Required for a university project, research on how to do the following task: 1) a sensor, which sends an RF signal to a notify 2) raspberry pi, that there has been change in the magnetic field.
Research the following components:
1) Sensor (Note the size of the components should be should be as small as possible)
>Link to a normally open magnetic switch, which can be purchased
> Rf Transmitter (MHz range) which can be legally used within australia
>Type of microcontroller that the switch and RF Transmitter will be attached to
> Recommendation on long life batteries which could be used
> Cost of the components should be below $25
2) Raspberry PI
>What components are required for receiving RF transmitter and instructions on how to set this up.
Just trying to get an understanding of whats required to build these components. The next project will actually be creating this, which will be a bigger project.