(channel 1) from the value of the physical sensor that combines visible and infrared (channel 0). The visible value is obtained by subtracting the reading of the physical infrared sensor However, the sensor readings here also provide the simple “visible” value separately. The two physical sensors measure “visible and infrared” (channel 0) and “infrared” (channel 1), respectively. The other sensors are unitless readings from the device’s on-board ADCs for the physical sensors. (For information about the difference between radiometric and photometric measurements, see the references.) Only one of them, calculated_lux, is a true lux value, and even that is a bit subjective. This Wikipedia article has a table of some lux values for comparison. ![]() You may be saturating that sensor and need to reduce the gain. On the other hand, if you get ADC readings of 65,535 for either physical sensor, Use a higher gain value when measuring less intense light sources. If light levels change dramatically this may cause the next reading to saturate,Īfter which the gain will adjust down and subsequent readings will be in range. It achieves that large range by having a configurable gain value.įor many applications, you can use AUTO gain to have the ESP select a suitable gain setting based on ![]() The sensor claims a dynamic range of 600 million to 1 with an effective maximum of 88000 lux. TSL2591 Ambient Light Sensor on a breakout board. (for example, Adafruit, CQRobot, Waveshare). The TSL2591 device is available on breakout boards from a few vendors The tsl2591 sensor platform allows you to use the AMS TSL2591 ambient light sensor with ESPHome.Ĭommunication with the device is over I☬, which must be present in your configuration.
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