Initialization Code

This is the initialization code. It includes:
1. Initializing the display
2. Making sure the variables are preset.
3. Presetting the Mode from the manual switch.
4. Displaying a "welcome" message while the dial is re-indexing.
5. Initializing the internal sensor.
6. Initializating the external values memory.
(It may take up to a minute before the first message is received.)