Long distance data transfer with I2C


Hello friends,

I can not make long-distance data transmission by making the system master / slave with I2C.

I have ADCs that have a certain adrese. He works on short distances.

Even when I pulled up, I could work at 5 meters.

I need to support me at least 30 meters.

I2C bus buffer / repeater samples (PCA9515, PCA9511, PCA9517, etc.) I searched but could not find the market in Turkey. It will take too long to wait.

Alternatively, which way do I have to follow and what method can I do?

Thanks for your help.