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joan
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I'm not quite sure what you expect.

I'm not familiar with the A+.

Which gpios are you actually using? Is that photo a mirror image?

Gpios 0-8 have internal pull-ups to 3V3 of approximately 50k enabled at boot.

The other gpios on the expansion header have internal pull-downs to ground of approximately 50k enabled at boot.

Pins 3 and 5 have hard-wired 1k8 pull-ups to 3V3.

Anything under 1V at an input gpio may be seen as low (0). Anything over 2V at an input gpio may be seen as high (1).

joan
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