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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.
@HughB
I imagine you will be hard pressed to wear the flash out by writing to it too many times. It might be possible if you deliberately wrote an app to do this millions of times.
There is 8MB of storage so plenty of space for a few variables in a json string.
BTW Javascript is a lot easier to work with than Python or C. If you are familiar with C then most of the block structure, loops, for, while etc will be known to you already. Worth looking at W3schools for basic exmaples of Javascript one concept at a time.