OLED 4pin I2C (GND VDD SCK SDA) with Photon [SOLVED]

[steb]

Hi ScruffR,

thanks for your reply and the blog link.
I tried it with several combinations, but nothing worked.
The display is an GM009605 from here https://www.amazon.de/Zoll-serielle-OLED-Display-Modul-Arduino/dp/B00NHKM1C0/ref=sr_1_1?s=ce-de&ie=UTF8&qid=1487070756&sr=1-1&keywords=0%2C96+Zoll+I2C+IIC+SPI+serielle+128+x+64+OLED+LCD

But it has SCK instead of SCL. Here is a picture:

and here the test code:

Any ideas?

Thanks a lot
Stefan