io expander class ok , adc not working

RotaxMonitor/lib/led/led.h

@@ -50,6 +50,7 @@ public:
     RGBled(const uint8_t pin = 48);
     ~RGBled();
 
+    void setBrightness(const float b);
     void setStatus(const LedStatus s);
     const LedStatus getSatus(void);
 
@@ -59,5 +60,6 @@ private:
 private:
     LedStatus m_status = LedStatus::IDLE;
     std::mutex m_mutex;
+    float m_brightness;
     const uint8_t m_led;
 };