HARDWARE REQUIRED

HARDWARE REQUIRED

SOFTWARE REQUIRED

Arduino IDE 1.8.5 (programmable platform for Arduino)

Click To Download: https://www.arduino.cc/en/Main/Software

SPECIFICATIONS

Big SD Card Module

The SD Card Module is a simple solution for transferring data to and from a standard SD card.This module has SPI interface which is compatible with any SD card and it use 5V or 3.3V power supply which is compatible with Arduino UNO/Mega.SD module has various applications such as data logger, audio, video, graphics.

Operating voltage 5V
SPI Communication method
SD card Socket
Supports FAT16 and FAT32
Break out board for standard SD card.
Contains a switch to select the flash card slot
Sits directly on a Arduino
Also be used with other microcontrollers

BMP180 Pressure and Temperature sensor

This pressure sensor is a BMP-180 based digital barometric pressure sensor module and is functional compatible with older BMP-085 digital pressure sensor with less power consumption smaller in size and more accurate.

Supply Voltage:1.8V to 3.6V
Low power consumption:0.5uA at 1Hz
I2C interface
Max I2C Speed: 3.5Mhz
Pressure Range: 300hPa to 1100hPa (+9000m to -500m)

CIRCUIT CONNECTION

The BMP180 is connected to the arduino as follows:

Once you have the BMP180 connected, test and make sure your code is working, and you are getting good pressure and temperature readings. Once that is working, you are ready to connect your SD card Reader/Writer.

The SD card reader should be connected as follows:

LIBRARY & CODE

Install this library as follows: Sketch -> Include Library -> add .zip Library

https://drive.google.com/open?id=14XeOIpZXd5gEfq7_N0y3rpAMTRr1ZpnK

SPI:Inbuilt Library you can add this using IDE

Sketch -> Include Library -> Manage Library -> Search for SPI -> Install the latest version

Click to downloadhttps://drive.google.com/open?id=1sYq1UCDgBf1_Njkg8Bt7_R2rq1u0ghpC

WIRE

https://drive.google.com/open?id=1Ej-R75OikJAlHrj275zYvKNzDN3cm0zi

BMP180

https://drive.google.com/open?id=1MehZlFQpO_HgZFF5hOCNnV4nr4NlHjj_

Click to see the code or copy the link :

https://drive.google.com/open?id=1Bz3csaVULx0ruUnG9MKlFk7c1oWclp_J

#include <SD.h> //Load SD card library

#include<SPI.h> //Load SPI Library

#include “Wire.h” // imports the wire library for talking over I2C

#include “Adafruit_BMP085.h” // import the Pressure Sensor Library We are using Version one of Adafruit API for this sensor

Adafruit_BMP085 mySensor; // create sensor object called mySensor

float tempC; // Variable for holding temp in C

float tempF; // Variable for holding temp in F

float pressure; //Variable for holding pressure reading

int chipSelect = 4; //chipSelect pin for the SD card Reader

File mySensorData; //Data object you will write your sesnor data to

void setup(){

Serial.begin(9600); //turn on serial monitor

mySensor.begin(); //initialize pressure sensor mySensor

pinMode(10, OUTPUT); //Must declare 10 an output and reserve it

SD.begin(4); //Initialize the SD card reader

}

void loop() {

tempC = mySensor.readTemperature(); // Read Temperature from BMP180

tempF = tempC*1.8 + 32.; // Convert degrees C to F

pressure=mySensor.readPressure(); //Read Pressure

mySensorData = SD.open(“PTData.txt”, FILE_WRITE);

if (mySensorData) {

Serial.print(“The Temp is: “); //Print Your results

Serial.print(tempF);

Serial.println(” degrees F”);

Serial.print(“The Pressure is: “);

Serial.print(pressure);

Serial.println(” Pa.”);

Serial.println(“”);

delay(250); //Pause between readings.

mySensorData.print(tempF); //write temperature data to card

mySensorData.print(“,”); //write a commma

mySensorData.println(pressure); //write pressure and end the line (println)

mySensorData.close(); //close the file

}

WORKING

If you have the BMP180 and the SD card connected correctly, this should create a file called PTData.txt on the card, and write comma delimited data to the file. Note that if the file does not exist on the card, the command:

mySensorData = SD.open(“PTData.txt”, FILE_WRITE);

will create the file. If the file already exists, this command will append data to the existing file. If you want to start with a clean new data set, erase the old PTData file.

When you run the program, you end up with a PTData.txt file on the SD card. When you have finished logging your data, you can pop the card out, put it into your PC, and then import the data into excel. You should now be able to plot, graph or analyze the data using all the powerful features of Excel.

If you want to see the saved file(reading of BMP180) , the saved data reading will be stored in SD Card .so to see the file go to MY COMPUTER then you will see the location as given in image below (USB Drive (F:))