Hello gilshutz,
Thanks for answer !
I made my connexions as the pucture below, for the moment I only connected "blue LEDs" and DS3231.
No wire above 25cm are used.
For the i2C scanner, I downloaded library in arduino IDE, but I don't know how to use it, sorry, I am really new in this world, I am currently trying to learn a to perform the I2C scanner using google search.
thanks!
