Best posts made by DannyM

DannyM

I did what you tried to do, and it worked, also in Domoticz two temps are visible.

This is my code:

/**
 * 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
 * Toegevoegd: na 10x dezelfde waarde te hebben gelezen bij TeEmp en Hum toch een waarde aan de GW sturen.
 */
 
#include <SPI.h>
#include <Wire.h>
#include <DHT.h>  
#include <MySensor.h>  
#include <Adafruit_BMP085.h>

static const uint8_t FORCE_UPDATE_N_READS = 10;
uint8_t nNoUpdatesTemp;
uint8_t nNoUpdatesHum;

#define BARO_CHILD 0
#define TEMP_CHILD 1
#define CHILD_ID_HUM 2
#define CHILD_ID_TEMP 3

#define HUMIDITY_SENSOR_DIGITAL_PIN 3

const float ALTITUDE = 1.05; // <-- 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[] = { "stabiel", "zonnig", "bewolkt", "onstabiel", "onweer", "onbekend" };
enum FORECAST
{
	STABIEL = 0,		// "Stable Weather Pattern"
	ZONNIG = 1,			// "Slowly rising Good Weather", "Clear/Sunny "
	BEWOLKT = 2,		// "Slowly falling L-Pressure ", "BEWOLKT/Rain "
	ONSTABIEL = 3,	// "Quickly rising H-Press",     "Not Stable"
	ONWEER = 4,	    // "Quickly falling L-Press",    "ONWEER"
	ONBEKEND = 5		// "ONBEKEND (More Time needed)
};

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

float lastPressure = -1;
float lastTempBMP = -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;

DHT dht;
float lastTempDHT;
float lastHum;

boolean metric = true; 

MyMessage tempMsg(TEMP_CHILD, V_TEMP);
MyMessage pressureMsg(BARO_CHILD, V_PRESSURE);
MyMessage forecastMsg(BARO_CHILD, V_FORECAST);
MyMessage msgHum(CHILD_ID_HUM, V_HUM);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);

void setup() 
{
	gw.begin();
  dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 

	// Send the sketch version information to the gateway and Controller
	
	gw.sendSketchInfo("BaroHum", "2.0");

	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);
  gw.present(CHILD_ID_HUM, S_HUM);
  gw.present(CHILD_ID_TEMP, S_TEMP);
 
	metric = gw.getConfig().isMetric;
}

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

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

	int forecast = sample(pressure);

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


	if (temperatureBMP != lastTempBMP) 
	{
		gw.send(tempMsg.set(temperatureBMP, 1));
		lastTempBMP = temperatureBMP;
	}

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

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

  delay(dht.getMinimumSamplingPeriod());

float temperatureDHT = dht.getTemperature();
  if (isnan(temperatureDHT)) {
      Serial.println("Failed reading temperature from DHT");
  } else if (temperatureDHT != lastTempDHT  || nNoUpdatesTemp == FORCE_UPDATE_N_READS) {
    lastTempDHT = temperatureDHT;
    if (!metric) {
      temperatureDHT = dht.toFahrenheit(temperatureDHT);
    }
    nNoUpdatesTemp = 0;
    gw.send(msgTemp.set(temperatureDHT, 1));
    Serial.print("T: ");
    Serial.println(temperatureDHT);
  } else {
    // Increase no update counter if the temperature stayed the same
    nNoUpdatesTemp++;
  }
  
  float humidity = dht.getHumidity();
  if (isnan(humidity)) {
      Serial.println("Failed reading humidity from DHT");
  } else if (humidity != lastHum  || nNoUpdatesHum == FORCE_UPDATE_N_READS) {
      lastHum = humidity;

      nNoUpdatesHum = 0;
      gw.send(msgHum.set(humidity, 1));
      Serial.print("H: ");
      Serial.println(humidity);
  } else {
    // Increase no update counter if the temperature stayed the same
    nNoUpdatesHum++;
  }

	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 = ONBEKEND;
	if (minuteCount < 35 && firstRound) //if time is less than 35 min on the first 3 hour interval.
	{
		forecast = ONBEKEND;
	}
	else if (dP_dt < (-0.25))
	{
		forecast = ONWEER;
	}
	else if (dP_dt > 0.25)
	{
		forecast = ONSTABIEL;
	}
	else if ((dP_dt > (-0.25)) && (dP_dt < (-0.05)))
	{
		forecast = BEWOLKT;
	}
	else if ((dP_dt > 0.05) && (dP_dt < 0.25))
	{
		forecast = ZONNIG;
	}
	else if ((dP_dt >(-0.05)) && (dP_dt < 0.05))
	{
		forecast = STABIEL;
	}
	else
	{
		forecast = ONBEKEND;
	}

	// 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;
}
/**
 * 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
 * Toegevoegd: na 10x dezelfde waarde te hebben gelezen bij TeEmp en Hum toch een waarde aan de GW sturen.
 */
 
#include <SPI.h>
#include <Wire.h>
#include <DHT.h>  
#include <MySensor.h>  
#include <Adafruit_BMP085.h>

static const uint8_t FORCE_UPDATE_N_READS = 10;
uint8_t nNoUpdatesTemp;
uint8_t nNoUpdatesHum;

#define BARO_CHILD 0
#define TEMP_CHILD 1
#define CHILD_ID_HUM 2
#define CHILD_ID_TEMP 3

#define HUMIDITY_SENSOR_DIGITAL_PIN 3

const float ALTITUDE = 1.05; // <-- 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[] = { "stabiel", "zonnig", "bewolkt", "onstabiel", "onweer", "onbekend" };
enum FORECAST
{
	STABIEL = 0,		// "Stable Weather Pattern"
	ZONNIG = 1,			// "Slowly rising Good Weather", "Clear/Sunny "
	BEWOLKT = 2,		// "Slowly falling L-Pressure ", "BEWOLKT/Rain "
	ONSTABIEL = 3,	// "Quickly rising H-Press",     "Not Stable"
	ONWEER = 4,	    // "Quickly falling L-Press",    "ONWEER"
	ONBEKEND = 5		// "ONBEKEND (More Time needed)
};

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

float lastPressure = -1;
float lastTempBMP = -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;

DHT dht;
float lastTempDHT;
float lastHum;

boolean metric = true; 

MyMessage tempMsg(TEMP_CHILD, V_TEMP);
MyMessage pressureMsg(BARO_CHILD, V_PRESSURE);
MyMessage forecastMsg(BARO_CHILD, V_FORECAST);
MyMessage msgHum(CHILD_ID_HUM, V_HUM);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);

void setup() 
{
	gw.begin();
  dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 

	// Send the sketch version information to the gateway and Controller
	
	gw.sendSketchInfo("BaroHum", "2.0");

	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);
  gw.present(CHILD_ID_HUM, S_HUM);
  gw.present(CHILD_ID_TEMP, S_TEMP);
 
	metric = gw.getConfig().isMetric;
}

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

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

	int forecast = sample(pressure);

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


	if (temperatureBMP != lastTempBMP) 
	{
		gw.send(tempMsg.set(temperatureBMP, 1));
		lastTempBMP = temperatureBMP;
	}

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

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

  delay(dht.getMinimumSamplingPeriod());

float temperatureDHT = dht.getTemperature();
  if (isnan(temperatureDHT)) {
      Serial.println("Failed reading temperature from DHT");
  } else if (temperatureDHT != lastTempDHT  || nNoUpdatesTemp == FORCE_UPDATE_N_READS) {
    lastTempDHT = temperatureDHT;
    if (!metric) {
      temperatureDHT = dht.toFahrenheit(temperatureDHT);
    }
    nNoUpdatesTemp = 0;
    gw.send(msgTemp.set(temperatureDHT, 1));
    Serial.print("T: ");
    Serial.println(temperatureDHT);
  } else {
    // Increase no update counter if the temperature stayed the same
    nNoUpdatesTemp++;
  }
  
  float humidity = dht.getHumidity();
  if (isnan(humidity)) {
      Serial.println("Failed reading humidity from DHT");
  } else if (humidity != lastHum  || nNoUpdatesHum == FORCE_UPDATE_N_READS) {
      lastHum = humidity;

      nNoUpdatesHum = 0;
      gw.send(msgHum.set(humidity, 1));
      Serial.print("H: ");
      Serial.println(humidity);
  } else {
    // Increase no update counter if the temperature stayed the same
    nNoUpdatesHum++;
  }

	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 = ONBEKEND;
	if (minuteCount < 35 && firstRound) //if time is less than 35 min on the first 3 hour interval.
	{
		forecast = ONBEKEND;
	}
	else if (dP_dt < (-0.25))
	{
		forecast = ONWEER;
	}
	else if (dP_dt > 0.25)
	{
		forecast = ONSTABIEL;
	}
	else if ((dP_dt > (-0.25)) && (dP_dt < (-0.05)))
	{
		forecast = BEWOLKT;
	}
	else if ((dP_dt > 0.05) && (dP_dt < 0.25))
	{
		forecast = ZONNIG;
	}
	else if ((dP_dt >(-0.05)) && (dP_dt < 0.05))
	{
		forecast = STABIEL;
	}
	else
	{
		forecast = ONBEKEND;
	}

	// 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;
}

DannyM

@Reza

Hi, for question 2, you can go to this url on this website, everything is explained thee.
vera#including-new-sensors

You only have to startup your device two times, after initiate a start in the Vera Mysensors plugin.

For question 2; you can use a usb to telephone charger for it too..

DannyM

Yes, that did it,

Thanks @sundberg84 and @TheoL for your time..

DannyM

@TheoL I use a telephone charger most of the time, I'm a beginner with all.
Hope to make this a battery oparated sensor, will search for the components you mentioned.

thanks

DannyM

@MLs

Hi, thanks for your input, whit setup of the pins you used I have no more failed to read from DHT sensors in my serial monitor.

Now I need to revise my sketch, so it will send correct values.

Thanks again!

DannyM

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