Bosch claims its 2-by-2.5-by-.95 millimeter package (right) has a 65 percent smaller footprint than the last generation.
Designed for use as an altimeter smart enough to tell smartphone users what floor they are on in the mall, Bosch's BMP280 measures a tiny 2-by-2.5 millimeters, but gives an accurate reading of altitude to within a resolution of 10 centimeters...
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