diff --git a/sender_module_final/sender_module_final.ino b/sender_module_final/sender_module_final.ino
new file mode 100644
index 0000000..e70bf78
--- /dev/null
+++ b/sender_module_final/sender_module_final.ino
@@ -0,0 +1,188 @@
+#include <SPI.h>
+#include <SD.h>
+
+#include "Arduino_BMI270_BMM150.h"
+#include <nRF24L01.h>
+#include <RF24.h>
+
+// Define pin numbers for modules
+const int NRF_CE_PIN = 9;
+const int NRF_CS_PIN = 8;
+const byte address[6] = "00001";
+
+const int BUZZER_PIN = 7;
+const int READY_STAGE_PIN = 5;
+const int LAUNCH_STAGE_PIN = 6;
+
+// Create objects for modules
+RF24 radio(NRF_CE_PIN, NRF_CS_PIN);
+File dataFile;
+
+// Flight stages
+enum FlightStage {
+  READY,
+  ARM,
+  ASCENT,
+  DESCENT,
+  LANDED
+};
+
+FlightStage current_stage = READY;
+
+void setup() {
+  // Initialize Serial
+  Serial.begin(115200);
+  
+  while (!Serial);
+    Serial.println("# Welcome to CobraV2 operating system for rocket");
+  delay(1000);
+
+  // Buzzer pin
+  pinMode(BUZZER_PIN, OUTPUT);
+  pinMode(READY_STAGE_PIN, INPUT); 
+  
+  // Start with preflight stage
+  current_stage = READY;
+
+  delay(1000);
+}
+
+void loop() {
+  switch (current_stage) {
+    case READY:
+      ready_stage();
+      break;
+    case ARM:
+      arm_stage();
+      break;
+    case ASCENT:
+      //ascent_stage();
+      break;
+    case DESCENT:
+      //descent_stage();
+      break;
+    case LANDED:
+      //landed_stage();
+      break;
+  }
+}
+
+bool isButtonPressed(int buttonPin) { return digitalRead(buttonPin) == HIGH;}
+
+void ready_stage() {
+  Serial.println("# READY stage");
+  int counter = 0;
+  const int buttonPin = 2; 
+
+  while (true) {
+    if (isButtonPressed(buttonPin)) {
+    Serial.println("Button is pressed!"); 
+    break;
+  } else {
+    Serial.println("Button is not pressed."); 
+  }
+  delay(100);
+  }
+
+  current_stage = ARM;
+}
+
+void arm_stage() {
+  // System check
+  // Block parachute ejection
+  // Wait for launch pin removed
+  // Start sending data
+  Serial.println("# ARM stage");
+
+  // Radio
+  if (!radio.begin()) {
+    Serial.println("# Fail nRF24L01 init");
+  } else {
+    radio.openWritingPipe(address);
+    radio.stopListening();  // Set module as transmitter
+    const char msg[] = "# Radio connection activated";
+    radio.write(&msg, sizeof(msg));
+    Serial.println("# Success nRF24L01 init");
+  }
+  
+  // SD card
+  if (!SD.begin(4)) {
+    Serial.println("# Fail SD module init");
+  } else {
+    Serial.println("# Success SD module init");
+  }
+
+  if (SD.exists("data.txt")) {
+    Serial.println("# File exists");
+  } else {
+    Serial.println("# File does not exist");
+  }
+
+  dataFile = SD.open("data.txt", FILE_WRITE);
+  if (dataFile) {
+    Serial.println("# File opened");
+    dataFile.println("# CobraV2 flight data");
+  } else {
+    Serial.println("# Error opening file");
+  }
+
+  // Buzzer
+  tone(BUZZER_PIN, 1000);
+  delay(1000);
+  noTone(BUZZER_PIN);
+  
+  // Accelerometer Gyroscope
+  if (!IMU.begin()) {
+    Serial.println("Failed to initialize IMU!");
+    while (1);
+  }
+
+  Serial.print("Accelerometer sample rate = ");
+  Serial.print(IMU.accelerationSampleRate());
+  Serial.println(" Hz");
+  
+  // Accelerometer Gyroscope
+  int counter = 0;
+  float x, y, z;
+
+  while (true) {
+    if (IMU.accelerationAvailable()) {
+      IMU.readAcceleration(x, y, z);
+
+      Serial.println(x);
+      if ( x > 1) {
+        Serial.println("# Launch Detect");
+        counter++;
+      }
+    }
+
+    if (counter > 10) {
+      Serial.println("# Launching");
+      break;
+    }
+  }
+
+  current_stage = ASCENT;
+}
+
+void ascent_stage() {
+  // Launch
+  // Start sending and saving data on SD card
+  // Check for apogee
+  // Eject parachute
+}
+
+void descent_stage() {
+  // Detect apogee with accelerometer
+  // Eject parachute
+  // GPS and height check
+}
+
+void landed_stage() {
+  // Check for zero velocity
+  // Shut down unneeded systems
+  // Buzz on
+  // Send GPS location
+  // Battery check
+  // Turn off gyro and accelerometer
+}