tweaked range a bit: led-max now 85°C, regulating-zone shifted by 5°C

firmware/cup.c

@@ -16,7 +16,7 @@
 
 #define LED_GREEN_TEMP 300
 //#define LED_RED_TEMP 1000
-#define LED_RED_TEMP 800
+#define LED_RED_TEMP 850
 
 #define TARGET_TEMP_MIN 300
 #define TARGET_TEMP_MAX 1050
@@ -134,13 +134,13 @@ ISR(PCINT0_vect)
 
 inline uint8_t control_output(void)
 {
-	if(temperature > target)
+	if(temperature - 50 > target)
 	{
 		return 0;
 	}
-	else if(temperature + 100 > target)
+	else if(temperature + 50 > target)
 	{
-		return (target - temperature) * 192 / 100;
+		return (target - temperature + 50) * 240 / 100;
 	}
 	else
 	{