Prime Finder rev_02

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    - Project: Prime Finder
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2025-12-08 15:27:05

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Generate a Graph of the water flow and the water */
    /* pressure. */
/****** END SYSTEM REQUIREMENTS *****/


/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <WiFiProvisioner.h>  //https://github.com/SanteriLindfors/WiFiProvisioner
#include <FlowSensor.h>  //https://github.com/hafidhh/FlowSensor-Arduino

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t esp32_YF-B1_OUT_PIN_D13      = 13;
const uint8_t esp32_YF-S201_OUT_PIN_D4       = 4;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/

unsigned long startTime;
unsigned long duration = 30000; // 30 seconds
unsigned long currentNumber = 2;
unsigned long maxPrime = 2;

bool isPrime(unsigned long n) {
  if (n < 2) return false;
  if (n % 2 == 0 && n != 2) return false;
  for (unsigned long i = 3; i * i <= n; i += 2) {
    if (n % i == 0) return false;
  }
  return true;
}

void setup() {
  Serial.begin(115200);
  startTime = millis();
  pinMode(esp32_YF-B1_OUT_PIN_D13,  INPUT);
  pinMode(esp32_YF-S201_OUT_PIN_D4,  INPUT);
}

void loop() {
  if (millis() - startTime < duration) {
    if (isPrime(currentNumber)) {
      maxPrime = currentNumber;
    }
    currentNumber++;
  } else {
    Serial.print("Highest prime found in 30 seconds: ");
    Serial.println(maxPrime);
    while (true) {} // Stop the program
  }
}

/* END CODE */