I am looking for the simplest sensor ever: read the state of a switch and transalte that into a 0/1 data on an I2C bus using the smallest, simplest and cheapest chip...
Thanks for helping
You could use the PCA9564, that is a parallel bus to I2C bus controller.
Here you could have more information about the product.
Parallel bus to I2C-bus controller|NXP
I hope this information could be helpful.
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