Make the hue configurable

Fixes #3.

Signed-off-by: Gergely Nagy <algernon@keyboard.io>

README.md

@@ -27,10 +27,15 @@ void setup() {
 }
 ```
 
-## Plugin methods
+## Plugin properties
 
-The plugin provides the `LEDBreatheEffect` object, which has no public methods or
-properties, outside of those provided by all LED modes.
+The plugin provides the `LEDBreatheEffect` object, which has a single property:
+
+### `.hue`
+
+> The hue of the breathe effect.
+>
+> Defaults to 170.
 
 ## Dependencies
 

src/Kaleidoscope-LEDEffect-Breathe.cpp

@@ -2,7 +2,7 @@
 
 namespace kaleidoscope {
 void LEDBreatheEffect::update(void) {
-  cRGB color = breath_compute();
+  cRGB color = breath_compute(hue);
   ::LEDControl.set_all_leds_to(color);
 }
 }

src/Kaleidoscope-LEDEffect-Breathe.h

@@ -8,6 +8,8 @@ class LEDBreatheEffect : public LEDMode {
  public:
   LEDBreatheEffect(void) {}
 
+  uint8_t hue = 170;
+
  protected:
   void update(void) final;
 };