abhas
/
esphome-xiaomi_bslamp2


								#pragma once


								#include "esphome.h"


								#define CONSTANT_BRIGHTNESS true


								// The lamp circuitry does not support having RGB and white

								// channels active at the same time. Therefore, color interlock

								// must be enabled.

								#define COLOR_INTERLOCK true


								// Same range as supported by the original Yeelight firmware.

								#define HOME_ASSISTANT_MIRED_MIN 153

								#define HOME_ASSISTANT_MIRED_MAX 588


								#define TAG "yeelight_bs2"


								//#define YEELIGHT_DEBUG_LOG

								//#define TRANSITION_TO_OFF_BUGFIX


								namespace esphome

								{

								    namespace rgbww

								    {


								        class YeelightBedsideLampV2LightOutput : public Component, public LightOutput

								        {

								        public:

								            YeelightBedsideLampV2LightOutput(

								                FloatOutput *r, FloatOutput *g, FloatOutput *b, FloatOutput *w,

								                esphome::gpio::GPIOBinaryOutput *m1, esphome::gpio::GPIOBinaryOutput *m2) : red_(r), green_(g), blue_(b), white_(w), master1_(m1), master2_(m2) {}


								            LightTraits get_traits() override

								            {

								                auto traits = LightTraits();

								                traits.set_supports_rgb(true);

								                traits.set_supports_color_temperature(true);

								                traits.set_supports_brightness(true);

								                traits.set_supports_rgb_white_value(false);

								                traits.set_supports_color_interlock(COLOR_INTERLOCK);

								                traits.set_min_mireds(HOME_ASSISTANT_MIRED_MIN);

								                traits.set_max_mireds(HOME_ASSISTANT_MIRED_MAX);

								                return traits;

								            }


								            void write_state(LightState *state) override

								            {

								                auto values = state->current_values;


								//#ifdef YEELIGHT_DEBUG_LOG

								                ESP_LOGD(TAG, "B = State %f, RGB %f %f %f, BRI %f, TEMP %f",

								                         values.get_state(),

								                         values.get_red(), values.get_green(), values.get_blue(),

								                         values.get_brightness(), values.get_color_temperature());

								//#endif


								                // Power down the light when its state is 'off'.

								                if (values.get_state() == 0)

								                {

								                    this->turn_off_();

								                    return;

								                }


								                auto brightness = values.get_brightness();


								#ifdef TRANSITION_TO_OFF_BUGFIX

								                // What seems to be a bug in ESPHome transitioning: when turning on

								                // the device, the brightness is scaled along with the state (which

								                // runs from 0 to 1), but when turning off the device, the brightness

								                // is kept the same while the state goes down from 1 to 0. As a result

								                // when turning off the lamp with a transition time of 1s, the light

								                // stays on for 1s and then turn itself off abruptly.

								                // For turning off, I implemented this hack here to make the

								                // transition work better.

								                if (previous_state_ > values.get_state()) {

								                    brightness = values.get_state() * brightness;

								                }

								                previous_state_ = values.get_state();

								#endif


								                // Leave it to the default tooling to figure out the basics.

								                // Because of the color interlocking, there are two possible outcomes:

								                // - red, green, blue zero -> the light is in color temperature mode

								                // - cwhite, wwhite zero -> the light is in RGB mode

								                float red, green, blue, cwhite, wwhite;

								                state->current_values_as_rgbww(

								                    &red, &green, &blue, &cwhite, &wwhite,

								                    CONSTANT_BRIGHTNESS, COLOR_INTERLOCK);


								                if (cwhite > 0 || wwhite > 0)

								                {

								                    this->turn_on_in_color_temperature_mode_(

								                        values.get_color_temperature(), brightness);

								                }

								                else

								                {

								                    // The RGB mode does not use the RGB values as determined by

								                    // current_values_as_rgbww(). The device has LED driving circuitry

								                    // that takes care of the required brightness curve while ramping up

								                    // the brightness. Therefore, the actual RGB values are passed here.

								                    this->turn_on_in_rgb_mode_(

								                        values.get_red(), values.get_green(), values.get_blue(), brightness);

								                }

								            }


								        private:

								            FloatOutput *red_;

								            FloatOutput *green_;

								            FloatOutput *blue_;

								            FloatOutput *white_;

								            esphome::gpio::GPIOBinaryOutput *master1_;

								            esphome::gpio::GPIOBinaryOutput *master2_;

								            // Used for a bug hack in turn_on_in_rgb_mode_()

								            float previous_state_ = 1;


								            void turn_off_()

								            {

								                // Using set_level() calls for the RGB GPIOs, and not

								                // turn_off(), because turn_off() causes some unwanted

								                // flashing when powering off at low brightness.

								                red_->set_level(1);

								                green_->set_level(1);

								                blue_->set_level(1);

								                white_->turn_off();

								                master1_->turn_off();

								                master2_->turn_off();

								            }


								            void turn_on_in_rgb_mode_(float red, float green, float blue, float brightness)

								            {

								#ifdef YEELIGHT_DEBUG_LOG

								                ESP_LOGD(TAG, "Activate RGB %f, %f, %f, BRIGHTNESS %f", red, green, blue, brightness);

								#endif


								                // The brightness must be at least 3/100 to light up the LEDs.

								                if (brightness < 0.03f)

								                    brightness = 0.03f;


								                // Apply brightness.

								                red = red * brightness;

								                green = green * brightness;

								                blue = blue * brightness;


								                // Inverse the signal. The LEDs in the lamp's circuit are brighter

								                // when the pwm levels on the GPIO pins are lower.

								                red = 1.0f - red;

								                green = 1.0f - green;

								                blue = 1.0f - blue;


								#ifdef YEELIGHT_DEBUG_LOG

								                ESP_LOGD(TAG, "New LED state : RGBW %f, %f, %f", red, green, blue);

								#endif


								                // Drive the LEDs.

								                red_->set_level(red);

								                green_->set_level(green);

								                blue_->set_level(blue);

								                white_->turn_off();

								                master1_->turn_on();

								                master2_->turn_on();

								            }


								            void turn_on_in_color_temperature_mode_(float temperature, float brightness)

								            {

								#ifdef YEELIGHT_DEBUG_LOG

								                ESP_LOGD(TAG, "Activate TEMPERATURE %f, BRIGHTNESS %f", temperature, brightness);

								#endif


								                // Empirically determined during programming the temperature GPIO output

								                // code from below, by checking how far my outputs were off from the

								                // original lamp firmeware's outputs. This scaler is used for correcting

								                // my output towards the original output.

								                float scaler;


								                float red = 1.0;

								                float green = 1.0;

								                float blue = 1.0;

								                float white = 1.0;


								                // Temperature band 370 - 588

								                if (temperature <= HOME_ASSISTANT_MIRED_MAX && temperature >= 371)

								                {

								                    scaler = 3.23f;


								                    float start = 371;

								                    float end = 588;

								                    float band = end - start;


								                    float red_volt = 2.86f * (1.0f - brightness);

								                    red = red_volt / scaler;


								                    float green_1 = 2.90f + (temperature - start) * (2.97f - 2.90f) / band;

								                    float green_100 = 0.45f + (temperature - start) * (1.13f - 0.45f) / band;

								                    float green_volt = green_1 + brightness * (green_100 - green_1);

								                    green = green_volt / scaler;


								                    float white_1 = 0.28f - (temperature - start) * (0.28f - 0.19f) / band;

								                    float white_100 = 1.07f - (temperature - start) * (1.07f - 0.22f) / band;

								                    float white_volt = white_1 + brightness * (white_100 - white_1);

								                    white = white_volt / scaler;

								                }

								                // Temperature band 334 - 370

								                else if (temperature >= 334)

								                {

								                    scaler = 3.23f;


								                    float red_volt = (1.0f - brightness) * 2.86f;

								                    red = red_volt / scaler;


								                    float green_volt = 2.9f - brightness * (2.9f - 0.45f);

								                    green = green_volt / scaler;


								                    float white_volt = 0.28f + brightness * (1.07f - 0.28f);

								                    white = white_volt / scaler;

								                }

								                // Temperature band 313 - 333

								                //

								                // The light becomes noticably brighter when moving from temperature 334 to

								                // temperature 333. There's a little jump in the lighting output here.

								                // Possibly this is a switch from warm to cold lighting as imposed by the

								                // LED circuitry, making this unavoidable. However, it would be interesting

								                // to see if we can smoothen this out.

								                // BTW: This behavior is in sync with the original firmware.

								                else if (temperature >= 313)

								                {

								                    scaler = 3.23f;


								                    float red_volt = 2.89f - brightness * (2.89f - 0.32f);

								                    red = red_volt / scaler;


								                    float green_volt = 2.96f - brightness * (2.96f - 1.03f);

								                    green = green_volt / scaler;


								                    float white_volt = 0.42f + brightness * (2.43f - 0.42f);

								                    float scaler_white = 3.45f;

								                    white = white_volt / scaler_white;

								                }

								                // Temperature band 251 - 312

								                else if (temperature >= 251)

								                {

								                    scaler = 3.48f;


								                    float white_correction = 1.061;

								                    float white_volt = 0.5f + brightness * (3.28f * white_correction - 0.5f);

								                    white = white_volt / scaler;

								                }

								                // Temperature band 223 - 250

								                else if (temperature >= 223)

								                {

								                    scaler = 3.25f;


								                    float green_volt = 2.94f - brightness * (2.94f - 0.88f);

								                    green = green_volt / scaler;


								                    float blue_volt = 3.02f - brightness * (3.02f - 1.59f);

								                    blue = blue_volt / scaler;


								                    float white_correction = 1.024f;

								                    float white_volt = 0.42f + brightness * (2.51f * white_correction - 0.42f);

								                    float scaler_white = 3.36f;

								                    white = white_volt / scaler_white;

								                }

								                // Temperature band 153 - 222

								                else if (temperature >= HOME_ASSISTANT_MIRED_MIN)

								                {

								                    float start = 153;

								                    float end = 222;

								                    float band = end - start;


								                    scaler = 3.23f;


								                    float green_volt = 2.86f - brightness * 2.86f;

								                    green = green_volt / scaler;


								                    float blue_1 = 2.92f + (temperature - start) * (2.97f - 2.92f) / band;

								                    float blue_100 = 0.62f + (temperature - start) * (1.17f - 0.62f) / band;

								                    float blue_volt = blue_1 - brightness * (blue_1 - blue_100);

								                    blue = blue_volt / scaler;


								                    float white_1 = 0.28f + (temperature - start) * (0.37f - 0.28f) / band;

								                    float white_100 = 1.1f + (temperature - start) * (2.0f - 1.1f) / band;

								                    float white_volt = white_1 + brightness * (white_100 - white_1);

								                    float scaler_white = 3.27f;

								                    white = white_volt / scaler_white;

								                }


								#ifdef YEELIGHT_DEBUG_LOG

								                ESP_LOGD(TAG, "New LED state : RGBW %f, %f, %f, %f", red, green, blue, white);

								#endif


								                red_->set_level(red);

								                green_->set_level(green);

								                blue_->set_level(blue);

								                white_->set_level(white);

								                master2_->turn_on();

								                master1_->turn_on();

								            }

								        };


								    } // namespace rgbww

								} // namespace esphome