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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
0x03 | 0x40just means an 'OR' - it's the same as writing0x43. It's just configuring the sensor to output at 100hz with a filter on it to stop it being too noisy (and you have to do that while the sensor is turned off).