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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.
@Gordon
Thanks for the suggestion! USB host is something that's probably a bit too difficult - while the F4-based Espruino boards are capable of it (but not at the same time as 'normal' USB), there's quite a lot of software work needed to make it work properly.
If someone were willing to do that software work, with Espruino WiFi you could just get one of those 'USB host' adaptors and plug it in, and electrically I think all the hardware would 'just work'.
Does the audio jack actually fit in the holes around there on the back of the board? Those holes are just for the prototype area so you could probably wire it in pretty easily - as you say, for some tasks being able to get audio out easily would be really cool.
I wonder how many people would use it, but we could potentially come up with a 'shim' design for the Pico (http://www.espruino.com/Shims) that had the SD card, battery charger, and an audio jack on it?