sensorShieldLib.h

/*
  sensorShieldLib.h - Library for communicating sensors values in JSON.
  Created by Lionel Radisson @Makio135, February, 2015.
  Released into the public domain.
*/
#pragma once

#include "Arduino.h"

#define MAX_NUMBER_OF_SENSORS 30

enum SensorType {
	SIMPLE, // simple analog/digital sensor
	INT_PROCESS_VALUE, // sensor with an integer process function 
	FLOAT_PROCESS_VALUE, // sensor with a float process function 
	INT_FUNCTION, // integer function working as sensor
	FLOAT_FUNCTION // float function working as sensor
};

struct sensorStruct {
	String sensorID;
	int pin;
	bool isDigital;
	bool invertValue;
	float sensitivity;
	int value;
	float fValue;
	int min;
	int max;
	SensorType type;
	int (*customInt)(int);
	float (*customFloat)(int);
	int (*customSensorInt)();
	float (*customSensorFloat)();
};

class SensorShield {
	public:
		SensorShield();

		void init();
		void init(Stream &stream);

		void setDigitalPinsRange(int pinMin, int pinMax);
		void setAnalogPinsRange(int pinMin, int pinMax);

		void addSensor(String sensorID, int pin);
		void addSensor(String sensorID, int pin, int mode);

		void addSensor(String sensorID, int(*custFunction)());
		void addSensor(String sensorID, float(*custFunction)());

		void setSensorSensitivity(float sensitivity);
		void setSensorSensitivity(String sensorID, float sensitivity);

		void setSensorLimits(int min, int max);
		void setSensorLimits(String sensorID, int min, int max);

		void invertSensorValue(String sensorID);

		void setSensorProcess(String sensorID, int(*custFunction)(int));
		void setSensorProcess(String sensorID, float(*custFunction)(int));

		void emitLightOnChange(int ledPin);
		void emitLightOnChange(bool turnLightOn);

		void update();

		int getSensorValue(String sensorID);
		float getSensorFValue(String sensorID);

		bool hasNewValue;
		String JSONMessage;

	private:
		Stream * SensorShieldStream;

		int digitalPinMin;
		int digitalPinMax;
		int analogPinMin;
		int analogPinMax;
		
		int nbSensors;
		
		int sensitivity;
		int analogMin;
		int analogMax;

		int indicatorLedPin;
		bool turnLightOn;

		sensorStruct sensors[MAX_NUMBER_OF_SENSORS];

		void initValues();
		void addDigitalSensor(int pin, int mode);
		void addAnalogSensor();
		void lightup();
		void createJSON();
		void sendJSON();
};