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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
What kind of sensor is this? There are several designs.
You'll probably need a voltage divider to get the 0~3.3v or 0~5v output of sensor into the 0~1v range of the ADC - however, this may have already been done for you on the lolin board - some of the ESP8266 development boards do this.