I'm afraid Espruino is now too large to fit in flash alongside the bootloader so you'll have to overwrite it. All you need to do that is a USB-TTL converter though... http://www.espruino.com/Serial+Bootloader
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.
Hi,
I'm afraid Espruino is now too large to fit in flash alongside the bootloader so you'll have to overwrite it. All you need to do that is a USB-TTL converter though... http://www.espruino.com/Serial+Bootloader
hope that helps! I'll update the website.