// Pin definitions
const int fabricVoltagePin = A0;  // Pin to measure voltage across the fabric
const int resistorVoltagePin = A1; // Pin to measure voltage across the 500-ohm resistor
const float supplyVoltage = 5.0;   // Supply voltage in volts
const float resistorValue = 500.0; // Resistor value in ohms

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

void loop() {
  // Measure the voltage across the fabric
  int fabricAnalogValue = analogRead(fabricVoltagePin);
  float fabricVoltage = (fabricAnalogValue / 1023.0) * supplyVoltage;

  // Measure the voltage across the 500-ohm resistor
  int resistorAnalogValue = analogRead(resistorVoltagePin);
  float resistorVoltage = (resistorAnalogValue / 1023.0) * supplyVoltage;

  // Calculate the current through the resistor (and fabric) using Ohm's Law
  float current = resistorVoltage / resistorValue; // Current in amperes

  // Calculate the resistance of the fabric using Ohm's Law
  if (current > 0) { // Avoid division by zero
    float fabricResistance = fabricVoltage / current;
    Serial.print("Fabric Resistance: ");
    Serial.print(fabricResistance);
    Serial.println(" ohms");
  } else {
    Serial.println("Error: Current is zero or invalid");
  }

  // Print the current for monitoring
  Serial.print("Current through fabric: ");
  Serial.print(current * 1000); // Convert to mA for easier reading
  Serial.println(" mA");

  delay(1000); // Wait 1 second before the next reading
}