Arduino server stops responding after a while

[jndfj7]

Hello everyone! I'm currently having problems with my arduino uno webserver using the ethernet shield v2. Everything works fine for about 5 hours and afterwards seemingly stops responding with this error(https://cdn.discordapp.com/attachments/821414861178142731/860420975459434506/unknown.png). Any pointers?

#include <SPI.h>

#include <Ethernet.h>

#include <DS3231.h>

DS3231 rtc(SDA, SCL);

#include <notes.h>

//warning
#define buzzer 2
bool warningSong = false;
//door
#define dirPin A0
#define stepPin A1
#define openSwitch A3
#define closeSwitch A2
#define frequencyDelay 180

//solenoid-water
#define watertrigPin 5
#define waterechoPin 6
#define solenoidPin 7

double low_bound = 5.0;
double high_bound = 2.0;
double waterBucketHeight = 12.5;
double gallons_full;
double gallons_per_inch = 1.36;
double waterDistance;

bool solenoidOn = true;

//food
#define foodtrigPin 8
#define foodechoPin 9

double foodBucketHeight = 15.7;
double pounds_full;
double pounds_per_inch = 3.821;
double foodDistance;

//timer

bool timerOn = false;

bool autoDoor = false;

int morning = 11;

int night = 21;

int closeHours[] = {
  21,
  22,
  23,
  24,
  1,
  2,
  3,
  4,
  5,
  6,
  7,
  8,
  9,
  10
};

int openHours[] = {
  11,
  12,
  13,
  14,
  15,
  16,
  17,
  18,
  19,
  20,
};

byte mac[] = {
  0xDE,
  0xAD,
  0xBE,
  0xEF,
  0xFE,
  0xED
};
IPAddress ip(192, 168, 254, 99);

EthernetServer server(80);

#define REQ_BUF_SZ   100
char HTTP_req[REQ_BUF_SZ] = {0}; // buffered HTTP request stored as null terminated string
char req_index = 0;              // index into HTTP_req buffer

void setup() {

  pinMode(4, OUTPUT);
  digitalWrite(4, HIGH);

  //solenoid
  pinMode(solenoidPin, OUTPUT);
  pinMode(watertrigPin, OUTPUT);
  pinMode(waterechoPin, INPUT);
  digitalWrite(solenoidPin, HIGH);

  //door
  pinMode(dirPin, OUTPUT);
  pinMode(stepPin, OUTPUT);
  pinMode(openSwitch, INPUT_PULLUP);
  pinMode(closeSwitch, INPUT_PULLUP);

  //food
  pinMode(foodtrigPin, OUTPUT);
  pinMode(foodechoPin, INPUT);

  Serial.begin(9600);

  rtc.begin();

  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);

  if (Ethernet.hardwareStatus() == EthernetNoHardware) {
    Serial.println("Ethernet shield was not found.");
  }

  if (Ethernet.linkStatus() == LinkOFF) {
    Serial.println("Ethernet cable is not connected.");
  }

  // start the server
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
}

// sets every element of str to 0 (clears array)
void StrClear(char *str, char length)
{
  for (int i = 0; i < length; i++) {
    str[i] = 0;
  }
}

char StrContains(char *str, char *sfind)
{
  char found = 0;
  char index = 0;
  char len;

  len = strlen(str);

  if (strlen(sfind) > len) {
    return 0;
  }
  while (index < len) {
    if (str[index] == sfind[found]) {
      found++;
      if (strlen(sfind) == found) {
        return 1;
      }
    }
    else {
      found = 0;
    }
    index++;
  }

  return 0;
}

void playwarning() {
  for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {

    // calculates the duration of each note
    divider = melody[thisNote + 1];
    if (divider > 0) {
      // regular note, just proceed
      noteDuration = (wholenote) / divider;
    } else if (divider < 0) {
      // dotted notes are represented with negative durations!!
      noteDuration = (wholenote) / abs(divider);
      noteDuration *= 1.5; // increases the duration in half for dotted notes
    }

    // we only play the note for 90% of the duration, leaving 10% as a pause
    tone(buzzer, melody[thisNote], noteDuration * 0.9);

    // Wait for the specief duration before playing the next note.
    delay(noteDuration);

    // stop the waveform generation before the next note.
    noTone(buzzer);
  }
}

//door open
void open(bool warningSong) {
  if (digitalRead(openSwitch) != LOW) {
    if (warningSong) {
      playwarning();
      warningSong = false;
    }
    while (digitalRead(openSwitch) != LOW) {
      digitalWrite(dirPin, LOW);
      digitalWrite(stepPin, LOW);
      digitalWrite(stepPin, HIGH);
      delayMicroseconds(frequencyDelay);
    }
  }
}

//door close
void close(bool warningSong) {
  if (digitalRead(closeSwitch) != LOW) {
    if (warningSong) {
      playwarning();
      warningSong = false;
    }
    while (digitalRead(closeSwitch) != LOW) {
      digitalWrite(dirPin, HIGH);
      digitalWrite(stepPin, LOW);
      digitalWrite(stepPin, HIGH);
      delayMicroseconds(frequencyDelay);
    }
  }
}

void get_water_measurement_amount() {

  long duration;

  // Clears the trigPin
  digitalWrite(watertrigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(watertrigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(watertrigPin, LOW);
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(waterechoPin, HIGH);
  // Calculating the waterDistance
  waterDistance = ((duration * 0.034) / 2.0) / 2.54;
  gallons_full = gallons_per_inch * (waterBucketHeight - waterDistance);
}

void trigger_water_low_bound() {
  while (waterDistance > high_bound && waterDistance < 15.0) {
    digitalWrite(solenoidPin, LOW);
    Serial.println(waterDistance);
    Serial.println("FAUCET ON, GALLONS: ");
    Serial.println(gallons_full);
    get_water_measurement_amount();
  }

  digitalWrite(solenoidPin, HIGH);
  Serial.println("FAUCET OFF, GALLONS: ");
  Serial.println(gallons_full);
}

void get_food_measurement_amount() {

  long duration;

  // Clears the trigPin
  digitalWrite(foodtrigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(foodtrigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(foodtrigPin, LOW);
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(foodechoPin, HIGH);
  // Calculating the waterDistance
  foodDistance = ((duration * 0.034) / 2.0) / 2.54;
  pounds_full = pounds_per_inch * (foodBucketHeight - foodDistance);
}

void timeCheck() {
  Time currentTime = rtc.getTime();
  int currentHour = currentTime.hour;

  for (int cnt = 0; cnt < 10; cnt++) {
    if (openHours[cnt] == currentHour) {
      open(false);
    }
  }
  for (int cnt = 0; cnt < 14; cnt++) {
    if (closeHours[cnt] == currentHour) {
      close(true);
    }
  }
}

void(* resetFunc) (void) = 0;

void loop() {
  // Create a client connection
  EthernetClient client = server.available();

  get_food_measurement_amount();

  get_water_measurement_amount();

  if (Ethernet.linkStatus() == LinkOFF) {

    timeCheck();

    if (waterDistance >= low_bound && waterDistance < 15.0) {
      trigger_water_low_bound();
    }
  }
  else {
    if (timerOn && autoDoor) {
      Time currentTime = rtc.getTime();
      int currentHour = currentTime.hour;
      if (currentHour == morning || currentHour == night) {
        timeCheck();
      }
      if (solenoidOn) {
        if (waterDistance >= low_bound && waterDistance < 15.0) {
          trigger_water_low_bound();
        }
      }
    }
  }

  if (client) {
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();

        //read char by char HTTP request
        if (req_index < (REQ_BUF_SZ - 1)) {
          HTTP_req[req_index] = c;          // save HTTP request character
          req_index++;
        }

        //if HTTP request has ended
        if (c == '\n' && currentLineIsBlank) {

          //now output HTML data header

          client.println(F("HTTP/1.1 200 OK"));
          client.println(F("Content-Type: text/html"));
          client.println(F("Connection: close"));  // the connection will be closed after completion of the response
          client.println();

          client.println(F("<!DOCTYPE HTML>"));
          client.println(F("<HTML>"));
          client.println(F("<HEAD>"));
          client.println(F("<meta name='viewport' content='width=device-width, initial-scale=1.0'>"));
          client.println(F("<TITLE></TITLE>"));
          client.println(F("</HEAD>"));
          client.println(F("<script>"));
          client.println(F("if(typeof window.history.pushState == 'function') {"));
          client.println(F("window.history.pushState({}, 'Hide', 'http://192.168.254.99/');"));
          client.println(F("}"));
          client.println(F("</script>"));
          client.println(F("<BODY>"));

          client.println(F("<FORM ACTION='/' method=get style = 'display:flex; flex-direction:column; text-align:center; width: 300px; margin-left: auto; margin-right: auto; margin-top: 50px;'>")); //uses IP/port of web page

          if (timerOn) {
            client.println(F("<p>"));

            client.println(F("time:"));

            client.println(rtc.getTimeStr());

            client.println(F("</p>"));

            client.println(F("<p>temperature: "));

            client.println(((rtc.getTemp()) * 1.8) + 16.0);

            client.println(F("degrees</p>"));
          }
          client.println(F("<p>door: "));
          if (digitalRead(openSwitch) == LOW) {
            client.println(F("<b>OPEN</b>"));
          }
          if (digitalRead(closeSwitch) == LOW) {
            client.println(F("<b>CLOSED</b>"));
          }
          client.println(F("</p>"));
          client.println(F("<button TYPE=SUBMIT name = 'OPENDOORNOWARN'>open door</button>"));

          client.println(F("<button TYPE=SUBMIT name = 'CLOSEDOORNOWARN' style = 'margin-bottom: 10px;'>close door</button>"));

          client.println(F("<button TYPE=SUBMIT name = 'OPENDOORWARN'>open door (warning)</button>"));

          client.println(F("<button TYPE=SUBMIT name = 'CLOSEDOORWARN'>close door (warning)</button>"));

          client.println(F("<p>solenoid: "));
          if (solenoidOn) {
            client.println(F("<b>ON</b>"));
          } else {
            client.println(F("<b>OFF</b>"));
          }
          client.println(F("</p>"));

          client.println(F("<button TYPE=SUBMIT name = 'SOLENOIDON'>solenoid on</button>"));

          client.println(F("<button TYPE=SUBMIT name = 'SOLENOIDOFF'>solenoid off</button>"));

          client.println(F("<p>auto door: "));
          if (autoDoor) {
            client.println(F("<b>ON</b>"));
          } else {
            client.println(F("<b>OFF</b>"));
          }
          client.println(F("</p>"));

          client.println(F("<button TYPE=SUBMIT name = 'AUTOON'>auto door on</button>"));

          client.println(F("<button TYPE=SUBMIT name = 'AUTOOFF'>auto door off</button>"));

          client.println(F("<p>food: "));

          if (pounds_full < 25.0) {
            client.println(F("<b>LOW</b>; "));
          }

          client.println(pounds_full);

          client.println(F(" pounds</p>"));

          client.println(F("<p>water: "));

          if (waterDistance > low_bound) {
            client.println(F("<b>LOW</b>;"));
          }

          client.println(gallons_full);

          client.println(F(" gallons</p>"));

          client.println(F("<button TYPE=SUBMIT name = 'TIMERON' style = 'width: 100px; text-align:center; margin-left: auto; margin-right: auto;'>timer on</button>"));

          client.println(F("<button TYPE=SUBMIT name = 'TIMEROFF' style = 'width: 100px; text-align:center; margin-left: auto; margin-right: auto;'>timer off</button>"));

          client.println(F("<button TYPE=SUBMIT name = 'RESET' style = 'width: 100px; text-align:center; margin-left: auto; margin-right: auto;'>reset arduino</button>"));

          client.println(F("</FORM>"));

          client.println("");

          client.println(F("</BODY>"));
          client.println(F("</HTML>"));

          if (c == '\n' && currentLineIsBlank) {
            // you're starting a new line
            currentLineIsBlank = true;
          } else if (c != '\r') {
            // you've gotten a character on the current line
            currentLineIsBlank = false;
          }
          delay(1);
          //stopping client
          client.stop();


          if (StrContains(HTTP_req, "OPENDOORNOWARN")) {
            open(false);
          }
          if (StrContains(HTTP_req, "OPENDOORWARN")) {
            open(true);
          }

          if (StrContains(HTTP_req, "CLOSEDOORNOWARN")) {
            close(false);
          }
          if (StrContains(HTTP_req, "CLOSEDOORWARN")) {
            close(true);
          }
          if (StrContains(HTTP_req, "SOLENOIDOFF")) {
            solenoidOn = false;
          }
          if (StrContains(HTTP_req, "SOLENOIDON")) {
            solenoidOn = true;
          }
          if (StrContains(HTTP_req, "AUTOON")) {
            autoDoor = true;
          }
          if (StrContains(HTTP_req, "AUTOOFF")) {
            autoDoor = false;
          }
          if (StrContains(HTTP_req, "TIMERON")) {
            timerOn = true;
          }
          if (StrContains(HTTP_req, "TIMEROFF")) {
            timerOn = false;
          }
          if (StrContains(HTTP_req, "RESET")) {
            resetFunc();
          }
          req_index = 0;
          StrClear(HTTP_req, REQ_BUF_SZ);
        }
        if (c == '\n') {
          // last character on line of received text
          // starting new line with next character read
          currentLineIsBlank = true;
        }
        else if (c != '\r') {
          // a text character was received from client
          currentLineIsBlank = false;
        }
      }
    }
  }
}

[SteveMann]

Your link points to nothing. If you have an error message post it here, not an image, and use code tags.

[dacho]

Hi, Don't forget to read how to get the best out of the forum. There is no need to post the same request in two categories.

How to get the best out of this forum

See also FAQ - Arduino Forum for general rules on forum behaviour and etiquette. Hello, Welcome to the Arduino Forum. This guide explains how to get the best out of this forum. Please read and follow the instructions below. Being new here you might think this is having rules for the sake of rules, but that is not the case. If you don’t follow the guidelines all that happens is there is a long exchange of posts while we try to get you to tell us what we need in order to help you, which is fru…