// Exercise 01.1 - Connecting a PT100 to an Arduino

// Objective: Create a sketch to continuously read the temperature
// from a PT100 sensor connected to A0 and display it through the Serial output.
// A potentiometer is used to simulate the PT100 voltage input.
// The analog value from the potentiometer is processed as if it were from your PT100 circuit.

// Resources:
// Read analog input: https://www.arduino.cc/reference/en/language/functions/analog-io/analogread/
// Serial output: https://www.arduino.cc/reference/en/language/functions/communication/serial/println/
// Arduino cheat sheet: https://dlnmh9ip6v2uc.cloudfront.net/learn/materials/8/Arduino_Cheat_Sheet.pdf

// Define the analog pin for PT100 connection
int pt100Pin = A0;

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

  // Initialization code:
  // Set up the necessary configurations
}

void loop() {
  // Main code:
  // Read the analog value from the potentiometer and process it as if it were from your PT100 circuit.
  // Use these variables:
  int analogValue;
  float voltage;
  float temperature;

  // a) From analogRead, you get a value between 0 and 1023. Set 'analogValue' to this value.
  analogValue = analogRead(pt100Pin);

  // b) This analog value represents a voltage on pin A0. Calculate the voltage and write it to 'voltage'.
  // Hint: The division of two integer values will return an int. To get a precise result, use floats:
  // float a = 1/2; will result in 1
  // float a = 1.0/2; will result in 0.5
  // because 1 is an integer, but 1.0 is a float
  voltage = analogValue * (5.0 / 1023.0);

  // c) Then you have to convert the voltage to a temperature in Kelvin or Celsius.
  // For this, you already have the formula for your specific PT100 circuit. Write the result to 'temperature'.
  temperature = voltage * 20 - 20; // <-- this is not the right formula!

  // d) Print the results using Serial.print() and Serial.println().
  // It should look something like this: "analogValue: xxx, voltage: xxx V, temperature: xxx °C"
  Serial.print("analogValue: ");
  Serial.print(analogValue);
  Serial.print(", voltage: ");
  Serial.print(voltage);
  Serial.print(" V, temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  // Add a delay for better readability and to avoid flooding the Serial monitor
  delay(1000);

  // You can visualize the outcome using the Serial Monitor
  // located in the upper right corner of the Arduino IDE.
  // Check if the values in the console match your expectations.
}