DS connected to pin d10 (and pin d10 also connected to lcd) - working.
so pin 10 is connected to both the LCD and the DS18B20. (this is not preferred but opens possibilities 
Seems that the LCD has somehow the proper resistor value / behavior
What is the function of the LCD pin connected to Arduino pin 10?
- data pin
- ENable pin
- RW pin
- ??
What type of communication does the LCD use?
- Serial
- SPI
- I2C
- parallel (4/8 datalines)
- other?