I am using a LDR to tell me whether there is light or not with an Arduino. My code is pretty simple, but instead of spamming "light light light light" I would like it to say "light" once, and then if the light goes off, for it to say "No light" once. code edited from "readanalogvoltage":
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}
// the loop routine runs over and over again forever:
void loop() {
// read the input on analog pin 0:
int sensorValue = analogRead(A0);
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
float voltage = sensorValue * (5.0 / 1023.0);
// print out the value you read:
if (voltage > 1.5)
{
Serial.print("Light");
Serial.println();
delay(5000);
}
if (voltage < 1.5)
{
Serial.print("No Light");
Serial.println();
delay(50);
}
}
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