第十二週上課內容

const int sensorPin = A0;

const float baselineTemp = 23.0;

void setup(){ Serial.begin(9600); for(int pinNumber = 2; pinNumber < 5; pinNumber++){ pinMode(pinNumber, OUTPUT); digitalWrite(pinNumber, LOW); } }

void loop(){ int sensorVal = analogRead(sensorPin); Serial.print("Sensor Value: "); Serial.print(sensorVal); float voltage = (sensorVal/1024.0)*5.0; Serial.print(", Volts: "); Serial.print(voltage); Serial.print(", Degrees: "); float temperature = (voltage - .5)*100; Serial.println(temperature); if(temperature < baselineTemp){ digitalWrite(2, LOW); digitalWrite(3, LOW); digitalWrite(4, LOW); } else if(temperature >= baselineTemp+2 && temperature < baselineTemp+4){ digitalWrite(2, HIGH); digitalWrite(3, LOW); digitalWrite(4, LOW); } else if(temperature >= baselineTemp+4 && temperature < baselineTemp+6){ digitalWrite(2, HIGH); digitalWrite(3, HIGH); digitalWrite(4, LOW); } else if(temperature >= baselineTemp +6){ digitalWrite(2, HIGH); digitalWrite(3, HIGH); digitalWrite(4, HIGH); } delay(100); }

const int Brightness = 20; // set overall brightness, use lower value in darkroom to protect your eyes (0-255)

const int greenLEDPin = 9; // LED connected to digital pin 9 const int redLEDPin = 10; // LED connected to digital pin 10 const int blueLEDPin = 11; // LED connected to digital pin 11

const int redSensorPin = A0; // pin with the photoresistor with the red gel const int greenSensorPin = A1; // pin with the photoresistor with the green gel const int blueSensorPin = A2; // pin with the photoresistor with the blue gel

int redSensorValue = 0; // variable to hold the value from the red sensor int greenSensorValue = 0; // variable to hold the value from the green sensor int blueSensorValue = 0; // variable to hold the value from the blue sensor

int redSensorHigh = 0; //High and low value for mapping. Notice that 'High' value were set low at 0, so that during calibration, its value would be be pushed up. See project 6. int greenSensorHigh = 0; int blueSensorHigh = 0; int redSensorLow = 1023; // the opposite is true for 'Low' value int greenSensorLow = 1023; int blueSensorLow = 1023;

void setup() { // initialize serial communications at 9600 bps: Serial.begin(9600);

// set the digital pins as outputs pinMode(greenLEDPin,OUTPUT); pinMode(redLEDPin,OUTPUT); pinMode(blueLEDPin,OUTPUT); //switching on your lamp before calibration, as it would affect calibration too, especially in dark environment analogWrite(redLEDPin, Brightness); analogWrite(greenLEDPin, Brightness); analogWrite(blueLEDPin, Brightness); //actual calibration which takes 10 seconds. During calibration, LED would shine at constant brightness. After that, it'll start to respond. while (millis() < 10000) { redSensorValue = analogRead(redSensorPin); //read pin if (redSensorValue > redSensorHigh) { //push 'High' value up based on sensor value. At the end of calibration, 'High' value would take the highest 'SensorValue' during the 10 seconds. redSensorHigh = redSensorValue; } if (redSensorValue < redSensorLow) { //opposite is true for 'Low' value redSensorLow = redSensorValue; } delay(5); greenSensorValue = analogRead(greenSensorPin); if (greenSensorValue > greenSensorHigh) { greenSensorHigh = greenSensorValue; } if (greenSensorValue < greenSensorLow) { greenSensorLow = greenSensorValue; } delay(5); blueSensorValue = analogRead(blueSensorPin); if (blueSensorValue > blueSensorHigh) { blueSensorHigh = blueSensorValue; } if (blueSensorValue < blueSensorLow) { blueSensorLow = blueSensorValue; } delay(5); } }

void loop() { // Read the sensors first: // read the value from the red-filtered photoresistor: redSensorValue = analogRead(redSensorPin); // give the ADC a moment to settle delay(5); // read the value from the green-filtered photoresistor: greenSensorValue = analogRead(greenSensorPin); // give the ADC a moment to settle delay(5); // read the value from the blue-filtered photoresistor: blueSensorValue = analogRead(blueSensorPin);

// print out the values to the serial monitor Serial.print("raw sensor Values \t red: "); Serial.print(redSensorValue); Serial.print("\t green: "); Serial.print(greenSensorValue); Serial.print("\t Blue: "); Serial.println(blueSensorValue);

int redValue = map(redSensorValue,redSensorLow,redSensorHigh,0,Brightness); redValue = constrain(redValue,0,255); int greenValue = map(greenSensorValue,greenSensorLow,greenSensorHigh,0,Brightness); greenValue = constrain(greenValue,0,255); int blueValue = map(blueSensorValue,blueSensorLow,blueSensorHigh,0,Brightness); blueValue = constrain(blueValue,0,255);

// print out the mapped values Serial.print("Mapped sensor Values \t red: "); Serial.print(redValue); Serial.print("\t green: "); Serial.print(greenValue); Serial.print("\t Blue: "); Serial.println(blueValue);

analogWrite(redLEDPin, redValue); analogWrite(greenLEDPin, greenValue); analogWrite(blueLEDPin, blueValue); }