The arduino receives temperature in °C through serial.
The serial command to control it:
0,20; // for 20 °C
The first '0' is constant. The next number is the tempetature.
If the temperature is less than MIN_TEMP, the LEDs blink in blue. They blink in red if the temperature is more than MAX_TEMP.
For exemple :
80 °C
0,80;
-1 °C
0,-1;
30 °C
0,30;