Sorry for my poor english im french.
They havent solution for use only the tx/rx pin on both raspberry pi and arduino?

Ok thx, but i think it's could be possible to use it TX/RX pin on arduino. It's transparent wireless communication.

Hi all. I have a question.
Can i use drf1278dm with it ?
Best regards

@bgunnarb you are find the problem, i think i have arduino pro mini 3.3V but it's 5V. Thx very much it's work better now :)

Yes ^^ . can you give me at snyp_thx at hotmail dot fr?

Have you link for older library? Are you french?

i tested with 3.3V and 5volt but same result
http://www.banggood.com/fr/GY-68-BMP180-Digital-Barometric-Pressure-Sensor-Board-Module-p-1059025.html?rmmds=myorder

I supply itwith the 3.3 V output off arduino

I bought it in banggood, but it work's before...

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP085_U.h>
   
Adafruit_BMP085_Unified bmp = Adafruit_BMP085_Unified(10085);
 
void setup(void) 
{
  Serial.begin(9600);
  Serial.println("Pressure Sensor Test"); Serial.println("");
  
  /* Initialise the sensor */
  if(!bmp.begin())
  {
    /* There was a problem detecting the BMP085 ... check your connections */
    Serial.print("Ooops, no BMP085 detected ... Check your wiring or I2C ADDR!");
    while(1);
  }
}
 
void loop(void) 
{
  /* Get a new sensor event */ 
  sensors_event_t event;
  bmp.getEvent(&event);
 
  /* Display the results (barometric pressure is measure in hPa) */
  if (event.pressure)
  {
    /* Display atmospheric pressure in hPa */
    Serial.print("Pressure: "); Serial.print(event.pressure); Serial.println(" hPa");
  }
  else
  {
    Serial.println("Sensor error");
  }
  delay(250);
}

Pressure: 756.46 hPa
Pressure: 756.47 hPa
Pressure: 756.49 hPa
Pressure: 756.44 hPa
Pressure: 756.44 hPa
Pressure: 756.46 hPa
Pressure: 756.41 hPa
Pressure: 756.44 hPa
Pressure: 756.42 hPa
Pressure: 756.39 hPa
Pressure: 756.42 hPa
Pressure: 756.44 hPa
Pressure: 756.38 hPa
Pressure: 756.40 hPa
Pressure: 756.41 hPa
Pressure: 756.38 hPa
Pressure: 756.41 hPa
Pressure: 756.40 hPa
Pressure: 756.38 hPa
Pressure: 756.40 hPa
Pressure: 756.42 hPa
Pressure: 756.34 hPa
Pressure: 756.22 hPa
Pressure: 756.33 hPa
Pressure: 756.37 hPa
Pressure: 756.38 hPa

same pressure

Ok i defined the altitude by my own (225 meters) but i have the same pressure and temperature :S

Only bmp180 connected to arduino and i have test with 3 other :s

The pressure and temperature is incorrect xD. sorry, i have 20°C in my room and the METAR of the near airport say 1016 hPa.

Hi @mfalkvidd. This is the debug output and my code

2269 MCO:REG:REQ
2277 TSF:MSG:SEND,3-3-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=0,st=OK:2
2287 TSF:MSG:READ,0-0-3,s=255,c=3,t=27,pt=1,l=1,sg=0:1
2293 MCO:PIM:NODE REG=1
2295 MCO:BGN:STP
2306 MCO:BGN:INIT OK,TSP=1
Forecast at minute 1 dP/dt = 0.00kPa/h --> unknown
Temperature = 31.00 *C
Pressure = 728.00 hPa
Forecast = unknown
2359 TSF:MSG:SEND,3-3-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:31.0
2369 TSF:MSG:SEND,3-3-0-0,s=0,c=1,t=4,pt=7,l=5,sg=0,ft=0,st=OK:728
2381 TSF:MSG:SEND,3-3-0-0,s=0,c=1,t=5,pt=0,l=7,sg=0,ft=0,st=OK:unknown
2387 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
2394 MCO:SLP:TPD

// 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 = getControllerConfig().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.readPressure() / 100 ;
    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;
}

2017-03-09 10:52:56.474 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 10:52:56.475 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 10:52:56.488 (GATEWAY) Temp (Temp)
2017-03-09 10:52:56.497 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:52:56.503 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:53:40.053 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 10:53:40.054 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 10:53:40.067 (GATEWAY) Temp (Temp)
2017-03-09 10:53:40.075 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:53:40.081 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:54:14.102 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 10:54:14.104 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 10:54:14.148 (GATEWAY) Temp (Temp)
2017-03-09 10:54:14.162 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:54:14.172 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:54:26.662 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 10:54:26.664 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 10:54:26.676 (GATEWAY) Temp (Temp)
2017-03-09 10:54:26.685 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:54:26.691 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:54:44.122 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 10:54:44.123 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 10:54:44.136 (GATEWAY) Temp (Temp)
2017-03-09 10:54:44.145 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:54:44.150 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:54:50.417 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 10:54:51.225 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 10:54:51.227 (GATEWAY) Temp (Temp)
2017-03-09 10:54:51.236 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:54:51.242 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:55:55.513 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:58:05.600 (GATEWAY) Temp (Temp)
2017-03-09 10:58:05.608 (GATEWAY) General/Barometer (Baro)
2017-03-09 10:59:10.651 (GATEWAY) Temp (Temp)
2017-03-09 11:01:20.704 (GATEWAY) Temp (Temp)
2017-03-09 11:02:00.701 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 11:02:00.702 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 11:02:00.715 (GATEWAY) Temp (Temp)
2017-03-09 11:02:00.723 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:02:00.728 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:02:31.650 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 11:02:31.652 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 11:02:31.664 (GATEWAY) Temp (Temp)
2017-03-09 11:02:31.673 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:02:31.678 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:02:38.872 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 11:02:38.873 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 11:02:38.886 (GATEWAY) Temp (Temp)
2017-03-09 11:02:38.894 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:02:38.900 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:02:41.863 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 11:02:41.864 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 11:02:41.887 (GATEWAY) Temp (Temp)
2017-03-09 11:02:41.895 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:02:41.901 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:02:49.208 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 11:02:49.209 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 11:02:49.232 (GATEWAY) Temp (Temp)
2017-03-09 11:02:49.240 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:02:49.245 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:03:54.286 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:04:59.319 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:06:04.359 (GATEWAY) Temp (Temp)
2017-03-09 11:06:04.368 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:06:36.109 MySensors: Node: 3, Sketch Name: Pressure Sensor
2017-03-09 11:06:36.111 MySensors: Node: 3, Sketch Version: 1.1
2017-03-09 11:06:36.123 (GATEWAY) Temp (Temp)
2017-03-09 11:06:36.132 (GATEWAY) General/Barometer (Baro)
2017-03-09 11:06:36.137 (GATEWAY) General/Barometer (Baro)

Hi, i've a problem with the bmp180 with domoticz. I use raspberry pi with domoticz and mysensor v2 and nrf24 on gpio, i receive data but i think is wrong. The temperature is 31°C and pressure is 728. I put my altitude in the sketch.
Can you help me?
Best regards.