I found that USB wasn't working, but it was still communicating fine over serial.