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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.
@mhoneywill
That relay module might be a bit small to control a pump. Its rated at 2A and a pump could well be rated more than that. Also the pump being an inductive load means that you might be better off with a relay based board.