NodeManager.h

/*
 * NodeManager
 */
#ifndef NodeManager_h
#define NodeManager_h

#include <Arduino.h>

// define NodeManager version
#define VERSION "1.6-dev"

/***********************************
   Constants
*/

// define sleep mode
#define IDLE 0
#define SLEEP 1
#define WAIT 2
#define ALWAYS_ON 3

// define time unit
#define SECONDS 0
#define MINUTES 1
#define HOURS 2
#define DAYS 3
#define CYCLES 4

// define value type
#define TYPE_INTEGER 0
#define TYPE_FLOAT 1
#define TYPE_STRING 2

// define interrupt pins
#define INTERRUPT_PIN_1 3
#define INTERRUPT_PIN_2 2

// define configuration settings that can be saved and loaded from the EEPROM
#define SAVE_SLEEP_MODE 0
#define SAVE_SLEEP_TIME 1
#define SAVE_SLEEP_UNIT 2

// define eeprom addresses
#define EEPROM_SLEEP_SAVED 0
#define EEPROM_SLEEP_MODE 1
#define EEPROM_SLEEP_TIME_MAJOR 2
#define EEPROM_SLEEP_TIME_MINOR 3
#define EEPROM_SLEEP_UNIT 4
#define EEPROM_USER_START 100

// define requests

/************************************
 * Include user defined configuration settings
 */
 
#include "config.h"

/***********************************
   Default configuration settings
*/
// if enabled, enable debug messages on serial port
#ifndef DEBUG
  #define DEBUG 1
#endif

// if enabled, enable the capability to power on sensors with the arduino's pins to save battery while sleeping
#ifndef POWER_MANAGER
  #define POWER_MANAGER 1
#endif
// if enabled, will load the battery manager library to allow the battery level to be reported automatically or on demand
#ifndef BATTERY_MANAGER
  #define BATTERY_MANAGER 1
#endif
// if enabled, allow modifying the configuration remotely by interacting with the configuration child id
#ifndef REMOTE_CONFIGURATION
  #define REMOTE_CONFIGURATION 1
#endif
// if enabled, persist the configuration settings on EEPROM
#ifndef PERSIST
  #define PERSIST 0
#endif

// if enabled, send a SLEEPING and AWAKE service messages just before entering and just after leaving a sleep cycle
#ifndef SERVICE_MESSAGES
  #define SERVICE_MESSAGES 0
#endif
// if enabled, a battery sensor will be created at BATTERY_CHILD_ID and will report vcc voltage together with the battery level percentage
#ifndef BATTERY_SENSOR
  #define BATTERY_SENSOR 1
#endif

// the child id used to allow remote configuration
#ifndef CONFIGURATION_CHILD_ID
  #define CONFIGURATION_CHILD_ID 200
#endif
// the child id used to report the battery voltage to the controller
#ifndef BATTERY_CHILD_ID
  #define BATTERY_CHILD_ID 201
#endif
// define the maximum number of sensors that can be managed
#ifndef MAX_SENSORS
  #define MAX_SENSORS 10
#endif

/***********************************
   Default module settings
*/

// Enable this module to use one of the following sensors: SENSOR_ANALOG_INPUT, SENSOR_LDR, SENSOR_THERMISTOR, SENSOR_ACS712
#ifndef MODULE_ANALOG_INPUT
  #define MODULE_ANALOG_INPUT 0
#endif
// Enable this module to use one of the following sensors: SENSOR_DIGITAL_INPUT
#ifndef MODULE_DIGITAL_INPUT
  #define MODULE_DIGITAL_INPUT 0
#endif
// Enable this module to use one of the following sensors: SENSOR_DIGITAL_OUTPUT, SENSOR_RELAY, SENSOR_LATCHING_RELAY
#ifndef MODULE_DIGITAL_OUTPUT
  #define MODULE_DIGITAL_OUTPUT 0
#endif
// Enable this module to use one of the following sensors: SENSOR_SHT21, SENSOR_HTU21D
#ifndef MODULE_SHT21
  #define MODULE_SHT21 0
#endif
// Enable this module to use one of the following sensors: SENSOR_DHT11, SENSOR_DHT22
#ifndef MODULE_DHT
  #define MODULE_DHT 0
#endif
// Enable this module to use one of the following sensors: SENSOR_SWITCH, SENSOR_DOOR, SENSOR_MOTION
#ifndef MODULE_SWITCH
  #define MODULE_SWITCH 0
#endif
// Enable this module to use one of the following sensors: SENSOR_DS18B20
#ifndef MODULE_DS18B20
  #define MODULE_DS18B20 0
#endif
// Enable this module to use one of the following sensors: SENSOR_BH1750
#ifndef MODULE_BH1750
  #define MODULE_BH1750 0
#endif
// Enable this module to use one of the following sensors: SENSOR_MLX90614
#ifndef MODULE_MLX90614
  #define MODULE_MLX90614 0
#endif
// Enable this module to use one of the following sensors: SENSOR_BME280
#ifndef MODULE_BME280
  #define MODULE_BME280 0
#endif
// Enable this module to use one of the following sensors: SENSOR_SONOFF
#ifndef MODULE_SONOFF
  #define MODULE_SONOFF 0
#endif
// Enable this module to use one of the following sensors: SENSOR_BMP085
#ifndef MODULE_BMP085
  #define MODULE_BMP085 0
#endif
// Enable this module to use one of the following sensors: SENSOR_HCSR04
#ifndef MODULE_HCSR04
  #define MODULE_HCSR04 0
#endif
// Enable this module to use one of the following sensors: SENSOR_MCP9808
#ifndef MODULE_MCP9808
  #define MODULE_MCP9808 0
#endif
// Enable this module to use one of the following sensors: SENSOR_MQ
#ifndef MODULE_MQ
  #define MODULE_MQ 0
#endif

/***********************************
   Supported Sensors
*/
enum supported_sensors {
  #if MODULE_ANALOG_INPUT == 1
    // Generic analog sensor, return a pin's analog value or its percentage
    SENSOR_ANALOG_INPUT,
    // LDR sensor, return the light level of an attached light resistor in percentage
    SENSOR_LDR,
    // Thermistor sensor, return the temperature based on the attached thermistor
    SENSOR_THERMISTOR,
    // ML8511 UV sensor
    SENSOR_ML8511,
    // Current sensor
    SENSOR_ACS712,
    // rain gauge sensor
    SENSOR_RAIN_GAUGE,
    // Rain sensor, return the percentage of rain from an attached analog sensor
    SENSOR_RAIN,
    // Soil moisture sensor, return the percentage of moisture from an attached analog sensor
    SENSOR_SOIL_MOISTURE,
  #endif
  #if MODULE_DIGITAL_INPUT == 1
    // Generic digital sensor, return a pin's digital value
    SENSOR_DIGITAL_INPUT,
  #endif
  #if MODULE_DIGITAL_OUTPUT == 1
    // Generic digital output sensor, allows setting the digital output of a pin to the requested value
    SENSOR_DIGITAL_OUTPUT,
    // Relay sensor, allows activating the relay
    SENSOR_RELAY,
    // Latching Relay sensor, allows activating the relay with a pulse
    SENSOR_LATCHING_RELAY,
  #endif
  #if MODULE_DHT == 1
    // DHT11/DHT22 sensors, return temperature/humidity based on the attached DHT sensor
    SENSOR_DHT11,
    SENSOR_DHT22,
  #endif
  #if MODULE_SHT21 == 1
    // SHT21 sensor, return temperature/humidity based on the attached SHT21 sensor
    SENSOR_SHT21,
    SENSOR_HTU21D,
  #endif
  #if MODULE_SWITCH == 1
    // Generic switch, wake up the board when a pin changes status
    SENSOR_SWITCH,
    // Door sensor, wake up the board and report when an attached magnetic sensor has been opened/closed
    SENSOR_DOOR,
    // Motion sensor, wake up the board and report when an attached PIR has triggered
    SENSOR_MOTION,
  #endif
  #if MODULE_DS18B20 == 1
    // DS18B20 sensor, return the temperature based on the attached sensor
    SENSOR_DS18B20,
  #endif
  #if MODULE_BH1750 == 1
    // BH1750 sensor, return light in lux
    SENSOR_BH1750,
  #endif
  #if MODULE_MLX90614 == 1
    // MLX90614 sensor, contactless temperature sensor
    SENSOR_MLX90614,
  #endif
  #if MODULE_BME280 == 1
    // MLX90614 sensor, contactless temperature sensor
    SENSOR_BME280,
  #endif
  #if MODULE_SONOFF == 1
    // Sonoff wireless smart switch
    SENSOR_SONOFF,
  #endif
  #if MODULE_BMP085 == 1
    // BMP085/BMP180 sensor, return temperature and pressure
    SENSOR_BMP085,
  #endif
  #if MODULE_HCSR04 == 1
    // HC-SR04 sensor, return the distance between the sensor and an object
    SENSOR_HCSR04,
  #endif
  #if MODULE_MCP9808 == 1
    // MCP9808 sensor, precision temperature sensor
    SENSOR_MCP9808,
  #endif
  #if MODULE_MQ == 1
    // MQ2 air quality sensor
    SENSOR_MQ,
  #endif
};
/***********************************
  Libraries
*/

// include supporting libraries
#ifdef MY_USE_UDP
    #include <WiFiUdp.h>
#endif
#ifdef MY_GATEWAY_ESP8266
  #include <ESP8266WiFi.h>
#endif

// include MySensors libraries
#include <core/MySensorsCore.h>
#include <core/MyCapabilities.h>

// include third party libraries
#if MODULE_DHT == 1
  #include <DHT.h>
#endif
#if MODULE_SHT21 == 1
  #include <Wire.h>
  #include <Sodaq_SHT2x.h>
#endif
#if MODULE_DS18B20 == 1
  #include <OneWire.h>
  #include <DallasTemperature.h>
#endif
#if MODULE_BH1750 == 1
  #include <BH1750.h>
  #include <Wire.h>
#endif
#if MODULE_MLX90614 == 1
  #include <Wire.h>
  #include <Adafruit_MLX90614.h>
#endif
#if MODULE_BME280 == 1
  #include <Wire.h>
  #include <SPI.h>
  #include <Adafruit_Sensor.h>
  #include <Adafruit_BME280.h>
#endif
#if MODULE_SONOFF == 1
  #include <Bounce2.h>
#endif
#if MODULE_BMP085 == 1
  #include <Wire.h>
  #include <Adafruit_BMP085.h>
#endif
#if MODULE_HCSR04 == 1
  #include <NewPing.h>
#endif
#if MODULE_MCP9808 == 1
  #include <Wire.h>
  #include "Adafruit_MCP9808.h"
#endif

/*******************************************************************
   Classes
*/
class NodeManager;

/*
   PowerManager
*/

class PowerManager {
  public:
    PowerManager() {};
    // to save battery the sensor can be optionally connected to two pins which will act as vcc and ground and activated on demand
    void setPowerPins(int ground_pin, int vcc_pin, int wait_time = 50);
    // turns the power pins on
    void powerOn();
    // turns the power pins on
    void powerOff();
    // returns the Vcc voltge
    float getVcc();
    // turns true if power pins are configured
    bool isConfigured();
  private:
    int _vcc_pin = -1;
    int _ground_pin = -1;
    long _wait = 0;
};

/*
   Timer
*/

class Timer {
  public:
    Timer(NodeManager* node_manager);
    // start the timer which will be over when interval passes by. Unit can be either CYCLES or MINUTES
    void start(long target, int unit);
    void start();
    // stop the timer
    void stop();
    // set the timer configuration but do not start it
    void set(long target, int unit);
    // update the timer. To be called at every cycle
    void update();
    // returns true if the time is over
    bool isOver();
    // return true if the timer is running
    bool isRunning();
    // returns true if the timer has been configured
    bool isConfigured();
    // reset the timer and start over
    void restart();
    // return the current elapsed time
    float getElapsed();
    // return the configured unit
    int getUnit();
    // return the configured target
    int getTarget();
   private:
    NodeManager* _node_manager;
    long _target = 0;
    int _unit = 0;
    float _elapsed = 0;
    bool _use_millis = false;
    long _last_millis = 0;
    float _sleep_time = 0;
    bool _is_running = false;
    bool _is_configured = false;
};

/*
   Request
*/

class Request {
  public:
    Request(const char* string);
    // return the parsed function
    int getFunction();
    // return the value as an int
    int getValueInt();
    // return the value as a float
    float getValueFloat();
    // return the value as a string
    char* getValueString();
   private:
    NodeManager* _node_manager;
    int _function;
    char* _value;
};

/***************************************
   Sensor: generic sensor class
*/
class Sensor {
  public:
    Sensor(NodeManager* node_manager, int child_id, int pin);
    // [1] where the sensor is attached to (default: not set)
    void setPin(int value);
    int getPin();
    // [2] child_id of this sensor (default: not set)
    void setChildId(int value);
    int getChildId();
    // presentation of this sensor (default: S_CUSTOM)
    void setPresentation(int value);
    int getPresentation();
    // [3] type of this sensor (default: V_CUSTOM)
    void setType(int value);
    int getType();
    // [4] description of the sensor (default: '')
    void setDescription(char *value);
    // [5] For some sensors, the measurement can be queried multiple times and an average is returned (default: 1)
    void setSamples(int value);
    // [6] If more then one sample has to be taken, set the interval in milliseconds between measurements (default: 0)
    void setSamplesInterval(int value);
    // [7] if true will report the measure only if different than the previous one (default: false)
    void setTrackLastValue(bool value);
    // [8] if track last value is enabled, force to send an update after the configured number of cycles (default: -1)
    void setForceUpdate(int value);
    void setForceUpdateCycles(int value);
    // [9] if track last value is enabled, force to send an update after the configured number of minutes (default: -1)
    void setForceUpdateMinutes(int value);
    // [10] the value type of this sensor (default: TYPE_INTEGER)
    void setValueType(int value);
    int getValueType();
    // [11] for float values, set the float precision (default: 2)
    void  setFloatPrecision(int value);
    #if POWER_MANAGER == 1
      // to save battery the sensor can be optionally connected to two pins which will act as vcc and ground and activated on demand
      void setPowerPins(int ground_pin, int vcc_pin, int wait_time = 50);
      // [12] if enabled the pins will be automatically powered on while awake and off during sleeping (default: true)
      void setAutoPowerPins(bool value);
      // [13] manually turn the power on
      void powerOn();
      // [14] manually turn the power off
      void powerOff();
    #endif
    // get the latest recorded value from the sensor
    int getValueInt();
    float getValueFloat();
    char* getValueString();
    // [15] After how many cycles the sensor will report back its measure (default: 1 cycle)
    void setReportIntervalCycles(int value);
    // [16] After how many minutes the sensor will report back its measure (default: 1 cycle)
    void setReportIntervalMinutes(int value);
    // process a remote request
    void process(Request & request);
    // return the pin the interrupt is attached to
    int getInterruptPin();
    // define what to do at each stage of the sketch
    virtual void before();
    virtual void presentation();
    virtual void setup();
    virtual void loop(const MyMessage & message);
    virtual void receive(const MyMessage & message);
    // abstract functions, subclasses need to implement
    virtual void onBefore() = 0;
    virtual void onSetup() = 0;
    virtual void onLoop() = 0;
    virtual void onReceive(const MyMessage & message) = 0;
    virtual void onProcess(Request & request) = 0;
  protected:
    MyMessage _msg;
    MyMessage _msg_service;
    NodeManager* _node_manager;
    int _pin = -1;
    int _child_id;
    int _presentation = S_CUSTOM;
    int _type = V_CUSTOM;
    char* _description = "";
    int _samples = 1;
    int _samples_interval = 0;
    bool _track_last_value = false;
    int _value_type = TYPE_INTEGER;
    int _float_precision = 2;
    int _value_int = -1;
    float _value_float = -1;
    char * _value_string = "";
    int _last_value_int = -1;
    float _last_value_float = -1;
    char * _last_value_string = "";
    int _interrupt_pin = -1;
    #if POWER_MANAGER  == 1
      PowerManager _powerManager;
      bool _auto_power_pins = true;
    #endif
    Timer* _report_timer;
    Timer* _force_update_timer;
    void _send(MyMessage & msg);
    bool _isReceive(const MyMessage & message);
    bool _isWorthSending(bool comparison);
};

#if MODULE_ANALOG_INPUT == 1
/*
   SensorAnalogInput: read the analog input of a configured pin
*/
class SensorAnalogInput: public Sensor {
  public:
    SensorAnalogInput(NodeManager* node_manager, int child_id, int pin);
    // [101] the analog reference to use (default: not set, can be either INTERNAL or DEFAULT)
    void setReference(int value);
    // [102] reverse the value or the percentage (e.g. 70% -> 30%) (default: false)
    void setReverse(bool value);
    // [103] when true returns the value as a percentage (default: true)
    void setOutputPercentage(bool value);
    // [104] minimum value for calculating the percentage (default: 0)
    void setRangeMin(int value);
    // [105] maximum value for calculating the percentage (default: 1024)
    void setRangeMax(int value);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    int _reference = -1;
    bool _reverse = false;
    bool _output_percentage = true;
    int _range_min = 0;
    int _range_max = 1024;
    int _getPercentage(int value);
    int _getAnalogRead();
};

/*
   SensorLDR: return the percentage of light from a Light dependent resistor
*/
class SensorLDR: public SensorAnalogInput {
  public:
    SensorLDR(NodeManager* node_manager, int child_id, int pin);
};

/*
   SensorThermistor: read the temperature from a thermistor
*/
class SensorThermistor: public Sensor {
  public:
    SensorThermistor(NodeManager* node_manager, int child_id, int pin);
    // [101] resistance at 25 degrees C (default: 10000)
    void setNominalResistor(long value);
    // [102] temperature for nominal resistance (default: 25)
    void setNominalTemperature(int value);
    // [103] The beta coefficient of the thermistor (default: 3950)
    void setBCoefficient(int value);
    // [104] the value of the resistor in series with the thermistor (default: 10000)
    void setSeriesResistor(long value);
    // [105] set a temperature offset
    void setOffset(float value);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    long _nominal_resistor = 10000;
    int _nominal_temperature = 25;
    int _b_coefficient = 3950;
    long _series_resistor = 10000;
    float _offset = 0;
};

/*
    SensorML8511
*/

class SensorML8511: public Sensor {
  public:
    SensorML8511(NodeManager* node_manager, int child_id, int pin);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    float _mapfloat(float x, float in_min, float in_max, float out_min, float out_max);
};

/*
    SensorACS712
*/

class SensorACS712: public Sensor {
  public:
    SensorACS712(NodeManager* node_manager, int child_id, int pin);
    // [101] set how many mV are equivalent to 1 Amp. The value depends on the module (100 for 20A Module, 66 for 30A Module) (default: 185);
    void setmVPerAmp(int value);
    // [102] set ACS offset (default: 2500);
    void setOffset(int value);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    int _ACS_offset = 2500;
    int _mv_per_amp = 185;
};

/*
    SensorRainGauge
*/

class SensorRainGauge: public Sensor {
  public:
    SensorRainGauge(NodeManager* node_manager, int child_id, int pin);
    // [101] set how frequently to report back to the controller in minutes. After reporting the measure is resetted (default: 60)
    void setReportInterval(int value);
    // [102] set how many mm of rain to count for each tip (default: 0.11)
    void setSingleTip(float value);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  public:
    static void _onTipped();
    static long _last_tip;
    static long _count;
  protected:
    int _report_interval = 60;
    float _single_tip = 0.11;
    Timer* _timer;
};

/*
   SensorRain
*/
class SensorRain: public SensorAnalogInput {
  public:
    SensorRain(NodeManager* node_manager, int child_id, int pin);
};

/*
   SensorSoilMoisture
*/
class SensorSoilMoisture: public SensorAnalogInput {
  public:
    SensorSoilMoisture(NodeManager* node_manager, int child_id, int pin);
};
#endif


#if MODULE_DIGITAL_INPUT == 1
/*
   SensorDigitalInput: read the digital input of the configured pin
*/
class SensorDigitalInput: public Sensor {
  public:
    SensorDigitalInput(NodeManager* node_manager, int child_id, int pin);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
};
#endif

#if MODULE_DIGITAL_OUTPUT == 1
/*
   SensorDigitalOutput: control a digital output of the configured pin
*/
class SensorDigitalOutput: public Sensor {
  public:
    SensorDigitalOutput(NodeManager* node_manager, int child_id, int pin);
    // [101] set how to initialize the output (default: LOW)
    void setInitialValue(int value);
    // [102] if greater than 0, send a pulse of the given duration in ms and then restore the output back to the original value (default: 0)
    void setPulseWidth(int value);
    // [103] define which value to set to the output when set to on (default: HIGH)
    void setOnValue(int value);
    // [104] when legacy mode is enabled expect a REQ message to trigger, otherwise the default SET (default: false)
    void setLegacyMode(bool value);
    // [105] automatically turn the output off after the given number of minutes
    void setSafeguard(int value);
    // [106] if true the input value becomes a duration in minutes after which the output will be automatically turned off (default: false)
    void setInputIsElapsed(bool value);
    // manually switch the output to the provided value
    void set(int value);
    // get the current state
    int getState();
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    int _initial_value = LOW;
    int _on_value = HIGH;
    int _state = 0;
    int _pulse_width = 0;
    bool _legacy_mode = false;
    bool _input_is_elapsed = false;
    Timer* _safeguard_timer;
};


/*
   SensorRelay
*/
class SensorRelay: public SensorDigitalOutput {
  public:
    SensorRelay(NodeManager* node_manager, int child_id, int pin);
};

/*
   SensorLatchingRelay
*/
class SensorLatchingRelay: public SensorRelay {
  public:
    SensorLatchingRelay(NodeManager* node_manager, int child_id, int pin);
};
#endif

/*
   SensorDHT
*/
#if MODULE_DHT == 1
class SensorDHT: public Sensor {
  public:
    SensorDHT(NodeManager* node_manager, int child_id, int pin, DHT* dht, int sensor_type, int dht_type);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
    // constants
    const static int TEMPERATURE = 0;
    const static int HUMIDITY = 1;
  protected:
    DHT* _dht;
    int _dht_type = DHT11;
    float _offset = 0;
    int _sensor_type = 0;
};
#endif

/*
   SensorSHT21: temperature and humidity sensor
*/
#if MODULE_SHT21 == 1
class SensorSHT21: public Sensor {
  public:
    SensorSHT21(NodeManager* node_manager, int child_id, int sensor_type);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
    // constants
    const static int TEMPERATURE = 0;
    const static int HUMIDITY = 1;
  protected:
    float _offset = 0;
    int _sensor_type = 0;
};

/*
   SensorHTU21D: temperature and humidity sensor
*/

class SensorHTU21D: public SensorSHT21 {
  public:
    SensorHTU21D(NodeManager* node_manager, int child_id, int pin);
};
#endif

/*
 * SensorSwitch
 */
#if MODULE_SWITCH == 1
class SensorSwitch: public Sensor {
  public:
    SensorSwitch(NodeManager* node_manager, int child_id, int pin);
    // [101] set the interrupt mode. Can be CHANGE, RISING, FALLING (default: CHANGE)
    void setMode(int value);
    // [102] milliseconds to wait before reading the input (default: 0)
    void setDebounce(int value);
    // [103] time to wait in milliseconds after a change is detected to allow the signal to be restored to its normal value (default: 0)
    void setTriggerTime(int value);
    // [104] Set initial value on the interrupt pin (default: HIGH)
    void setInitial(int value);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    int _debounce = 0;
    int _trigger_time = 0;
    int _mode = CHANGE;
    int _initial = HIGH;
};

/*
 * SensorDoor
 */
class SensorDoor: public SensorSwitch {
  public:
    SensorDoor(NodeManager* node_manager, int child_id, int pin);
};

/*
 * SensorMotion
 */
class SensorMotion: public SensorSwitch {
  public:
    SensorMotion(NodeManager* node_manager, int child_id, int pin);
};
#endif
/*
   SensorDs18b20
*/
#if MODULE_DS18B20 == 1
class SensorDs18b20: public Sensor {
  public:
    SensorDs18b20(NodeManager* node_manager, int child_id, int pin, DallasTemperature* sensors, int index);
    // returns the sensor's resolution in bits
    int getResolution();
    // [101] set the sensor's resolution in bits
    void setResolution(int value);
    // [102] sleep while DS18B20 calculates temperature (default: false)
    void setSleepDuringConversion(bool value);
    // return the sensors' device address
    DeviceAddress* getDeviceAddress();
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    float _offset = 0;
    int _index;
    bool _sleep_during_conversion = false;
    DallasTemperature* _sensors;
    DeviceAddress _device_address;
};
#endif

/*
   SensorBH1750
*/
#if MODULE_BH1750 == 1
class SensorBH1750: public Sensor {
  public:
    SensorBH1750(NodeManager* node_manager, int child_id);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    BH1750* _lightSensor;
};
#endif

/*
   SensorMLX90614
*/
#if MODULE_MLX90614 == 1
class SensorMLX90614: public Sensor {
  public:
    SensorMLX90614(NodeManager* node_manager, int child_id, Adafruit_MLX90614* mlx, int sensor_type);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
    // constants
    const static int TEMPERATURE_AMBIENT = 0;
    const static int TEMPERATURE_OBJECT = 1;
  protected:
    Adafruit_MLX90614* _mlx;
    int _sensor_type;
};
#endif


/*
 * SensorBosch
*/

#if MODULE_BME280 == 1 || MODULE_BMP085 == 1
class SensorBosch: public Sensor {
  public:
    SensorBosch(NodeManager* node_manager, int child_id, int sensor_type);
    // [101] define how many pressure samples to keep track of for calculating the forecast (default: 5)
    void setForecastSamplesCount(int value);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
    // constants
    const static int TEMPERATURE = 0;
    const static int HUMIDITY = 1;
    const static int PRESSURE = 2;
    const static int FORECAST = 3;
    static uint8_t GetI2CAddress(uint8_t chip_id);
  protected:
    int _sensor_type;
    char* _weather[6] = { "stable", "sunny", "cloudy", "unstable", "thunderstorm", "unknown" };
    int _forecast_samples_count = 5;
    float* _forecast_samples;
    int _minute_count = 0;
    float _pressure_avg;
    float _pressure_avg2;
    float _dP_dt;
    bool _first_round = true;
    float _getLastPressureSamplesAverage();
    void _forecast(float pressure);
};
#endif

/*
   SensorBME280
*/
#if MODULE_BME280 == 1
class SensorBME280: public SensorBosch {
  public:
    SensorBME280(NodeManager* node_manager, int child_id, Adafruit_BME280* bme, int sensor_type);
    void onLoop();
  protected:
    Adafruit_BME280* _bme;
};
#endif

/*
   SensorBMP085
*/
#if MODULE_BMP085 == 1
class SensorBMP085: public SensorBosch {
  public:
    SensorBMP085(NodeManager* node_manager, int child_id, Adafruit_BMP085* bmp, int sensor_type);
    void onLoop();
  protected:
    Adafruit_BMP085* _bmp;
};
#endif

/*
   SensorHCSR04
*/
#if MODULE_HCSR04 == 1
class SensorHCSR04: public Sensor {
  public:
    SensorHCSR04(NodeManager* node_manager, int child_id, int pin);
    // [101] Arduino pin tied to trigger pin on the ultrasonic sensor (default: the pin set while registering the sensor)
    void setTriggerPin(int value);
    // [102] Arduino pin tied to echo pin on the ultrasonic sensor (default: the pin set while registering the sensor)
    void setEchoPin(int value);
    // [103] Maximum distance we want to ping for (in centimeters) (default: 300)
    void setMaxDistance(int value);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    int _trigger_pin;
    int _echo_pin;
    int _max_distance = 300;
    NewPing* _sonar;
};
#endif

/*
   SensorSonoff
*/
#if MODULE_SONOFF == 1
class SensorSonoff: public Sensor {
  public:
    SensorSonoff(NodeManager* node_manager, int child_id);
    // [101] set the button's pin (default: 0)
    void setButtonPin(int value);
    // [102] set the relay's pin (default: 12)
    void setRelayPin(int value);
    // [103] set the led's pin (default: 13)
    void setLedPin(int value);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    Bounce _debouncer = Bounce();
    int _button_pin = 0;
    int _relay_pin = 12;
    int _led_pin = 13;
    int _old_value = 0;
    bool _state = false;
    int _relay_on = 1;
    int _relay_off = 0;
    int _led_on = 0;
    int _led_off = 1;
    void _blink();
    void _toggle();
};
#endif

/*
   SensorMCP9808
*/
#if MODULE_MCP9808 == 1
class SensorMCP9808: public Sensor {
  public:
    SensorMCP9808(NodeManager* node_manager, int child_id, Adafruit_MCP9808* mcp);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    Adafruit_MCP9808* _mcp;
};
#endif

/*
    SensorMQ
 */
 #if MODULE_MQ == 1
class SensorMQ: public Sensor {
  public:
    SensorMQ(NodeManager* node_manager, int child_id, int pin);
    // [101] define the target gas whose ppm has to be returned. 0: LPG, 1: CO, 2: Smoke (default: 1);
    void setTargetGas(int value);
    // [102] define the load resistance on the board, in kilo ohms (default: 1);
    void setRlValue(float value);
    // [103] define the Ro resistance on the board (default: 10000);
    void setRoValue(float value);
    // [104] Sensor resistance in clean air (default: 9.83);
    void setCleanAirFactor(float value);
    // [105] define how many samples you are going to take in the calibration phase (default: 50);
    void setCalibrationSampleTimes(int value);
    // [106] define the time interal(in milisecond) between each samples in the cablibration phase (default: 500);
    void setCalibrationSampleInterval(int value);
    // [107] define how many samples you are going to take in normal operation (default: 50);
    void setReadSampleTimes(int value);
    // [108] define the time interal(in milisecond) between each samples in the normal operations (default: 5);
    void setReadSampleInterval(int value);
    // set the LPGCurve array (default: {2.3,0.21,-0.47})
    void setLPGCurve(float *value);
    // set the COCurve array (default: {2.3,0.72,-0.34})
    void setCOCurve(float *value);
    // set the SmokeCurve array (default: {2.3,0.53,-0.44})
    void setSmokeCurve(float *value);
    // define what to do at each stage of the sketch
    void onBefore();
    void onSetup();
    void onLoop();
    void onReceive(const MyMessage & message);
    void onProcess(Request & request);
  protected:
    float _rl_value = 1.0;
    float _ro_clean_air_factor = 9.83;
    int _calibration_sample_times = 50;
    int _calibration_sample_interval = 500;
    int _read_sample_interval = 50;
    int _read_sample_times = 5;
    float _ro = 10000.0;
    float _LPGCurve[3] = {2.3,0.21,-0.47};
    float _COCurve[3] = {2.3,0.72,-0.34};
    float _SmokeCurve[3] = {2.3,0.53,-0.44};
    float _MQResistanceCalculation(int raw_adc);
    float _MQCalibration();
    float _MQRead();
    int _MQGetGasPercentage(float rs_ro_ratio, int gas_id);
    int  _MQGetPercentage(float rs_ro_ratio, float *pcurve);
    int _gas_lpg = 0;
    int _gas_co = 1;
    int _gas_smoke = 2;
    int _target_gas = _gas_co;
};
#endif

/***************************************
   NodeManager: manages all the aspects of the node
*/
class NodeManager {
  public:
    NodeManager();
    // [10] send the same service message multiple times (default: 1)
    void setRetries(int value);
    int getRetries();
    #if BATTERY_MANAGER == 1
      // [11] the expected vcc when the batter is fully discharged, used to calculate the percentage (default: 2.7)
      void setBatteryMin(float value);
      // [12] the expected vcc when the batter is fully charged, used to calculate the percentage (default: 3.3)
      void setBatteryMax(float value);
      // [13] after how many sleeping cycles report the battery level to the controller. When reset the battery is always reported (default: -)
      void setBatteryReportCycles(int value);
      // [14] after how many minutes report the battery level to the controller. When reset the battery is always reported (default: 60)
      void setBatteryReportMinutes(int value);
      // [15] if true, the battery level will be evaluated by measuring the internal vcc without the need to connect any pin, if false the voltage divider methon will be used (default: true)
      void setBatteryInternalVcc(bool value);
      // [16] if setBatteryInternalVcc() is set to false, the analog pin to which the battery's vcc is attached (https://www.mysensors.org/build/battery) (default: -1)
      void setBatteryPin(int value);
      // [17] if setBatteryInternalVcc() is set to false, the volts per bit ratio used to calculate the battery voltage (default: 0.003363075)
      void setBatteryVoltsPerBit(float value);
      // [18] If true, wake up by an interrupt counts as a valid cycle for battery reports otherwise only uninterrupted sleep cycles would contribute (default: true)
      void setBatteryReportWithInterrupt(bool value);
      // [2] Send a battery level report to the controller
      void batteryReport();
    #endif
    // [3] define the way the node should behave. It can be (0) IDLE (stay awake withtout executing each sensors' loop), (1) SLEEP (go to sleep for the configured interval), (2) WAIT (wait for the configured interval), (3) ALWAYS_ON (stay awake and execute each sensors' loop)
    void setSleepMode(int value);
    void setMode(int value);
    int getMode();
    // [4] define for how long the board will sleep (default: 0)
    void setSleepTime(int value);
    int getSleepTime();
    // [5] define the unit of SLEEP_TIME. It can be SECONDS, MINUTES, HOURS or DAYS (default: MINUTES)
    void setSleepUnit(int value);
    int getSleepUnit();
    // configure the node's behavior, parameters are mode, time and unit
    void setSleep(int value1, int value2, int value3);
    // [19] if enabled, when waking up from the interrupt, the board stops sleeping. Disable it when attaching e.g. a motion sensor (default: true)
    void setSleepInterruptPin(int value);
    // configure the interrupt pin and mode. Mode can be CHANGE, RISING, FALLING (default: MODE_NOT_DEFINED)
    void setInterrupt(int pin, int mode, int pull = -1);
    // [20] optionally sleep interval in milliseconds before sending each message to the radio network (default: 0)
    void setSleepBetweenSend(int value);
    int getSleepBetweenSend();
    // register a built-in sensor
    int registerSensor(int sensor_type, int pin = -1, int child_id = -1);
    // register a custom sensor
    int registerSensor(Sensor* sensor);
    // [26] un-register a sensor
    void unRegisterSensor(int sensor_index);
    // return a sensor by its index
    Sensor* get(int sensor_index);
    Sensor* getSensor(int sensor_index);
    // assign a different child id to a sensor
    bool renameSensor(int old_child_id, int new_child_id);
    #if POWER_MANAGER == 1
      // to save battery the sensor can be optionally connected to two pins which will act as vcc and ground and activated on demand
      void setPowerPins(int ground_pin, int vcc_pin, int wait_time = 50);
      // [23] if enabled the pins will be automatically powered on while awake and off during sleeping (default: true)
      void setAutoPowerPins(bool value);
      // [24] manually turn the power on
      void powerOn();
      // [25] manually turn the power off
      void powerOff();
    #endif
    // [21] set this to true if you want destination node to send ack back to this node (default: false)
    void setAck(bool value);