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	- Project: Motion Transmitter
	- Source Code NOT compiled for: ESP32 DevKit V1
	- Source Code created on: 2025-11-21 04:56:21

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* The sensor is an ADXL335, which will send its */
	/* information via Bluetooth to the ESP32. The ESP32 */
	/* will then pass the data read by LabVIEW. This code */
	/* will only be used by an ESP32 to function. */
/****** END SYSTEM REQUIREMENTS *****/


/* START CODE */

// Includes for Bluetooth and sensor communication
#include 

// Create a Bluetooth Serial object
BluetoothSerial SerialBT;

// Variables for ADC readings from ADXL335
int xAxisPin = 34; // GPIO pin for X-axis
int yAxisPin = 35; // GPIO pin for Y-axis
int zAxisPin = 32; // GPIO pin for Z-axis

// Variables to store sensor data
float xAxisVoltage, yAxisVoltage, zAxisVoltage;

// Variable declarations for Bluetooth data
String receivedData = "";

// Setup function
void setup() {
  Serial.begin(115200); // Start serial communication at 115200 baud rate
  SerialBT.begin("ESP32_ADXL335_BT"); // Bluetooth device name
  // Initialize ADC pins
  pinMode(xAxisPin, INPUT);
  pinMode(yAxisPin, INPUT);
  pinMode(zAxisPin, INPUT);
}

// Loop function
void loop() {
  // Read ADC values
  int xValue = analogRead(xAxisPin);
  int yValue = analogRead(yAxisPin);
  int zValue = analogRead(zAxisPin);

  // Convert ADC values to voltages (assuming 3.3V ADC reference)
  xAxisVoltage = xValue * 3.3 / 4095.0;
  yAxisVoltage = yValue * 3.3 / 4095.0;
  zAxisVoltage = zValue * 3.3 / 4095.0;

  // Create a JSON-like string to send
  String sensorData = String("{\"X\":") + String(xAxisVoltage, 2) + ",\"Y\":" + String(yAxisVoltage, 2) + ",\"Z\":" + String(zAxisVoltage, 2) + "}";

  // Send data via Bluetooth
  SerialBT.println(sensorData);

  // Check for incoming Bluetooth data
  if (SerialBT.available()) {
    receivedData = SerialBT.readStringUntil('\n');
    // Process received data if needed
  }

  delay(100); // Delay of 100ms
}

/* END CODE */