I have problems with RGB reader value and with de calculate LUX and Color temperature. about adafruit_apds9960 HOT 2 OPEN

Looking at the equation, there are a few things missing.

1. The Gain is not used in the equation for Lux, it likely should be (maybe just divide the computation by the gain?)
2. Overflow on any channel (visual, red, green and blue) are not checked for. This is a function of aTime (not values for 219 and 246 for atime do not reflect the equation 1025 * cycles)

Regarding actual measurements, I cannot comment on these.

The equation (calculateLux) should change to something like (with the visual channel added, maybe it shouldn't be):

// where gain is 1, 4, 16, 64
// where atime is the actual setting
max_count = 1025*(256-atime);

if(max_count >= 65535)
{
    max_count = 65535;
}

if(visual >= max_count || r >= max_count || g >= max_count || b >= max_count)
{
    return "OverFlow"
}
Lux = ((-0.32466f * r) + (1.57837f * g) + (-0.73191f * b)) / gain;

from adafruit_apds9960.

The ALS integration time is not taken into account too. This will also lead to incorrect values if the application does not scale down the RGB values correctly before calling the calculateLux or calculateColorTemperature method. Even with the default value of 10 for the iTimeMS parameter in the begin method, the RGB count values are already integrated over 3 ADC conversions.

from adafruit_apds9960.