Agni satellite

 Agni satellite

it is a mini cube satellite it is in the size of 4x4x4 CM.The circuit includes components like the Arduino Pro Mini, BMP180, MPU6050, SD card module, DHT11, and an LED, all connected for telemetry data collection and storage. Below is the Arduino code corresponding to this setup:

circuit diagram

 

DHT11: Connect data pin to pin 2, VCC to 3.3V or 5V, and GND to ground.

MPU6050: Connect SDA to A4, SCL to A5, VCC to 3.3V or 5V, and GND to ground.

BMP180: Similar to MPU6050, connect SDA to A4 and SCL to A5.

SD Card Module: Connect CS to pin 10, MOSI to pin 11, MISO to pin 12, SCK to pin 13, VCC to 3.3V or 5V, and GND to ground.

LED: Connect it to pin 5 with a resistor in series to limit current.

Block diagram

code

#include "Wire.h"
#include "Adafruit_Sensor.h"
#include "Adafruit_BMP085.h"
#include "MPU6050.h"
#include "DHT.h"
#include "SD.h"

// Pin definitions
#define DHT_PIN 2
#define DHT_TYPE DHT11
#define LED_PIN 5
#define SD_CS_PIN 10

// Sensor objects
Adafruit_BMP085 bmp;
MPU6050 mpu;
DHT dht(DHT_PIN, DHT_TYPE);

// File object for SD card
File dataFile;

void setup() {
// Initialize Serial communication
Serial.begin(9600);

// Initialize LED pin
pinMode(LED_PIN, OUTPUT);

// Initialize DHT sensor
dht.begin();

// Initialize BMP180
if (!bmp.begin()) {
Serial.println("BMP180 initialization failed!");
while (1);
}

// Initialize MPU6050
Wire.begin();
mpu.initialize();
if (!mpu.testConnection()) {
Serial.println("MPU6050 connection failed!");
while (1);
}

// Initialize SD card
if (!SD.begin(SD_CS_PIN)) {
Serial.println("SD card initialization failed!");
while (1);
}

Serial.println("System Initialized Successfully!");
}

void loop() {
// Read DHT11 data
float humidity = dht.readHumidity();
float temperature = dht.readTemperature();

// Read BMP180 data
float pressure = bmp.readPressure() / 100.0; // Convert Pa to hPa

// Read MPU6050 data
int16_t ax, ay, az, gx, gy, gz;
mpu.getMotion6(&ax, &ay, &az, &gx, &gy, &gz);

// Blink LED
digitalWrite(LED_PIN, HIGH);
delay(100);
digitalWrite(LED_PIN, LOW);

// Log data to SD card
dataFile = SD.open("telemetry.txt", FILE_WRITE);
if (dataFile) {
dataFile.print("Temp: "); dataFile.print(temperature); dataFile.print(" C, ");
dataFile.print("Hum: "); dataFile.print(humidity); dataFile.print(" %, ");
dataFile.print("Pressure: "); dataFile.print(pressure); dataFile.print(" hPa, ");
dataFile.print("Accel: "); dataFile.print(ax); dataFile.print(", "); dataFile.print(ay); dataFile.print(", "); dataFile.print(az); dataFile.print(", ");
dataFile.print("Gyro: "); dataFile.print(gx); dataFile.print(", "); dataFile.print(gy); dataFile.print(", "); dataFile.println(gz);
dataFile.close();
Serial.println("Data logged.");
} else {
Serial.println("Error opening telemetry.txt");
}

delay(1000); // Log data every second
}