Arduino Wire.h library: how to communicate with an LCD?
SOLVED!

I forgot to write beginTransmission(). Here's my code:

#include &lt;Wire.h&gt;

void setup() {
  Wire.begin(0x63);
}

void loop() {    
  Wire.beginTransmission(0x63);
  Wire.write(byte(0x00));
  Wire.write("Temperatur:");
  Wire.endTransmission();
}