tedyapo / arduino-veml7700 Goto Github PK

kindly help on this veml7700 sensor. i am using your library with custom made veml7700 board, but it always gives wrong data output.

Hello - thanks for the great library. I noticed that, with the "out of the box"gain set at ALS_GAIN_x2, the sensor clips in direct sunlight to about 2.1 klx. The application note says:

Remark: to avoid possible saturation / overflow effects, application software should always start with low gain: ALS gain x 1/8 or gain 1/4. ALS gain x 2 shows the highest resolution and should only be used with very low illumination values, e.g. if sensor is placed below a very “dark” cover allowing only low light levels reaching the photodiode. (page 3)

Might be worth noting in the README that the device initialises for very low illumination, and to direct the user to the technical note and the setGain() command.

espressif/arduino-esp32#1657