The 0.40 firmware there looks to have some questionable strings in it, I've managed to find 0.60 from espressif official, will let you know how the flashing goes.
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.
The 0.40 firmware there looks to have some questionable strings in it, I've managed to find 0.60 from espressif official, will let you know how the flashing goes.