Datasheet

adafruit_tsl2591.GAIN_MED - 25x gain (the default)

adafruit_tsl2591.GAIN_HIGH - 428x gain

adafruit_tsl2591.GAIN_MAX - 9876x gain

integration_time - Set the integration time of the sensor to a value of:

adafruit_tsl2591.INTEGRATIONTIME_100MS - 100ms (the default)

adafruit_tsl2591.INTEGRATIONTIME_200MS - 200ms

adafruit_tsl2591.INTEGRATIONTIME_300MS - 300ms

adafruit_tsl2591.INTEGRATIONTIME_400MS - 400ms

adafruit_tsl2591.INTEGRATIONTIME_500MS - 500ms

adafruit_tsl2591.INTEGRATIONTIME_600MS - 600ms

That's all there is to using the TSL2591 sensor with CircuitPython!

Below is a complete example that will print the light level every second. Save this as main.py on the board and view

the output in the REPL (be sure to modify the code to use bitbangio if necessary for your board!):

sensor.gain = adafruit_tsl2591.GAIN_LOW

sensor.integration_time = adafruit_tsl2591.INTEGRATIONTIME_200MS