// Input Device Test Code - Potentiometer Throttle Calibration
const int SENSOR_PIN = 2; // GPIO2 (ADC1_CH2)

// Calibrated raw ADC limits
const int CAL_MIN = 620;  // Value at rest (0%)
const int CAL_MAX = 3470; // Value at full press (100%)

// Software low-pass filter variables
float filteredValue = 0;
const float alpha = 0.2; // Filter coefficient (0.0 to 1.0)

void setup() {
  Serial.begin(115200);
  analogReadResolution(12); // Configure 12-bit ADC
}

void loop() {
  int rawRead = analogRead(SENSOR_PIN);
  
  // Apply exponential moving average low-pass filter
  filteredValue = (alpha * rawRead) + ((1.0 - alpha) * filteredValue);
  
  // Constrain the filtered reading within calibrated limits
  int constrainedRead = constrain((int)filteredValue, CAL_MIN, CAL_MAX);
  
  // Map raw values to 0 - 100 percentage
  int throttlePercent = map(constrainedRead, CAL_MIN, CAL_MAX, 0, 100);
  
  Serial.print("Raw:");
  Serial.print(rawRead);
  Serial.print(",Filtered:");
  Serial.print(filteredValue);
  Serial.print(",Throttle_Percent:");
  Serial.println(throttlePercent);
  
  delay(50);
}