Regolith Boys - Space Apps Challenge

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UV scanning

Diego Dal Pozzolo dos Santos

	#include<LiquidCrystal.h>
	LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
	//Hardware pin definitions
	int UVOUT = A0; //Output from the sensor
	int REF_3V3 = A1; //3.3V power on the Arduino board

	//https://www.how2electronics.com/uv-sensor-ml8511-arduino-for-uv-ray-intensity-measurement/
	voidsetup()
	{
	Serial.begin(9600);
	lcd.begin(16, 2);

	pinMode(UVOUT, INPUT);
	pinMode(REF_3V3, INPUT);

	Serial.println("ML8511 example");

	}

	voidloop()
	{
	int uvLevel = averageAnalogRead(UVOUT);
	int refLevel = averageAnalogRead(REF_3V3);

	//Use the 3.3V power pin as a reference to get a very accurate output value from sensor
	float outputVoltage = 3.3 / refLevel * uvLevel;

	float uvIntensity = mapfloat(outputVoltage, 0.99, 2.8, 0.0, 15.0); //Convert the voltage to a UV intensity level

	Serial.print("output: ");
	Serial.print(refLevel);

	Serial.print("ML8511 output: ");
	Serial.print(uvLevel);

	Serial.print(" / ML8511 voltage: ");
	Serial.print(outputVoltage);

	Serial.print(" / UV Intensity (mW/cm^2): ");
	Serial.print(uvIntensity);
	lcd.clear();
	lcd.print("UV Ray Intensity");
	lcd.setCursor(0, 1);
	lcd.print(uvIntensity);
	lcd.print(" mW/cm^2");

	Serial.println();

	delay(200);
	}

	//Takes an average of readings on a given pin
	//Returns the average
	intaverageAnalogRead(int pinToRead)
	{
	byte numberOfReadings = 8;
	unsignedint runningValue = 0;

	for(int x = 0 ; x < numberOfReadings ; x++)
	runningValue += analogRead(pinToRead);
	runningValue /= numberOfReadings;

	return(runningValue);
	}

	floatmapfloat(float x, float in_min, float in_max, float out_min, float out_max)
	{
	return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
	}