各位前輩好:
我想藉光敏電阻來控制LED 開或關,先在void setup ()透過光敏電阻取得當時環境的sensorValue當作THRESHOLD值
再由void loop() 去比較這時的sensorValue 與THRESHOLD的值來去控制LED,寫了下列程式碼,但TRESHOLD仍會跳動.
可否請各位前輩指點迷津,感謝
#define analogInPin 0
#define THRESHOLD sensorValue
int sensorValue=0;
void setup() {
Serial.begin(9600);
sensorValue=0.7*sensorValue+0.3*analogRead(analogInPin);
pinMode(13,OUTPUT);
}
void loop() {
int r=sensorValue;
sensorValue=0.7*sensorValue+0.3*analogRead(analogInPin);
delay(1000);
if(r>THRESHOLD){
digitalWrite(13,LOW);
}
else{
digitalWrite(13,HIGH);
}
Serial.print("THRESHOLD = ");
Serial.print(THRESHOLD);
Serial.print(",r ");
Serial.println(r);
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