Cool, didn't know that. But like are they physically accessible? I don't think you can use the USB port as GPIO. Maybe some unused pins on the SOC itself, but that means opening up the phone and probably removing the shielding/heatsink...

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amelius 2 hours ago | parent [-]

You can attach some photodiodes to your screen to control things. And use the camera/mic for input.

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cowlevel 2 hours ago | parent [-]

Now that's a funny idea. But it's true!

	▲	amelius an hour ago \| parent [-]
		I think you can attach a keyboard to a phone over USB, and in theory it can provide both input and output (you can control the LEDs from the host computer). That would be a more convenient route, I suppose.