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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.
@DrAzzy
Aaah, no SPI? well then, better use an AT24! (AT24 is I2C, AT25 is SPI).
Does the SD card work over software SPI?
ESP8266 - there are a few other board layouts for this making the rounds, at similar prices to the others. Some of these have castellated pads, which might make them a better choice for our purposes.
Re: Castellations - I certainly see the appeal, I think this is a good idea - it would make it just so easy to put the Espruino Pico onto a larger board. I can't see any issues, except maybe a slightly higher risk of accidental shorts. Can this be done without making the board larger?