/** * This code implements the RGB light mode (based on RGB + brightness) * for the Yeelight Bedside Lamp 2. */ #pragma once #include #include #include namespace esphome { namespace yeelight { namespace bs2 { struct RGB { float red; float green; float blue; }; struct RGBPoint { RGB low; RGB high; }; using RGBRing = std::array; using RGBCircle = std::array; /** * The following table contains GPIO PWM duty cycles as used for driving * the LEDs in the device in RGB mode. * * The base for this table are measurements against the original device * firmware, using the RGB color circle as used in Home Assistant as the * color space model. * * This circle has 7 colored rings around a white center point. * The outer ring, with the highest saturation, is numbered as 0. * The inner ring around the white center point is numbered as 6. * The white center point itself is numbered as 7, although this one * cannot really be called "a ring". * * For each ring, there are 24 color positions, starting at the * color red (0°), going around the circle clockwise via * green (120°) and blue (240°). * * For each color position, two duty cycle measurements are registered: * - one defining the duty cycles at 1% brightness * - one defining the duty cycles at 100% brightness * Duty cycles for in-between brightnesses can be derived from these * values by means of linear interpolation. */ static const RGBCircle rgb_circle_ {{ // Ring 0, min value RGB component value = 0 {{ {{ 0.8998, 0.9997, 0.9997 }, { 0.0000, 0.9997, 0.9997 }}, // 0° [255,0,0] (red) {{ 0.8727, 0.9404, 0.9682 }, { 0.0000, 0.6758, 0.9539 }}, // 15° [255,0,63] {{ 0.8727, 0.8967, 0.9677 }, { 0.0000, 0.2389, 0.9506 }}, // 30° [255,0,126] {{ 0.9030, 0.8727, 0.9682 }, { 0.3040, 0.0000, 0.9536 }}, // 45° [255,0,190] {{ 0.9270, 0.8727, 0.9685 }, { 0.5426, 0.0000, 0.9570 }}, // 60° [255,0,255] {{ 0.9404, 0.8727, 0.9687 }, { 0.6753, 0.0000, 0.9590 }}, // 75° [190,0,255] {{ 0.9491, 0.8727, 0.9687 }, { 0.7638, 0.0000, 0.9601 }}, // 90° [126,0,255] {{ 0.9539, 0.8727, 0.9689 }, { 0.8115, 0.0000, 0.9609 }}, // 105° [63,0,255] {{ 0.9997, 0.8998, 0.9997 }, { 0.9997, 0.0000, 0.9997 }}, // 120° [0,0,255] (green) {{ 0.9553, 0.8727, 0.9672 }, { 0.8264, 0.0000, 0.9452 }}, // 135° [0,63,255] {{ 0.9555, 0.8727, 0.9621 }, { 0.8266, 0.0000, 0.8937 }}, // 150° [0,126,255] {{ 0.9555, 0.8727, 0.9524 }, { 0.8273, 0.0000, 0.7964 }}, // 165° [0,190,255] {{ 0.9555, 0.8727, 0.9375 }, { 0.8285, 0.0000, 0.6469 }}, // 180° [0,255,255] {{ 0.9557, 0.8727, 0.9091 }, { 0.8301, 0.0000, 0.3648 }}, // 195° [0,255,190] {{ 0.9606, 0.9037, 0.8727 }, { 0.8782, 0.3091, 0.0000 }}, // 210° [0,255,126] {{ 0.9677, 0.9514, 0.8727 }, { 0.9486, 0.7856, 0.0000 }}, // 225° [0,255,63] {{ 0.9997, 0.9997, 0.8998 }, { 0.9997, 0.9997, 0.0000 }}, // 240° [0,255,0] (blue) {{ 0.9652, 0.9652, 0.8727 }, { 0.9245, 0.9252, 0.0000 }}, // 255° [63,255,0] {{ 0.9501, 0.9631, 0.8727 }, { 0.7746, 0.9029, 0.0000 }}, // 270° [126,255,0] {{ 0.9219, 0.9587, 0.8727 }, { 0.4919, 0.8601, 0.0000 }}, // 285° [190,255,0] {{ 0.8786, 0.9521, 0.8727 }, { 0.0584, 0.7946, 0.0000 }}, // 300° [255,255,0] {{ 0.8727, 0.9531, 0.9152 }, { 0.0000, 0.8022, 0.4250 }}, // 315° [255,190,0] {{ 0.8727, 0.9542, 0.9467 }, { 0.0000, 0.8145, 0.7889 }}, // 330° [255,126,0] {{ 0.8728, 0.9547, 0.9631 }, { 0.0000, 0.8207, 0.9044 }} // 345° [255,63,0] }}, // Ring 1, min value RGB component value = 35 {{ {{ 0.8727, 0.9499, 0.9660 }, { 0.0000, 0.7714, 0.9337 }}, // 0° [255,35,39] (red) {{ 0.8727, 0.9255, 0.9665 }, { 0.0000, 0.5268, 0.9365 }}, // 15° [255,35,90] {{ 0.8727, 0.8793, 0.9662 }, { 0.0000, 0.0664, 0.9345 }}, // 30° [255,35,145] {{ 0.9079, 0.8727, 0.9672 }, { 0.3515, 0.0000, 0.9455 }}, // 45° [255,35,200] {{ 0.9270, 0.8727, 0.9680 }, { 0.5429, 0.0000, 0.9519 }}, // 60° [255,35,255] {{ 0.9386, 0.8727, 0.9680 }, { 0.6593, 0.0000, 0.9534 }}, // 75° [200,35,255] {{ 0.9470, 0.8727, 0.9682 }, { 0.7433, 0.0000, 0.9546 }}, // 90° [145,35,255] {{ 0.9524, 0.8727, 0.9682 }, { 0.7961, 0.0000, 0.9552 }}, // 105° [90,35,255] {{ 0.9547, 0.8727, 0.9682 }, { 0.8212, 0.0000, 0.9555 }}, // 120° [39,35,255] (green) {{ 0.9547, 0.8727, 0.9655 }, { 0.8215, 0.0000, 0.9284 }}, // 135° [35,90,255] {{ 0.9550, 0.8727, 0.9600 }, { 0.8217, 0.0000, 0.8712 }}, // 150° [35,145,255] {{ 0.9550, 0.8727, 0.9506 }, { 0.8225, 0.0000, 0.7788 }}, // 165° [35,200,255] {{ 0.9551, 0.8727, 0.9375 }, { 0.8235, 0.0000, 0.6469 }}, // 180° [35,255,255] {{ 0.9547, 0.8727, 0.9150 }, { 0.8212, 0.0000, 0.4226 }}, // 195° [35,255,200] {{ 0.9560, 0.8828, 0.8727 }, { 0.8322, 0.1003, 0.0000 }}, // 210° [35,255,145] {{ 0.9639, 0.9357, 0.8727 }, { 0.9104, 0.6289, 0.0000 }}, // 225° [35,255,90] {{ 0.9675, 0.9610, 0.8727 }, { 0.9475, 0.8803, 0.0000 }}, // 240° [35,255,35] (blue) {{ 0.9596, 0.9597, 0.8727 }, { 0.8686, 0.8686, 0.0000 }}, // 255° [90,255,35] {{ 0.9430, 0.9570, 0.8727 }, { 0.7023, 0.8435, 0.0000 }}, // 270° [145,255,35] {{ 0.9160, 0.9530, 0.8727 }, { 0.4332, 0.8032, 0.0000 }}, // 285° [200,255,35] {{ 0.8780, 0.9472, 0.8728 }, { 0.0518, 0.7458, 0.0000 }}, // 300° [255,255,35] {{ 0.8727, 0.9477, 0.9099 }, { 0.0000, 0.7497, 0.3717 }}, // 315° [255,200,35] {{ 0.8727, 0.9490, 0.9396 }, { 0.0000, 0.7612, 0.6689 }}, // 330° [255,145,35] {{ 0.8727, 0.9496, 0.9580 }, { 0.0000, 0.7683, 0.8512 }} // 345° [255,90,35] }}, // Ring 2, min value RGB component value = 73 {{ {{ 0.8727, 0.9352, 0.9609 }, { 0.0000, 0.6244, 0.8822 }}, // 0° [255,73,76] (red) {{ 0.8727, 0.9035, 0.9616 }, { 0.0000, 0.3068, 0.8888 }}, // 15° [255,73,119] {{ 0.8847, 0.8727, 0.9629 }, { 0.1189, 0.0000, 0.9004 }}, // 30° [255,73,164] {{ 0.9121, 0.8727, 0.9650 }, { 0.3936, 0.0000, 0.9237 }}, // 45° [255,73,209] {{ 0.9270, 0.8727, 0.9665 }, { 0.5431, 0.0000, 0.9367 }}, // 60° [255,73,255] {{ 0.9370, 0.8727, 0.9665 }, { 0.6428, 0.0000, 0.9377 }}, // 75° [209,73,255] {{ 0.9445, 0.8727, 0.9665 }, { 0.7182, 0.0000, 0.9386 }}, // 90° [164,73,255] {{ 0.9499, 0.8727, 0.9667 }, { 0.7722, 0.0000, 0.9391 }}, // 105° [119,73,255] {{ 0.9534, 0.8727, 0.9667 }, { 0.8066, 0.0000, 0.9396 }}, // 120° [73,73,255] (green) {{ 0.9534, 0.8727, 0.9631 }, { 0.8068, 0.0000, 0.9024 }}, // 135° [73,119,255] {{ 0.9536, 0.8727, 0.9570 }, { 0.8073, 0.0000, 0.8435 }}, // 150° [73,164,255] {{ 0.9536, 0.8727, 0.9487 }, { 0.8081, 0.0000, 0.7602 }}, // 165° [73,209,255] {{ 0.9536, 0.8727, 0.9375 }, { 0.8088, 0.0000, 0.6474 }}, // 180° [73,255,255] {{ 0.9526, 0.8727, 0.9201 }, { 0.7990, 0.0000, 0.4736 }}, // 195° [73,255,209] {{ 0.9509, 0.8727, 0.8866 }, { 0.7804, 0.0000, 0.1383 }}, // 210° [73,255,164] {{ 0.9557, 0.9109, 0.8727 }, { 0.8291, 0.3813, 0.0000 }}, // 225° [73,255,119] {{ 0.9606, 0.9455, 0.8727 }, { 0.8798, 0.7268, 0.0000 }}, // 240° [73,255,73] (blue) {{ 0.9499, 0.9439, 0.8727 }, { 0.7714, 0.7107, 0.0000 }}, // 255° [119,255,73] {{ 0.9329, 0.9414, 0.8727 }, { 0.6005, 0.6855, 0.0000 }}, // 270° [164,255,73] {{ 0.9086, 0.9377, 0.8727 }, { 0.5381, 0.6496, 0.0000 }}, // 285° [209,255,73] {{ 0.8760, 0.9329, 0.8727 }, { 0.0314, 0.6013, 0.0000 }}, // 300° [255,255,73] {{ 0.8727, 0.9331, 0.9052 }, { 0.0000, 0.6027, 0.3248 }}, // 315° [255,209,73] {{ 0.8727, 0.9340, 0.9316 }, { 0.0000, 0.6130, 0.5876 }}, // 330° [255,164,73] {{ 0.8727, 0.9347, 0.9499 }, { 0.0000, 0.6202, 0.7717 }} // 345° [255,119,73] }}, // Ring 3, min value RGB component value = 109 {{ {{ 0.8727, 0.9114, 0.9526 }, { 0.0000, 0.3850, 0.7983 }}, // 0° [255,109,112] (red) {{ 0.8727, 0.8788, 0.9541 }, { 0.0000, 0.0615, 0.8125 }}, // 15° [255,109,145] {{ 0.8979, 0.8727, 0.9587 }, { 0.2526, 0.0000, 0.8586 }}, // 30° [255,109,182] {{ 0.9160, 0.8727, 0.9619 }, { 0.4311, 0.0000, 0.8906 }}, // 45° [255,109,218] {{ 0.9272, 0.8727, 0.9639 }, { 0.6254, 0.0000, 0.9111 }}, // 60° [255,109,255] {{ 0.9352, 0.8727, 0.9639 }, { 0.6254, 0.0000, 0.9111 }}, // 75° [218,109,255] {{ 0.9419, 0.8727, 0.9639 }, { 0.6909, 0.0000, 0.9116 }}, // 90° [182,109,255] {{ 0.9472, 0.8727, 0.9639 }, { 0.7438, 0.0000, 0.9119 }}, // 105° [145,109,255] {{ 0.9509, 0.8727, 0.9640 }, { 0.7814, 0.0000, 0.9121 }}, // 120° [109,109,255] (green) {{ 0.9509, 0.7827, 0.9599 }, { 0.7819, 0.0000, 0.7813 }}, // 135° [109,145,255] {{ 0.9509, 0.7827, 0.9541 }, { 0.7824, 0.0000, 0.8135 }}, // 150° [109,182,255] {{ 0.9511, 0.7827, 0.9467 }, { 0.7829, 0.0000, 0.7409 }}, // 165° [109,218,255] {{ 0.9512, 0.7827, 0.9376 }, { 0.7837, 0.0000, 0.6484 }}, // 180° [109,255,255] {{ 0.9494, 0.7827, 0.9245 }, { 0.7661, 0.0000, 0.5188 }}, // 195° [109,255,218] {{ 0.9465, 0.7827, 0.9035 }, { 0.7373, 0.0000, 0.3073 }}, // 210° [109,255,182] {{ 0.9435, 0.8810, 0.8727 }, { 0.7077, 0.0083, 0.0000 }}, // 225° [109,255,145] {{ 0.9491, 0.9190, 0.8727 }, { 0.7633, 0.4624, 0.0000 }}, // 240° [109,255,109] (blue) {{ 0.9372, 0.9171, 0.8727 }, { 0.6443, 0.4450, 0.0000 }}, // 255° [145,255,109] {{ 0.9204, 0.9147, 0.8727 }, { 0.4760, 0.4209, 0.0000 }}, // 270° [182,255,109] {{ 0.8991, 0.9119, 0.8727 }, { 0.2651, 0.3906, 0.0000 }}, // 285° [218,255,109] {{ 0.8727, 0.9081, 0.8730 }, { 0.0000, 0.3540, 0.0034 }}, // 300° [255,255,109] {{ 0.8727, 0.9094, 0.9016 }, { 0.0000, 0.3652, 0.2871 }}, // 315° [255,218,109] {{ 0.8727, 0.9101, 0.9236 }, { 0.0000, 0.3737, 0.5083 }}, // 330° [255,182,109] {{ 0.8727, 0.9109, 0.9411 }, { 0.0000, 0.3805, 0.6833 }} // 345° [255,145,109] }}, // Ring 4, min value RGB component value = 145 {{ {{ 0.8727, 0.8783, 0.9416 }, { 0.0000, 0.0566, 0.6879 }}, // 0° [255,145,147] (red) {{ 0.8916, 0.8727, 0.9484 }, { 0.1869, 0.0000, 0.7575 }}, // 15° [255,145,172] {{ 0.9081, 0.8727, 0.9539 }, { 0.3550, 0.0000, 0.8110 }}, // 30° [255,145,200] {{ 0.9191, 0.8727, 0.9572 }, { 0.4646, 0.0000, 0.8460 }}, // 45° [255,145,227] {{ 0.9272, 0.8727, 0.9600 }, { 0.5444, 0.0000, 0.8712 }}, // 60° [255,145,255] {{ 0.9336, 0.8727, 0.9600 }, { 0.6074, 0.0000, 0.8713 }}, // 75° [227,145,255] {{ 0.9387, 0.8727, 0.9600 }, { 0.6603, 0.0000, 0.8712 }}, // 90° [200,145,255] {{ 0.9435, 0.8727, 0.9600 }, { 0.7071, 0.0000, 0.8712 }}, // 105° [172,145,255] {{ 0.9472, 0.8727, 0.9600 }, { 0.7442, 0.0000, 0.8713 }}, // 120° [145,145,255] (green) {{ 0.9472, 0.8727, 0.9557 }, { 0.7446, 0.0000, 0.8311 }}, // 135° [145,172,255] {{ 0.9472, 0.8727, 0.9506 }, { 0.7451, 0.0000, 0.7798 }}, // 150° [145,200,255] {{ 0.9472, 0.8727, 0.9447 }, { 0.7456, 0.0000, 0.7208 }}, // 165° [145,227,255] {{ 0.9475, 0.8727, 0.9377 }, { 0.7463, 0.0000, 0.6498 }}, // 180° [145,255,255] {{ 0.9450, 0.8727, 0.9286 }, { 0.7228, 0.0000, 0.5588 }}, // 195° [145,255,227] {{ 0.9419, 0.8727, 0.9160 }, { 0.6904, 0.0000, 0.4319 }}, // 210° [145,255,200] {{ 0.9367, 0.8727, 0.8960 }, { 0.6393, 0.0000, 0.2328 }}, // 225° [145,255,172] {{ 0.9316, 0.8793, 0.8727 }, { 0.5890, 0.0666, 0.0000 }}, // 240° [145,255,145] (blue) {{ 0.9199, 0.8778, 0.8727 }, { 0.4716, 0.0505, 0.0000 }}, // 255° [172,255,145] {{ 0.9050, 0.8757, 0.8727 }, { 0.3227, 0.0003, 0.0000 }}, // 270° [200,255,145] {{ 0.8878, 0.8735, 0.8727 }, { 0.1513, 0.0064, 0.0000 }}, // 285° [227,255,145] {{ 0.8727, 0.8760, 0.8781 }, { 0.0000, 0.0316, 0.0528 }}, // 300° [255,255,145] {{ 0.8727, 0.8766, 0.8990 }, { 0.0000, 0.0398, 0.2607 }}, // 315° [255,227,145] {{ 0.8727, 0.8775, 0.9160 }, { 0.0000, 0.0465, 0.4316 }}, // 330° [255,200,145] {{ 0.8727, 0.8778, 0.9306 }, { 0.0000, 0.0523, 0.5798 }} // 345° [255,172,145] }}, // Ring 5, min value RGB component value = 181 {{ {{ 0.8980, 0.8727, 0.9391 }, { 0.5784, 0.4409, 0.8030 }}, // 0° [255,181,182] (red) {{ 0.9079, 0.8727, 0.9445 }, { 0.6330, 0.4409, 0.8327 }}, // 15° [255,181,199] {{ 0.9162, 0.8727, 0.9486 }, { 0.6774, 0.4409, 0.8556 }}, // 30° [255,181,218] {{ 0.9221, 0.8727, 0.9519 }, { 0.7104, 0.4409, 0.8725 }}, // 45° [255,181,236] {{ 0.9272, 0.8727, 0.9545 }, { 0.7382, 0.4409, 0.8866 }}, // 60° [255,181,255] {{ 0.9316, 0.8727, 0.9545 }, { 0.7618, 0.4409, 0.8863 }}, // 75° [236,181,255] {{ 0.9355, 0.8727, 0.9544 }, { 0.7827, 0.4409, 0.8861 }}, // 90° [218,181,255] {{ 0.9391, 0.8727, 0.9542 }, { 0.8025, 0.4409, 0.8859 }}, // 105° [199,181,255] {{ 0.9421, 0.8727, 0.9542 }, { 0.8191, 0.4409, 0.8859 }}, // 120° [181,181,255] (green) {{ 0.9421, 0.8727, 0.9509 }, { 0.8193, 0.4409, 0.8676 }}, // 135° [181,199,255] {{ 0.9421, 0.8727, 0.9470 }, { 0.8195, 0.4409, 0.8458 }}, // 150° [181,218,255] {{ 0.9424, 0.8727, 0.9429 }, { 0.8197, 0.4409, 0.8230 }}, // 165° [181,236,255] {{ 0.9424, 0.8727, 0.9380 }, { 0.8202, 0.4409, 0.7961 }}, // 180° [181,255,255] {{ 0.9399, 0.8727, 0.9321 }, { 0.8071, 0.4409, 0.7651 }}, // 195° [181,255,236] {{ 0.9370, 0.8727, 0.9252 }, { 0.7912, 0.4409, 0.7274 }}, // 210° [181,255,218] {{ 0.9331, 0.8727, 0.9160 }, { 0.7697, 0.4409, 0.6767 }}, // 225° [181,255,199] {{ 0.9282, 0.8727, 0.9045 }, { 0.7431, 0.4409, 0.6135 }}, // 240° [181,255,181] (blue) {{ 0.9221, 0.8727, 0.9050 }, { 0.7094, 0.4409, 0.6164 }}, // 255° [199,255,181] {{ 0.9147, 0.8727, 0.9057 }, { 0.6700, 0.4409, 0.6200 }}, // 270° [218,255,181] {{ 0.9074, 0.8727, 0.9062 }, { 0.6296, 0.4409, 0.6240 }}, // 285° [236,255,181] {{ 0.8988, 0.8727, 0.9072 }, { 0.5834, 0.4409, 0.6282 }}, // 300° [255,255,181] {{ 0.8986, 0.8727, 0.9166 }, { 0.5820, 0.4409, 0.6807 }}, // 315° [255,236,181] {{ 0.8985, 0.8727, 0.9250 }, { 0.5805, 0.4409, 0.7258 }}, // 330° [255,218,181] {{ 0.8981, 0.8727, 0.9329 }, { 0.5793, 0.4409, 0.7687 }} // 345° [255,199,181] }}, // Ring 6, min value RGB component value = 219 {{ {{ 0.9167, 0.8727, 0.9389 }, { 0.4399, 0.0000, 0.6606 }}, // 0° [255,219,219] (red) {{ 0.9199, 0.8727, 0.9414 }, { 0.4711, 0.0000, 0.6850 }}, // 15° [255,219,228] {{ 0.9226, 0.8727, 0.9432 }, { 0.4992, 0.0000, 0.7068 }}, // 30° [255,219,237] {{ 0.9252, 0.8727, 0.9452 }, { 0.5241, 0.0000, 0.7262 }}, // 45° [255,219,246] {{ 0.9275, 0.8727, 0.9472 }, { 0.5465, 0.0000, 0.7437 }}, // 60° [255,219,255] {{ 0.9294, 0.8727, 0.9470 }, { 0.5675, 0.0000, 0.7432 }}, // 75° [246,219,255] {{ 0.9316, 0.8727, 0.9470 }, { 0.5879, 0.0000, 0.7427 }}, // 90° [237,219,255] {{ 0.9335, 0.8727, 0.9470 }, { 0.6074, 0.0000, 0.7424 }}, // 105° [228,219,255] {{ 0.9352, 0.8727, 0.9470 }, { 0.6259, 0.0000, 0.7419 }}, // 120° [219,219,255] (green) {{ 0.9352, 0.8727, 0.9450 }, { 0.6262, 0.0000, 0.7217 }}, // 135° [219,228,255] {{ 0.9355, 0.8727, 0.9429 }, { 0.6264, 0.0000, 0.7002 }}, // 150° [219,237,255] {{ 0.9355, 0.8727, 0.9406 }, { 0.6269, 0.0000, 0.6777 }}, // 165° [219,246,255] {{ 0.9355, 0.8727, 0.9381 }, { 0.6272, 0.0000, 0.6540 }}, // 180° [219,255,255] {{ 0.9339, 0.8727, 0.9357 }, { 0.6111, 0.0000, 0.6291 }}, // 195° [219,255,246] {{ 0.9321, 0.8727, 0.9329 }, { 0.5929, 0.0000, 0.6013 }}, // 210° [219,255,237] {{ 0.9301, 0.8727, 0.9299 }, { 0.5729, 0.0000, 0.5703 }}, // 225° [219,255,228] {{ 0.9277, 0.8727, 0.9263 }, { 0.5503, 0.0000, 0.5354 }}, // 240° [219,255,219] (blue) {{ 0.9252, 0.8727, 0.9265 }, { 0.5249, 0.0000, 0.5368 }}, // 255° [228,255,219] {{ 0.9226, 0.8727, 0.9265 }, { 0.4985, 0.0000, 0.5383 }}, // 270° [237,255,219] {{ 0.9199, 0.8727, 0.9267 }, { 0.4711, 0.0000, 0.5399 }}, // 285° [246,255,219] {{ 0.9170, 0.8727, 0.9270 }, { 0.4426, 0.0000, 0.5414 }}, // 300° [255,255,219] {{ 0.9170, 0.8727, 0.9301 }, { 0.4419, 0.0000, 0.5734 }}, // 315° [255,246,219] {{ 0.9170, 0.8727, 0.9331 }, { 0.4411, 0.0000, 0.6039 }}, // 330° [255,237,219] {{ 0.9167, 0.8727, 0.9360 }, { 0.4406, 0.0000, 0.6330 }} // 345° [255,228,219] }} }}; class ColorRGBLight { public: float red = 0; float green = 0; float blue = 0; float white = 0; void set_color(float red, float green, float blue, float brightness, float state) { // Determine the ring level for the color. This is a value between // 0 and 7, determining in what ring of the RGB circle the requested // color resides. auto rgb_min = min(min(red, green), blue); auto level = 7.0f * rgb_min; // While the default color circle in Home Assistant presents only a // subset of colors, it is possible to request colors outside this // subset as well. Therefore, the ring level might contain a // fractional value instead of a plain integer. To accomodate for // this, interpolation will be done to get the final outputs. // Determine duty cycle measurements for the outer ring. auto level_a = floor(level); set_duty_cycles_(&rgbp_a_, level_a, red, green, blue, brightness, &rgb_a_); // Determine duty cycle measurements for the inner ring. auto level_b = ceil(level); set_duty_cycles_(&rgbp_b_, level_b, red, green, blue, brightness, &rgb_b_); // Almost there! We now have the correct duty cycles for the // two rings that we were looking at. In this last step, the // two values are interpolated based on the ring level. auto d = level - level_a; this->red = rgb_a_.red + d * (rgb_b_.red - rgb_a_.red); this->green = rgb_a_.green + d * (rgb_b_.green - rgb_a_.green); this->blue = rgb_a_.blue + d * (rgb_b_.blue - rgb_a_.blue); } protected: RGBPoint rgbp_a_; RGBPoint rgbp_b_; RGB rgb_a_; RGB rgb_b_; void set_duty_cycles_(RGBPoint *p, int ring_level, float r, float g, float b, float brightness, RGB *rgb) { // Ring level 7 = white light center. The duty cycles for this level // can be computed using a few basic functions. if (ring_level == 7) { rgb->red = 0.932101 - 0.383377 * brightness; rgb->green = 0.883185 - 0.881623 * brightness; rgb->blue = 0.94188 - 0.284498 * brightness; return; } // Other ring levels are more complex. Start by retrieving the // duty cycle measurement data for the ring at hand. auto ring = rgb_circle_[ring_level]; // Because we only have a subset of all colors in the RGB ring // available in the configuration table, some interpolation will // have to be done. // First, compute the position on the ring for the requested RGB // color. This is basically a hue representation of the requested // color. It is expressed as a number of degrees around the ring, // starting with red (at 0°). auto pos = ring_pos_(r, g, b) / 15.0f; // Since there are 24 measurements for each ring, each measurement // covers 360°/24 = 15°. Using that knowledge, the measurements to // use for interpolation can be picked from the ring data. auto pos_x = floor(pos); auto x = ring[pos_x]; auto pos_y = ceil(pos); auto y = ring[pos_y > 23 ? 0 : pos_y]; // Interpolate based on the ring position. auto d = pos - pos_x; p->low.red = x.low.red + d * (y.low.red - x.low.red); p->low.green = x.low.green + d * (y.low.green - x.low.green); p->low.blue = x.low.blue + d * (y.low.blue - x.low.blue); p->high.red = x.high.red + d * (y.high.red - x.high.red); p->high.green = x.high.green + d * (y.high.green - x.high.green); p->high.blue = x.high.blue + d * (y.high.blue - x.high.blue); // Interpolate based on brightness level. apply_brightness_(p, brightness, rgb); } /** * Returns the position on an RGB ring in degrees (0 - 359). */ float ring_pos_(float red, float green, float blue) { auto rgb_min = min(min(red, green), blue); auto rgb_max = max(max(red, green), blue); auto delta = rgb_max - rgb_min; float pos; if (delta == 0.0f) pos = 0.0f; else if (red == rgb_max) pos = 60.0f * fmod((green - blue) / delta, 6); else if (green == rgb_max) pos = 60.0f * ((blue - red) / delta + 2.0f); else pos = 60.0f * ((red - green) / delta + 4.0f); if (pos < 0) pos = pos + 360; return pos; } /** * Apply brightness interpolation to the duty cycle measurements. * We have the low (0.01) and high (1.00) brightness measurements * in the data. Brightness can be applied by means of linear * interpolation. */ void apply_brightness_(RGBPoint *p, float brightness, RGB *rgb) { auto d = brightness - 0.01f; rgb->red = p->low.red + d * (p->high.red - p->low.red); rgb->green = p->low.green + d * (p->high.green - p->low.green); rgb->blue = p->low.blue + d * (p->high.blue - p->low.blue); } }; } // namespace bs2 } // namespace yeelight } // namespace esphome