i've tried it but nothing on the lcd again,

i think it has to do with the osc commands and there is the problem.

i put a 4mhz ceramic with two legs, i idid also tried the ceramic 4mhz with 3 legs. Nothing on the screen.

i'm sad that cannot complete it.

thanks a lot for your help! am i doing something wrong with the schematic? Do i need anything else?

The code from the elektor works, but i dont have the ds1820. And it is on the screen xxx.xx

But i dont understand why it does not work with your code.