Hi again Martin!
Some more info maybe it can help
I have made some reserch on the web and I have downloaded a project from here with a temperature DS18b20:
https://www.youtube.com/watch?v=-nECx4DOE84
First I follow his project step by step. Get the lib. and all. Follow his connection, power 3.3V and connect the datapin directly to the output, 5V. Damaged the display, it doesn´t work. I search some more and see different opinions how to connect the datapin. I try with resistor divider, no luck. then I try with only 2k7 resistor in serie only on data pin, then it work and is very nice and stable.
Subsequently I perform test with FC8 again, but

no luck Of course I could use the others projects, but prefer to make my own in FC
One more thing, the name of the pin on the display fit, but not on the delete pin on the display, is this in FC8 CHIP SELECT?
Br Jorgen