Added lamp

components/xiaomi_bslamp2/sensor/slider_sensor.h

@@ -0,0 +1,71 @@
+#pragma once
+
+#include "../common.h"
+#include "../front_panel_hal.h"
+#include "esphome/components/sensor/sensor.h"
+#include <cmath>
+#include <algorithm>
+
+namespace esphome {
+namespace xiaomi {
+namespace bslamp2 {
+
+/**
+ * A sensor for the touch slider on the front panel of the
+ * Xiaomi Mijia Bedside Lamp 2.
+ *
+ * This sensor publishes the level at which the slider was touched, so it
+ * can be used to implement automations. Note that it does not represent
+ * the brightness of the LED lights (this is implemented by the light output
+ * component), nor the level as displayed by the slider using the front
+ * panel illumination (this is implemented by the slider output component).
+ */
+class XiaomiBslamp2SliderSensor : public sensor::Sensor, public Component {
+ public:
+  void set_parent(FrontPanelHAL *front_panel) { front_panel_ = front_panel; }
+  void set_range_from(float from) { range_from_ = from; }
+  void set_range_to(float to) { range_to_ = to; }
+
+  void setup() {
+    slope_ = (range_to_ - range_from_) / 19.0f;
+
+    front_panel_->add_on_event_callback([this](EVENT ev) {
+      if ((ev & FLAG_PART_MASK) == FLAG_PART_SLIDER) {
+        float level = (ev & FLAG_LEVEL_MASK) >> FLAG_LEVEL_SHIFT;
+
+        // Slider level 1 is really hard to touch. It is between
+        // the power button and the slider space, so it doesn't
+        // look like this one was ever meant to be used, or that
+        // the design was faulty on this. Therefore, level 1 is
+        // ignored. The resulting range of levels is 0-19.
+        float corrected_level = std::max(0.0f, level - 2.0f);
+
+        float final_level = range_from_ + (slope_ * corrected_level);
+
+        // Accomodate for rounding errors that might push the result
+        // value just past the "range to" value.
+        if (final_level > range_to_) {
+            final_level = range_to_;
+        }
+
+        this->publish_state(final_level);
+      }
+    });
+  }
+
+  void dump_config() {
+    ESP_LOGCONFIG(TAG, "Front panel slider sensor:");
+    ESP_LOGCONFIG(TAG, "  Range from: %f", range_from_);
+    ESP_LOGCONFIG(TAG, "  Range to: %f", range_to_);
+  }
+
+ protected:
+  FrontPanelHAL *front_panel_;
+  float range_from_;
+  float range_to_;
+  float slope_;
+};
+
+}  // namespace bslamp2
+}  // namespace xiaomi
+}  // namespace esphome