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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.
@allObjects
@LeebWeeb
What's discussed so far is static stuff that happens once on upload...
Espruino can though also use unused space in the flash for non-volatile storage, populated with write and then read back with read. Works perfect when way more read than writes... but I would not exactly call this as RAM, even though rewriteable at runtime.
Rewrite has its issues. Inherent to the technology used, a rewrite can only happen after an erase, and the number of erase and rewrite cycles are limited. Espruino components to write to and read from "Storage" - as it is called - makes it very acceptable and super easy to use: it takes care of the erase as well as applies wear leveling to get maximum life time out of flash uses as r/w Storage.
Checkout out
require("Storage").xyz()` - the Storage 'class' at https://www.espruino.com/Reference#Storage ( and as well https://www.espruino.com/Reference#StorageFile )...I hope this helps you to conceive the app you have in mind to fit...