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The sensor algorithm people worked hard to make sure that the "compass sensor" is not affected by stray ambient magnetic field. If you want to see magnetic field data, use the magnetic field sensor instead. The common way to know that the device is subjected to an external magnetic disturbance is by comparing the magnetic sensor data with motion sensors ...


Android compass works using phones sensors and gps not magnet or any kind of compass integered inside your phone. So, it is not possible to make any kind of deflection using magnets.


I'm not an expert in this field, but reading the explanation of infrared thermometer on Wikipedia, I don't think general Android pdevice has sufficient component to do the reading. Here's the explanation from Wikipedia: By knowing the amount of infrared energy emitted by the object and its emissivity, the object's temperature can often be determined.... ...


I know the question was about the Nexus, but from Samsung's website, "Hall Sensor: Recognizes whether the cover is open or closed."

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