All Purpose
Car Dashboard

// Background thread — reads serial into queue
private void ReadSerial() {
  while (keepReading && serialPort.IsOpen) {
    try {
      string response = serialPort.ReadLine().Trim();
      response = response.Replace(">", "").Trim();
      lock (queueLock) { dataQueue.Enqueue(response); }
    }
    catch (TimeoutException) { /* ECU slow — skip */ }
  }
}

// Main thread — drain queue, send next PID
void Update() {
  lock (queueLock) {
    while (dataQueue.Count > 0)
      ProcessOBDData(dataQueue.Dequeue());
  }
  if (Time.frameCount % 3 == 0 && BothActive)
    SendCommand();
}

// RPM parse: bytes[0]="41" bytes[1]="0C"
int A = Convert.ToInt32(bytes[2], 16);
int B = Convert.ToInt32(bytes[3], 16);
rpm = ((A * 256) + B) / 4;

// Gear estimation — CarMath.cs
float[] gearRatios = {
  3.636f, 2.235f, 1.590f,
  1.137f, 0.971f, 0.756f
};
float finalDrive    = 3.90f;
float circumference = 80.7f; // inches

void GearCalc() {
  if (mph == 0 || (rpm <= 1000 && mph > 5))
    { gear = 0; return; } // Neutral

  float wheelspeed = mph * 5280 * 12 / 60f;
  float wheelrpm   = wheelspeed / circumference;
  float ratio      = (rpm / wheelrpm) / finalDrive;

  float bestDiff = float.MaxValue;
  for (int i = 0; i < gearRatios.Length; i++) {
    float diff = Mathf.Abs(ratio - gearRatios[i]);
    if (diff < bestDiff) { bestDiff = diff; gear = i + 1; }
  }
}

// Throttle — calibrated to STI pedal range
rawPedal = Mathf.Clamp(rawPedal, 30, 153);
throttleper = ((rawPedal - 30) / 123f) * 100f;

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