Update to IAQI colormap

Claire.ino

@@ -581,6 +581,30 @@ static int colormap(float x) {
   return y;
 }
 
+float colormapIaqi(void)
+{
+    float x = 0.0f;
+    float iaqi = iaqSensor.iaq;
+
+    if (iaqi <= 50.0f) {
+      x = 1.0f; // Excellent
+    } else if (iaqi <= 100.0f) {
+      x = 2.0f; // Good
+    } else if (iaqi <= 150.0f) {
+      x = 4.0f; // Lightly polluted
+    } else if (iaqi <= 200.0f) {
+      x = 7.0f; // Moderately polluted
+    } else if (iaqi <= 250.0f) {
+      x = 9.0f; // Heavily polluted
+    } else if (iaqi <= 350.0f) {
+      x = 10.0f; // Severely polluted
+    } else {
+      x = 11.0f; // Extremely polluted
+    }
+
+    return colormap(x);
+}
+
 static float buienradarMap(float x) {
   // Input: rain intensity (mm/h)
   // Output: floating point number which can be mapped on color scale
@@ -814,9 +838,7 @@ static void updateLeds(void) {
   ledsSetPixelColor(IAQI_LED, r, g, b);
 
   if (hw_variant == HW_PROTO_V1) {
-    float x = iaqSensor.iaq / 40;
-    x = x < 1.0f ? 1.0f : x;
-    color = colormap(x);
+    color = colormapIaqi();
   
     r = (color & 0xFF0000) >> 16;
     g = (color & 0x00FF00) >> 8;