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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.
@allObjects
From the pic, the relays module is a 1xu - which means, (usually) the middle contact is the feed and the outer contacts are switched from on and off in (relays) unpowered mode - input connected to low or ground - to off and on in (relays) powered mode - input connected to high or 5V. Some mudules have a 3 pronged jumper to reverse that. Btw, what is on the print on the other side of the module - starting with HL- ?