Commercially made Bluetooth switches can be purchased from a variety of companies who specialize in assistive technology but the prices can run from $180 up to $500 or more. We can use our maker skills, the power of Arduino compatible processors, and a few parts from the Adafruit store and build our own custom device for a fraction of that cost. Not only can a maker-built device save considerable money, if you have access to a 3D printer, laser cutter, or CNC devices you can create a device especially suited to the particular needs of the user. You have the flexibility that may not be available from a commercially built device.
https://learn.adafruit.com/ios-switch-control-using-ble?view=all
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