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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
I think for this one - if I actually want to get more Pucks produced before I run out - I need to stick with the MAG3110. The LSM303C looks interesting - although it's not so good on power consumption. The magnetometer does provide readings more quickly, but in its low power mode it draws 5x more power than the MAG3110.