Refactoring some of the i2c boilerplate (#1498)

* Refactoring some of the i2c boilerplate

* Default value

* Debug statement

src/modules/Telemetry/Sensor/DHTSensor.h

@@ -6,8 +6,11 @@ class DHTSensor : virtual public TelemetrySensor {
 private:
     DHT *dht = NULL;
 
+protected:
+    virtual void setup() override;
+
 public:
     DHTSensor();
     virtual int32_t runOnce() override;
-    virtual bool getMeasurement(Telemetry *measurement) override;
+    virtual bool getMetrics(Telemetry *measurement) override;
 };