Tip on reducing the IO pins usage.

donny681 / ESP32_CAMERA_QR

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Tip on reducing the IO pins usage. #1

Closed aguaviva closed 5 years ago

aguaviva commented 5 years ago

Given that QR codes are high contrast images, you might be able to get away using just 4bit images, or what is the same, use only 4 wires for the color bus. (I am hoping here the 8bit bus is only used for reading data, so I might be saying nonsenses :) )

donny681 commented 5 years ago

Because recognize qr require grey-scale map.