@DrAzzy: I wasn't familiar with the AT25, as I'm still new to the microcontroller world. You shocked me a bit (I thought I may have re-invented a wheel that already existed in the Espruino universe). But to my relief, those seem to be two different wheels. From what I see in the datasheet and AT25.js, the protocol is simpler, the handling of the CS pin is different, commands are different, and the AT25 has only 6 instructions while the W25Q has over 30.
Also chip sizes are different. Most AT25 are in the kilobyte range and W25Q in the megabyte range.
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