Movement Sensor

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hi guys,

i need simple complex project newbie me.

i need create 4 tiny sensors (as small possible, including battery), once moved send wireless signal box turn on led.

so exemple, if put sensor on door , door move, turn on green led on wireless box.

i guess need type of tiny wireless accelerometer. don't need know direction moves, nor velocity, nor speed, nothing. fact moved fine.

another idea had put magnet on door, , use magnetic sensor see if it's close or not. need 4 inches away don't know if work. remove whole wireless part.

any ideas?

.. door thing exemple.

what orientation requirements? sensor upright? kind of movements? drastic door swings or down vibration sensing?
affixed sensors or self contained?


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