lcd.print((char)223); // degree
The degree symbol (as in 27°C) ...
º how about alt+0186 º ºXºXºXºgoogle is so amazing these days, I just googled "How to type degree symbol on PC" and bingo
I assume \r sends only a 13, but does \n send only a 10, or both 10 + 13?
Depends on what is doing the sending, on what operating system.
Next day Google will push books ad to you that features a whole chapter on "How to type degree symbol on PC"
How about this one: Serial.print("\n");