I used the free version of Segger J-Flash. It complains about the dongle being faulty but still works.
@ConorONeill 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.
I used the free version of Segger J-Flash. It complains about the dongle being faulty but still works.