3. Conversion to mysensors 2.0 for BMP180

Conversion to mysensors 2.0 for BMP180

  • denis91

    Hi,

    Since yesteday, I has trying to convert a script for a BMP180 mysensors but I have a error.

    The old script in mysensors 1.5 is

    /**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - Henrik Ekblad
 * 
 * DESCRIPTION
 * Pressure sensor example using BMP085 module  
 * http://www.mysensors.org/build/pressure
 *
 */
 
#include <SPI.h>
#include <MySensor.h>  
#include <Wire.h>
#include <Adafruit_BMP085.h>

#define BARO_CHILD 0
#define TEMP_CHILD 1

const float ALTITUDE = 688; // <-- adapt this value to your own location's altitude.

// Sleep time between reads (in seconds). Do not change this value as the forecast algorithm needs a sample every minute.
const unsigned long SLEEP_TIME = 60000; 

const char *weather[] = { "stable", "sunny", "cloudy", "unstable", "thunderstorm", "unknown" };
enum FORECAST
{
	STABLE = 0,			// "Stable Weather Pattern"
	SUNNY = 1,			// "Slowly rising Good Weather", "Clear/Sunny "
	CLOUDY = 2,			// "Slowly falling L-Pressure ", "Cloudy/Rain "
	UNSTABLE = 3,		// "Quickly rising H-Press",     "Not Stable"
	THUNDERSTORM = 4,	// "Quickly falling L-Press",    "Thunderstorm"
	UNKNOWN = 5			// "Unknown (More Time needed)
};

Adafruit_BMP085 bmp = Adafruit_BMP085();      // Digital Pressure Sensor 
MySensor gw;

float lastPressure = -1;
float lastTemp = -1;
int lastForecast = -1;

const int LAST_SAMPLES_COUNT = 5;
float lastPressureSamples[LAST_SAMPLES_COUNT];

// this CONVERSION_FACTOR is used to convert from Pa to kPa in forecast algorithm
// get kPa/h be dividing hPa by 10 
#define CONVERSION_FACTOR (1.0/10.0)

int minuteCount = 0;
bool firstRound = true;
// average value is used in forecast algorithm.
float pressureAvg;
// average after 2 hours is used as reference value for the next iteration.
float pressureAvg2;

float dP_dt;
boolean metric;
MyMessage tempMsg(TEMP_CHILD, V_TEMP);
MyMessage pressureMsg(BARO_CHILD, V_PRESSURE);
MyMessage forecastMsg(BARO_CHILD, V_FORECAST);


void setup() 
{
	gw.begin();

	// Send the sketch version information to the gateway and Controller
	gw.sendSketchInfo("Pressure Sensor", "1.1");

	if (!bmp.begin()) 
	{
		Serial.println("Could not find a valid BMP085 sensor, check wiring!");
		while (1) {}
	}

	// Register sensors to gw (they will be created as child devices)
	gw.present(BARO_CHILD, S_BARO);
	gw.present(TEMP_CHILD, S_TEMP);
	metric = gw.getConfig().isMetric;
}

void loop() 
{
	float pressure = bmp.readSealevelPressure(ALTITUDE) / 100.0;
	float temperature = bmp.readTemperature();

	if (!metric) 
	{
		// Convert to fahrenheit
		temperature = temperature * 9.0 / 5.0 + 32.0;
	}

	int forecast = sample(pressure);

	Serial.print("Temperature = ");
	Serial.print(temperature);
	Serial.println(metric ? " *C" : " *F");
	Serial.print("Pressure = ");
	Serial.print(pressure);
	Serial.println(" hPa");
	Serial.print("Forecast = ");
	Serial.println(weather[forecast]);


	if (temperature != lastTemp) 
	{
		gw.send(tempMsg.set(temperature, 1));
		lastTemp = temperature;
	}

	if (pressure != lastPressure) 
	{
		gw.send(pressureMsg.set(pressure, 0));
		lastPressure = pressure;
	}

	if (forecast != lastForecast)
	{
		gw.send(forecastMsg.set(weather[forecast]));
		lastForecast = forecast;
	}

	gw.sleep(SLEEP_TIME);
}

float getLastPressureSamplesAverage()
{
	float lastPressureSamplesAverage = 0;
	for (int i = 0; i < LAST_SAMPLES_COUNT; i++)
	{
		lastPressureSamplesAverage += lastPressureSamples[i];
	}
	lastPressureSamplesAverage /= LAST_SAMPLES_COUNT;

	return lastPressureSamplesAverage;
}



// Algorithm found here
// http://www.freescale.com/files/sensors/doc/app_note/AN3914.pdf
// Pressure in hPa -->  forecast done by calculating kPa/h
int sample(float pressure)
{
	// Calculate the average of the last n minutes.
	int index = minuteCount % LAST_SAMPLES_COUNT;
	lastPressureSamples[index] = pressure;

	minuteCount++;
	if (minuteCount > 185)
	{
		minuteCount = 6;
	}

	if (minuteCount == 5)
	{
		pressureAvg = getLastPressureSamplesAverage();
	}
	else if (minuteCount == 35)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change * 2; // note this is for t = 0.5hour
		}
		else
		{
			dP_dt = change / 1.5; // divide by 1.5 as this is the difference in time from 0 value.
		}
	}
	else if (minuteCount == 65)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) //first time initial 3 hour
		{
			dP_dt = change; //note this is for t = 1 hour
		}
		else
		{
			dP_dt = change / 2; //divide by 2 as this is the difference in time from 0 value
		}
	}
	else if (minuteCount == 95)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change / 1.5; // note this is for t = 1.5 hour
		}
		else
		{
			dP_dt = change / 2.5; // divide by 2.5 as this is the difference in time from 0 value
		}
	}
	else if (minuteCount == 125)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		pressureAvg2 = lastPressureAvg; // store for later use.
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change / 2; // note this is for t = 2 hour
		}
		else
		{
			dP_dt = change / 3; // divide by 3 as this is the difference in time from 0 value
		}
	}
	else if (minuteCount == 155)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change / 2.5; // note this is for t = 2.5 hour
		}
		else
		{
			dP_dt = change / 3.5; // divide by 3.5 as this is the difference in time from 0 value
		}
	}
	else if (minuteCount == 185)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change / 3; // note this is for t = 3 hour
		}
		else
		{
			dP_dt = change / 4; // divide by 4 as this is the difference in time from 0 value
		}
		pressureAvg = pressureAvg2; // Equating the pressure at 0 to the pressure at 2 hour after 3 hours have past.
		firstRound = false; // flag to let you know that this is on the past 3 hour mark. Initialized to 0 outside main loop.
	}

	int forecast = UNKNOWN;
	if (minuteCount < 35 && firstRound) //if time is less than 35 min on the first 3 hour interval.
	{
		forecast = UNKNOWN;
	}
	else if (dP_dt < (-0.25))
	{
		forecast = THUNDERSTORM;
	}
	else if (dP_dt > 0.25)
	{
		forecast = UNSTABLE;
	}
	else if ((dP_dt > (-0.25)) && (dP_dt < (-0.05)))
	{
		forecast = CLOUDY;
	}
	else if ((dP_dt > 0.05) && (dP_dt < 0.25))
	{
		forecast = SUNNY;
	}
	else if ((dP_dt >(-0.05)) && (dP_dt < 0.05))
	{
		forecast = STABLE;
	}
	else
	{
		forecast = UNKNOWN;
	}

	// uncomment when debugging
	//Serial.print(F("Forecast at minute "));
	//Serial.print(minuteCount);
	//Serial.print(F(" dP/dt = "));
	//Serial.print(dP_dt);
	//Serial.print(F("kPa/h --> "));
	//Serial.println(weather[forecast]);

	return forecast;
}

    and my script proposed in mysensors 2.0

    /**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - Henrik Ekblad
 * 
 * DESCRIPTION
 * Pressure sensor example using BMP085 module  
 * http://www.mysensors.org/build/pressure
 *
 */

#include <MyConfig.h>
#include <SPI.h>
#include <MySensors.h> 
#include <Wire.h>
#include <Adafruit_BMP085.h>

#define BARO_CHILD 0
#define TEMP_CHILD 1

const float ALTITUDE = 688; // <-- adapt this value to your own location's altitude.

// Sleep time between reads (in seconds). Do not change this value as the forecast algorithm needs a sample every minute.
const unsigned long SLEEP_TIME = 60000; 

const char *weather[] = { "stable", "sunny", "cloudy", "unstable", "thunderstorm", "unknown" };
enum FORECAST
{
	STABLE = 0,			// "Stable Weather Pattern"
	SUNNY = 1,			// "Slowly rising Good Weather", "Clear/Sunny "
	CLOUDY = 2,			// "Slowly falling L-Pressure ", "Cloudy/Rain "
	UNSTABLE = 3,		// "Quickly rising H-Press",     "Not Stable"
	THUNDERSTORM = 4,	// "Quickly falling L-Press",    "Thunderstorm"
	UNKNOWN = 5			// "Unknown (More Time needed)
};

Adafruit_BMP085 bmp = Adafruit_BMP085();      // Digital Pressure Sensor 

float lastPressure = -1;
float lastTemp = -1;
int lastForecast = -1;

const int LAST_SAMPLES_COUNT = 5;
float lastPressureSamples[LAST_SAMPLES_COUNT];

// this CONVERSION_FACTOR is used to convert from Pa to kPa in forecast algorithm
// get kPa/h be dividing hPa by 10 
#define CONVERSION_FACTOR (1.0/10.0)

int minuteCount = 0;
bool firstRound = true;
// average value is used in forecast algorithm.
float pressureAvg;
// average after 2 hours is used as reference value for the next iteration.
float pressureAvg2;

float dP_dt;
boolean metric;
MyMessage tempMsg(TEMP_CHILD, V_TEMP);
MyMessage pressureMsg(BARO_CHILD, V_PRESSURE);
MyMessage forecastMsg(BARO_CHILD, V_FORECAST);


void presentation()  
{
//	gw.begin();

	// Send the sketch version information to the gateway and Controller
	sendSketchInfo("Pressure Sensor", "1.1");

	if (!bmp.begin()) 
	{
		Serial.println("Could not find a valid BMP085 sensor, check wiring!");
		while (1) {}
	}

	// Register sensors to gw (they will be created as child devices)
	present(BARO_CHILD, S_BARO);
	present(TEMP_CHILD, S_TEMP);
	metric = getConfig().isMetric;
}

void loop() 
{
	float pressure = bmp.readSealevelPressure(ALTITUDE) / 100.0;
	float temperature = bmp.readTemperature();

	if (!metric) 
	{
		// Convert to fahrenheit
		temperature = temperature * 9.0 / 5.0 + 32.0;
	}

	int forecast = sample(pressure);

	Serial.print("Temperature = ");
	Serial.print(temperature);
	Serial.println(metric ? " *C" : " *F");
	Serial.print("Pressure = ");
	Serial.print(pressure);
	Serial.println(" hPa");
	Serial.print("Forecast = ");
	Serial.println(weather[forecast]);


	if (temperature != lastTemp) 
	{
		send(tempMsg.set(temperature, 1));
		lastTemp = temperature;
	}

	if (pressure != lastPressure) 
	{
		send(pressureMsg.set(pressure, 0));
		lastPressure = pressure;
	}

	if (forecast != lastForecast)
	{
		send(forecastMsg.set(weather[forecast]));
		lastForecast = forecast;
	}

	sleep(SLEEP_TIME);
}

float getLastPressureSamplesAverage()
{
	float lastPressureSamplesAverage = 0;
	for (int i = 0; i < LAST_SAMPLES_COUNT; i++)
	{
		lastPressureSamplesAverage += lastPressureSamples[i];
	}
	lastPressureSamplesAverage /= LAST_SAMPLES_COUNT;

	return lastPressureSamplesAverage;
}



// Algorithm found here
// http://www.freescale.com/files/sensors/doc/app_note/AN3914.pdf
// Pressure in hPa -->  forecast done by calculating kPa/h
int sample(float pressure)
{
	// Calculate the average of the last n minutes.
	int index = minuteCount % LAST_SAMPLES_COUNT;
	lastPressureSamples[index] = pressure;

	minuteCount++;
	if (minuteCount > 185)
	{
		minuteCount = 6;
	}

	if (minuteCount == 5)
	{
		pressureAvg = getLastPressureSamplesAverage();
	}
	else if (minuteCount == 35)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change * 2; // note this is for t = 0.5hour
		}
		else
		{
			dP_dt = change / 1.5; // divide by 1.5 as this is the difference in time from 0 value.
		}
	}
	else if (minuteCount == 65)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) //first time initial 3 hour
		{
			dP_dt = change; //note this is for t = 1 hour
		}
		else
		{
			dP_dt = change / 2; //divide by 2 as this is the difference in time from 0 value
		}
	}
	else if (minuteCount == 95)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change / 1.5; // note this is for t = 1.5 hour
		}
		else
		{
			dP_dt = change / 2.5; // divide by 2.5 as this is the difference in time from 0 value
		}
	}
	else if (minuteCount == 125)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		pressureAvg2 = lastPressureAvg; // store for later use.
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change / 2; // note this is for t = 2 hour
		}
		else
		{
			dP_dt = change / 3; // divide by 3 as this is the difference in time from 0 value
		}
	}
	else if (minuteCount == 155)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change / 2.5; // note this is for t = 2.5 hour
		}
		else
		{
			dP_dt = change / 3.5; // divide by 3.5 as this is the difference in time from 0 value
		}
	}
	else if (minuteCount == 185)
	{
		float lastPressureAvg = getLastPressureSamplesAverage();
		float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
		if (firstRound) // first time initial 3 hour
		{
			dP_dt = change / 3; // note this is for t = 3 hour
		}
		else
		{
			dP_dt = change / 4; // divide by 4 as this is the difference in time from 0 value
		}
		pressureAvg = pressureAvg2; // Equating the pressure at 0 to the pressure at 2 hour after 3 hours have past.
		firstRound = false; // flag to let you know that this is on the past 3 hour mark. Initialized to 0 outside main loop.
	}

	int forecast = UNKNOWN;
	if (minuteCount < 35 && firstRound) //if time is less than 35 min on the first 3 hour interval.
	{
		forecast = UNKNOWN;
	}
	else if (dP_dt < (-0.25))
	{
		forecast = THUNDERSTORM;
	}
	else if (dP_dt > 0.25)
	{
		forecast = UNSTABLE;
	}
	else if ((dP_dt > (-0.25)) && (dP_dt < (-0.05)))
	{
		forecast = CLOUDY;
	}
	else if ((dP_dt > 0.05) && (dP_dt < 0.25))
	{
		forecast = SUNNY;
	}
	else if ((dP_dt >(-0.05)) && (dP_dt < 0.05))
	{
		forecast = STABLE;
	}
	else
	{
		forecast = UNKNOWN;
	}

	// uncomment when debugging
	//Serial.print(F("Forecast at minute "));
	//Serial.print(minuteCount);
	//Serial.print(F(" dP/dt = "));
	//Serial.print(dP_dt);
	//Serial.print(F("kPa/h --> "));
	//Serial.println(weather[forecast]);

	return forecast;
}

    When I tried to compile, Arduino said :

    Arduino : 1.6.11 (Windows 10), Carte : "Arduino Nano, ATmega328"


C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino: In function 'void loop()':

PressureSensorVDM2:112: error: 'sample' was not declared in this scope

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorvDM.ino: At global scope:

PressureSensorvDM:46: error: redefinition of 'const float ALTITUDE'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:39:13: note: 'const float ALTITUDE' previously defined here

PressureSensorvDM:49: error: redefinition of 'const long unsigned int SLEEP_TIME'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:42:21: note: 'const long unsigned int SLEEP_TIME' previously defined here

PressureSensorvDM:51: error: redefinition of 'const char* weather []'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:44:13: note: 'const char* weather [6]' previously defined here

PressureSensorvDM:52: error: multiple definition of 'enum FORECAST'

PressureSensorVDM2:45: error: previous definition here

PressureSensorvDM:62: error: redefinition of 'Adafruit_BMP085 bmp'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:55:17: note: 'Adafruit_BMP085 bmp' previously declared here

PressureSensorvDM:65: error: redefinition of 'float lastPressure'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:57:7: note: 'float lastPressure' previously defined here

PressureSensorvDM:66: error: redefinition of 'float lastTemp'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:58:7: note: 'float lastTemp' previously defined here

PressureSensorvDM:67: error: redefinition of 'int lastForecast'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:59:5: note: 'int lastForecast' previously defined here

PressureSensorvDM:69: error: redefinition of 'const int LAST_SAMPLES_COUNT'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:61:11: note: 'const int LAST_SAMPLES_COUNT' previously defined here

PressureSensorvDM:70: error: redefinition of 'float lastPressureSamples [5]'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:62:7: note: 'float lastPressureSamples [5]' previously declared here

PressureSensorvDM:77: error: redefinition of 'int minuteCount'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:68:5: note: 'int minuteCount' previously defined here

PressureSensorvDM:78: error: redefinition of 'bool firstRound'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:69:6: note: 'bool firstRound' previously defined here

PressureSensorvDM:80: error: redefinition of 'float pressureAvg'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:71:7: note: 'float pressureAvg' previously declared here

PressureSensorvDM:82: error: redefinition of 'float pressureAvg2'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:73:7: note: 'float pressureAvg2' previously declared here

PressureSensorvDM:84: error: redefinition of 'float dP_dt'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:75:7: note: 'float dP_dt' previously declared here

PressureSensorvDM:85: error: redefinition of 'boolean metric'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:76:9: note: 'boolean metric' previously declared here

PressureSensorvDM:86: error: redefinition of 'MyMessage tempMsg'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:77:11: note: 'MyMessage tempMsg' previously declared here

PressureSensorvDM:87: error: redefinition of 'MyMessage pressureMsg'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:78:11: note: 'MyMessage pressureMsg' previously declared here

PressureSensorvDM:88: error: redefinition of 'MyMessage forecastMsg'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:79:11: note: 'MyMessage forecastMsg' previously declared here

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorvDM.ino: In function 'void presentation()':

PressureSensorvDM:91: error: redefinition of 'void presentation()'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:82:6: note: 'void presentation()' previously defined here

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorvDM.ino: In function 'void loop()':

PressureSensorvDM:109: error: redefinition of 'void loop()'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:101:6: note: 'void loop()' previously defined here

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorvDM.ino: In function 'float getLastPressureSamplesAverage()':

PressureSensorvDM:154: error: redefinition of 'float getLastPressureSamplesAverage()'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:145:7: note: 'float getLastPressureSamplesAverage()' previously defined here

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorvDM.ino: In function 'int sample(float)':

PressureSensorvDM:171: error: redefinition of 'int sample(float)'

C:\Users\Frédérique\Downloads\PressureSensorVDM2\PressureSensorVDM2.ino:162:5: note: 'int sample(float)' previously defined here

Utilisation de la bibliothèque MySensors-master version 2.0.0 dans le dossier: C:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master 
Utilisation de la bibliothèque SPI version 1.0 dans le dossier: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI 
Utilisation de la bibliothèque Wire version 1.0 dans le dossier: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire 
Utilisation de la bibliothèque Adafruit_BMP085_Library version 1.0.0 dans le dossier: C:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library 
exit status 1
'sample' was not declared in this scope

    Could you help me ?

    Many thanks for your help.

    Best regards.
    Denis

    0
  • hek
    Admin

    The example has already been converted:

    https://github.com/mysensors/MySensorsArduinoExamples/blob/master/examples/PressureSensor/PressureSensor.ino

    2
  • denis91

    Good Morning,

    Many thank for your help but this morning I tried your sketch proposed and I have the same problem :

    C:\Users\Frédérique\Downloads\PressureSensor\PressureSensorV2.ino\PressureSensorV2.ino.ino: In function 'void loop()':

PressureSensorV2.ino:118: error: 'sample' was not declared in this scope

    The complet return of compilation :

    Arduino : 1.6.11 (Windows 10), Carte : "Arduino Nano, ATmega328"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Frédérique\Documents\Arduino\libraries -fqbn=arduino:avr:nano:cpu=atmega328 -ide-version=10611 -build-path C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp -warnings=all -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Frédérique\Downloads\PressureSensor\PressureSensorV2.ino\PressureSensorV2.ino.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Frédérique\Documents\Arduino\libraries -fqbn=arduino:avr:nano:cpu=atmega328 -ide-version=10611 -build-path C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp -warnings=all -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\Frédérique\Downloads\PressureSensor\PressureSensorV2.ino\PressureSensorV2.ino.ino
Using board 'nano' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Detecting libraries used...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\sketch\PressureSensorV2.ino.ino.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\sketch\PressureSensorV2.ino.ino.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\sketch\PressureSensorV2.ino.ino.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src" "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\sketch\PressureSensorV2.ino.ino.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library" "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\sketch\PressureSensorV2.ino.ino.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library" "C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src\SPI.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\Wire.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library" "C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src\utility\twi.c" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "C:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library\Adafruit_BMP085.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library" "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\sketch\PressureSensorV2.ino.ino.cpp" -o "nul"
Generating function prototypes...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library" "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\sketch\PressureSensorV2.ino.ino.cpp" -o "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\preproc\ctags_target_for_gcc_minus_e.cpp"
"C:\Program Files (x86)\Arduino\tools-builder\ctags\5.8-arduino10/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\preproc\ctags_target_for_gcc_minus_e.cpp"
Compilation du croquis...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -Wall -Wextra -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire\src" "-IC:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library" "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\sketch\PressureSensorV2.ino.ino.cpp" -o "C:\Users\FRDRIQ~1\AppData\Local\Temp\build273ceb3b965055d440d88958ec10e5e6.tmp\sketch\PressureSensorV2.ino.ino.cpp.o"
C:\Users\Frédérique\Downloads\PressureSensor\PressureSensorV2.ino\PressureSensorV2.ino.ino: In function 'void loop()':

PressureSensorV2.ino:118: error: 'sample' was not declared in this scope

Utilisation de la bibliothèque SPI version 1.0 dans le dossier: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI 
Utilisation de la bibliothèque MySensors-master version 2.0.0 dans le dossier: C:\Users\Frédérique\Documents\Arduino\libraries\MySensors-master 
Utilisation de la bibliothèque Wire version 1.0 dans le dossier: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\Wire 
Utilisation de la bibliothèque Adafruit_BMP085_Library version 1.0.0 dans le dossier: C:\Users\Frédérique\Documents\Arduino\libraries\Adafruit_BMP085_Library 
exit status 1
'sample' was not declared in this scope

    Could you help me ?

    Best regards.
    Denis

    0 mfalkvidd 1 Reply
  • mfalkvidd
    Mod

    @denis91 the sample function is declared at https://github.com/mysensors/MySensorsArduinoExamples/blob/master/examples/PressureSensor/PressureSensor.ino#L168

    Could you post the full sketch? My guess is that something got damaged between downloading from github and compiling in the Arduino ide.

    0
  • denis91

    Good Morning,

    The sketch :

    /**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - Henrik Ekblad
 * 
 * DESCRIPTION
 * Pressure sensor example using BMP085 module  
 * http://www.mysensors.org/build/pressure
 *
 */

// Enable debug prints to serial monitor
#define MY_DEBUG 

// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69

#include <SPI.h>
#include <MySensors.h>  
#include <Wire.h>
#include <Adafruit_BMP085.h>

#define BARO_CHILD 0
#define TEMP_CHILD 1

const float ALTITUDE = 688; // <-- adapt this value to your own location's altitude.

// Sleep time between reads (in seconds). Do not change this value as the forecast algorithm needs a sample every minute.
const unsigned long SLEEP_TIME = 60000; 

const char *weather[] = { "stable", "sunny", "cloudy", "unstable", "thunderstorm", "unknown" };
enum FORECAST
{
  STABLE = 0,     // "Stable Weather Pattern"
  SUNNY = 1,      // "Slowly rising Good Weather", "Clear/Sunny "
  CLOUDY = 2,     // "Slowly falling L-Pressure ", "Cloudy/Rain "
  UNSTABLE = 3,   // "Quickly rising H-Press",     "Not Stable"
  THUNDERSTORM = 4, // "Quickly falling L-Press",    "Thunderstorm"
  UNKNOWN = 5     // "Unknown (More Time needed)
};

Adafruit_BMP085 bmp = Adafruit_BMP085();      // Digital Pressure Sensor 

float lastPressure = -1;
float lastTemp = -1;
int lastForecast = -1;

const int LAST_SAMPLES_COUNT = 5;
float lastPressureSamples[LAST_SAMPLES_COUNT];

// this CONVERSION_FACTOR is used to convert from Pa to kPa in forecast algorithm
// get kPa/h be dividing hPa by 10 
#define CONVERSION_FACTOR (1.0/10.0)

int minuteCount = 0;
bool firstRound = true;
// average value is used in forecast algorithm.
float pressureAvg;
// average after 2 hours is used as reference value for the next iteration.
float pressureAvg2;

float dP_dt;
bool metric;
MyMessage tempMsg(TEMP_CHILD, V_TEMP);
MyMessage pressureMsg(BARO_CHILD, V_PRESSURE);
MyMessage forecastMsg(BARO_CHILD, V_FORECAST);


void setup() 
{
  if (!bmp.begin()) 
  {
    Serial.println("Could not find a valid BMP085 sensor, check wiring!");
    while (1) {}
  }
  metric = getConfig().isMetric;
}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Pressure Sensor", "1.1");

  // Register sensors to gw (they will be created as child devices)
  present(BARO_CHILD, S_BARO);
  present(TEMP_CHILD, S_TEMP);
}

void loop() 
{
  float pressure = bmp.readSealevelPressure(ALTITUDE) / 100.0;
  float temperature = bmp.readTemperature();

  if (!metric) 
  {
    // Convert to fahrenheit
    temperature = temperature * 9.0 / 5.0 + 32.0;
  }

  int forecast = sample(pressure);

  Serial.print("Temperature = ");
  Serial.print(temperature);
  Serial.println(metric ? " *C" : " *F");
  Serial.print("Pressure = ");
  Serial.print(pressure);
  Serial.println(" hPa");
  Serial.print("Forecast = ");
  Serial.println(weather[forecast]);


  if (temperature != lastTemp) 
  {
    send(tempMsg.set(temperature, 1));
    lastTemp = temperature;
  }

  if (pressure != lastPressure) 
  {
    send(pressureMsg.set(pressure, 0));
    lastPressure = pressure;
  }

  if (forecast != lastForecast)
  {
    send(forecastMsg.set(weather[forecast]));
    lastForecast = forecast;
  }

  sleep(SLEEP_TIME);
}

float getLastPressureSamplesAverage()
{
  float lastPressureSamplesAverage = 0;
  for (int i = 0; i < LAST_SAMPLES_COUNT; i++)
  {
    lastPressureSamplesAverage += lastPressureSamples[i];
  }
  lastPressureSamplesAverage /= LAST_SAMPLES_COUNT;

  return lastPressureSamplesAverage;
}



// Algorithm found here
// http://www.freescale.com/files/sensors/doc/app_note/AN3914.pdf
// Pressure in hPa -->  forecast done by calculating kPa/h
int sample(float pressure)
{
  // Calculate the average of the last n minutes.
  int index = minuteCount % LAST_SAMPLES_COUNT;
  lastPressureSamples[index] = pressure;

  minuteCount++;
  if (minuteCount > 185)
  {
    minuteCount = 6;
  }

  if (minuteCount == 5)
  {
    pressureAvg = getLastPressureSamplesAverage();
  }
  else if (minuteCount == 35)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change * 2; // note this is for t = 0.5hour
    }
    else
    {
      dP_dt = change / 1.5; // divide by 1.5 as this is the difference in time from 0 value.
    }
  }
  else if (minuteCount == 65)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) //first time initial 3 hour
    {
      dP_dt = change; //note this is for t = 1 hour
    }
    else
    {
      dP_dt = change / 2; //divide by 2 as this is the difference in time from 0 value
    }
  }
  else if (minuteCount == 95)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change / 1.5; // note this is for t = 1.5 hour
    }
    else
    {
      dP_dt = change / 2.5; // divide by 2.5 as this is the difference in time from 0 value
    }
  }
  else if (minuteCount == 125)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    pressureAvg2 = lastPressureAvg; // store for later use.
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change / 2; // note this is for t = 2 hour
    }
    else
    {
      dP_dt = change / 3; // divide by 3 as this is the difference in time from 0 value
    }
  }
  else if (minuteCount == 155)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change / 2.5; // note this is for t = 2.5 hour
    }
    else
    {
      dP_dt = change / 3.5; // divide by 3.5 as this is the difference in time from 0 value
    }
  }
  else if (minuteCount == 185)
  {
    float lastPressureAvg = getLastPressureSamplesAverage();
    float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR;
    if (firstRound) // first time initial 3 hour
    {
      dP_dt = change / 3; // note this is for t = 3 hour
    }
    else
    {
      dP_dt = change / 4; // divide by 4 as this is the difference in time from 0 value
    }
    pressureAvg = pressureAvg2; // Equating the pressure at 0 to the pressure at 2 hour after 3 hours have past.
    firstRound = false; // flag to let you know that this is on the past 3 hour mark. Initialized to 0 outside main loop.
  }

  int forecast = UNKNOWN;
  if (minuteCount < 35 && firstRound) //if time is less than 35 min on the first 3 hour interval.
  {
    forecast = UNKNOWN;
  }
  else if (dP_dt < (-0.25))
  {
    forecast = THUNDERSTORM;
  }
  else if (dP_dt > 0.25)
  {
    forecast = UNSTABLE;
  }
  else if ((dP_dt > (-0.25)) && (dP_dt < (-0.05)))
  {
    forecast = CLOUDY;
  }
  else if ((dP_dt > 0.05) && (dP_dt < 0.25))
  {
    forecast = SUNNY;
  }
  else if ((dP_dt >(-0.05)) && (dP_dt < 0.05))
  {
    forecast = STABLE;
  }
  else
  {
    forecast = UNKNOWN;
  }

  // uncomment when debugging
  //Serial.print(F("Forecast at minute "));
  //Serial.print(minuteCount);
  //Serial.print(F(" dP/dt = "));
  //Serial.print(dP_dt);
  //Serial.print(F("kPa/h --> "));
  //Serial.println(weather[forecast]);

  return forecast;
}

    Many thanks for your help.

    Best regards.
    Denis

    0 mfalkvidd 1 Reply
  • mfalkvidd
    Mod

    @denis91 the sketch compiles fine for me:

    Using library SPI at version 1.0 in folder: E:\ArduinoIDE\hardware\arduino\avr\libraries\SPI 
Using library MySensors at version 2.0.0 in folder: C:\Users\Mikael\Documents\Arduino\libraries\MySensors 
Using library Wire at version 1.0 in folder: E:\ArduinoIDE\hardware\arduino\avr\libraries\Wire 
Using library Adafruit_BMP085 in folder: C:\Users\Mikael\Documents\Arduino\libraries\Adafruit_BMP085 (legacy)

Sketch uses 22,330 bytes (72%) of program storage space. Maximum is 30,720 bytes.
Global variables use 955 bytes (46%) of dynamic memory, leaving 1,093 bytes for local variables. Maximum is 2,048 bytes.

    So the problem seems to be with your installation of the Arduino IDE. Reinstalling the IDE might be the easiest option.

    0
  • denis91

    OK. I left my home during this weekend but I will try monday and then I will communicate you the result 🙂

    Have a nice weekend.
    Denis

    0
  • tlpeter

    I just installed my own type of weather station with a BMP180 and the 2.0 sketch works fine.
    I think you are doing something wrong 😄

    0
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