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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.
@Ollie
It seems that anything might go with regard to color-coding the wires on these sensors!
I've revisited the ebay listing for the sensors I purchased, and the advert states in the tech specifications: yellow is ground, green is data!! It's the only advert I can see like this, all the others have yellow as data. I'm reluctant to even believe it - thinking it a mistake - but it would explain everything!
I shall test tonight - if you hear me laughing maniacally you'll know green was data.