How do I use sensors with a TFT?

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not programming, physically.

i have tft screen , connects directly arduino mega without additional shield.
https://www.itead.cc/itead-3-2-tft-lcd-touch-shield.html

but uses of pins except ioref, sda , scl (i don't know are)

so how supposed connect sensors board?

hi.

sda , scl form i2c bus.
you can connect 127 devices bus if remember correctly (maybe i'm mistaking other bus here usb).
anyway, can connect lot this.
look sensors use i2c, (sometimes called twi because of trademark issues).
there's lot of available.



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