[HELP] Getting light sensor to act as switch

Hi All,

I am working on a student project and need help writing an "if" statement that allows a light sensor to act as a switch that will then display text on an lcd monitor.


RGB backlight positive LCD 16x2 + extras - black on RGB

Light Sensor:

Adafruit TSL2591 High Dynamic Range Digital Light Sensor


If the light sensor detects a luminosity of 200 Lux, then display the word "Light On" on the LCD Monitor.



The LCD Monitor and the Light Sensor are both working independently on the same breadboard

you need to hold state

state = 0;

b = digitalRead(pin);

if (b == HIGH && state == 0) { state = 1; do something } if (b == LOW && state == 1) { state = 0; do something else }