Agni satellite

 Agni satellite

it is a mini cube satellite it is in the size of 4x4x4 CM.

circuit diagram

 

Block diagram

code


//header file
#include "TroykaDHT.h"
#include "SPI.h"
#include "SD.h"
#include "SFE_BMP180.h"
#include "Wire.h"
//variable
DHT dht(5, DHT11);
const int chipSelect = 4;
File myFile;
SFE_BMP180 pressure;

#define ALTITUDE 138

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
dht.begin();

while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("initialization failed!");
while (1);
}
Serial.println("initialization done.");


// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.

if (pressure.begin())

Serial.println("BMP180 init success");
else

{

Serial.println("BMP180 init fail\n\n");

Serial.println("Check connection");

while (1);

}

}

void loop() {

// put your main code here, to run repeatedly:
dht.read();
char status;

double T, P, p0, a;
myFile = SD.open("data.txt", FILE_WRITE);


// if the file opened okay, write to it:

if (myFile) {

Serial.print("Writing to test.txt...");

Serial.print("Temperature = ");

myFile.println(dht.getTemperatureC());

Serial.println(" C \t");

Serial.print("Temperature = ");

myFile.println(dht.getTemperatureK());

Serial.println(" K \t");
Serial.print("Humidity = ");

myFile.println(dht.getHumidity());

Serial.println(" %");

myFile.print("absolute pressure: ");

myFile.print(P, 2);

myFile.print(" hpa = ");

myFile.print(P * 100, 2);

myFile.print(" pa = ");

myFile.print(P * 0.000986923, 2);

myFile.print(" atm = ");

myFile.print(P * 0.750063755, 2);

myFile.print(" mmHg = ");

myFile.print(P * 0.750061683, 2);

myFile.print(" torr = ");

myFile.print(P * 0.014503774, 2);

myFile.println(" psi");

p0 = pressure.sealevel(P, ALTITUDE); // we're at 943.7 meters

myFile.print("relative (sea-level) pressure: ");
myFile.print(p0, 2);

myFile.println(" hpa ");;

a = pressure.altitude(P, p0);

myFile.print("your altitude: ");

myFile.print(a, 0);

myFile.println(" meters ");

delay(2000);

// close the file:

myFile.close();

Serial.println("done.");

} else {

// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}