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Adding 'xy' color response for Philips Hue emulation

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Stephan Hadinger 2019-04-18 23:11:59 +02:00
parent 99a4556bab
commit 5732efa27c
1 changed files with 34 additions and 0 deletions
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34
sonoff/xplg_wemohue.ino
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@ -468,6 +468,7 @@ const char HUE_DESCRIPTION_XML[] PROGMEM =
"\r\n";
const char HUE_LIGHTS_STATUS_JSON1[] PROGMEM =
"{\"on\":{state},"
"\"xy\":[{x}, {y}],"
"{light_status}"
"\"alert\":\"none\","
"\"effect\":\"none\","
@ -566,12 +567,42 @@ void HueConfig(String *path)
bool g_gotct = false;
#define FORCE_RANGE(x, min, max) x < min ? min : (x > max ? max : x)
void RgbToXy(uint8_t i_r, uint8_t i_g, uint8_t i_b, float *r_x, float *r_y)
{
float x = 0.31271f;
float y = 0.32902f;
if (i_r + i_b + i_g > 0) {
float r = (float)i_r / 255.0f;
float g = (float)i_g / 255.0f;
float b = (float)i_b / 255.0f;
// https://gist.github.com/popcorn245/30afa0f98eea1c2fd34d
r = (r > 0.04045f) ? pow((r + 0.055f) / (1.0f + 0.055f), 2.4f) : (r / 12.92f);
g = (g > 0.04045f) ? pow((g + 0.055f) / (1.0f + 0.055f), 2.4f) : (g / 12.92f);
b = (b > 0.04045f) ? pow((b + 0.055f) / (1.0f + 0.055f), 2.4f) : (b / 12.92f);
float X = r * 0.649926f + g * 0.103455f + b * 0.197109f;
float Y = r * 0.234327f + g * 0.743075f + b * 0.022598f;
float Z = r * 0.000000f + g * 0.053077f + b * 1.035763f;
x = X / (X + Y + Z);
y = Y / (X + Y + Z);
}
if (r_x) *r_x = x;
if (r_y) *r_y = y;
//*bri = Y;
}
void HueLightStatus1(uint8_t device, String *response)
{
float hue = 0;
float sat = 0;
float bri = 254;
uint16_t ct = 0;
// default xy color to white D65, https://en.wikipedia.org/wiki/Illuminant_D65
float x, y;
String light_status = "";
// force ct mode for LST_COLDWARM
@ -595,6 +626,9 @@ void HueLightStatus1(uint8_t device, String *response)
// ct = 0 is non valid, so we put 284 as default value (medium white)
light_status += "\"ct\":" + String( (ct < 100) ? 284 : ct) + ",";
}
RgbToXy(Settings.light_color[0], Settings.light_color[1], Settings.light_color[2], &x, &y);
response->replace("{x}", String(x));
response->replace("{y}", String(y));
response->replace("{light_status}", light_status);
response->replace("{m}", g_gotct?"ct":"hs");
}