LED and buzzer does'nt work

Other Hardware Robotics
1

so I'm working on a project for my school making a radar and thermometer with Arduino. and the code is like this.

#include <Servo.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>

#define DHTPIN 8
#define DHTTYPE DHT22

DHT_Unified dht(DHTPIN, DHTTYPE);


Servo servo_1;

int trig = 4;
int echo = 5;

int buzzpin = 13;
int buzzstate = LOW;

int ledr = 12;
int ledg = 11;
int ledstatus = 13;


unsigned long previousMillis = 0;

const long intervalFar = 250;
const long intervalClose = 50;
const long intervalIdle = 1250;


int servo_pin = 3;
int pos = 0;
int distance,duration;


void setup() {
  Serial.begin(115200);
  Serial.println("Radar Start");
  pinMode(ledr, OUTPUT);
  pinMode(ledg, OUTPUT);
  pinMode(buzzpin, OUTPUT);
  Serial.begin(115200);
  servo_1.attach(servo_pin);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  dht.begin();
}


// moving servo
void loop() {
  for (pos = 0; pos <= 180; pos+= 1){ // arah kiri ke kanan
    servo_1.write(pos);
    delay(60);
    dist_calc(pos);
    }
    
  for (pos = 180; pos >= 0; pos -= 1){ // arah kanan ke kiri
    servo_1.write(pos);
    delay(60);
    dist_calc(pos);
    }

  


}

float dist_calc(int pos){
//trigger HC-SR04 sensor
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);

  duration = pulseIn(echo, HIGH);
  distance = 100.0*(343.0*(duration/2.0))/1000000.0;

  //led and buzzer
  if (distance <= 200 && distance > 100){
    unsigned long currentMillis = millis();



    if (currentMillis - previousMillis >= intervalFar){
      previousMillis = currentMillis;

      if (buzzstate == LOW) {
        buzzstate = HIGH;
        } else {
          buzzstate= LOW;
        }

        digitalWrite(buzzpin, buzzstate);
        digitalWrite(ledr, buzzstate);
        digitalWrite(ledg, LOW);
        
      }
    } else if (distance <= 100 && distance > 0) {
      unsigned long currentMillis = millis();

      if (currentMillis - previousMillis >= intervalClose) {
        previousMillis = currentMillis;


        if (buzzstate = LOW) {
          buzzstate = HIGH;
          } else {
            buzzstate = LOW;
          }

          digitalWrite(buzzpin, buzzstate);
          digitalWrite(ledr, buzzstate);
          digitalWrite(ledg, LOW);
          
        }
      
      } else if (distance > 200){
        digitalWrite(buzzpin, LOW);
        digitalWrite(ledr, LOW);
        digitalWrite(ledg, HIGH);
        
        }






//DHT22 sensor
  delay(1000);
  sensors_event_t event;
  dht.temperature().getEvent(&event);
  float temperature = event.temperature;




  Serial.print(pos);
  Serial.print(" , ");
  Serial.println(distance);
  
  if (isnan(event.temperature)) {
      Serial.println ("Error");
      }else {
        Serial.print("Suhu: ");
        Serial.println(temperature);
        }

}

when I tested the DHT22 and HC-SR04 sensors there were no problems. but the problem appears with the LED and buzzer so when the object approaches a distance between 0 - 100 cm there is no reaction whatsoever. even though I set it to flash and make a sound quickly

3

Are youn using same pin for both Activity.

begin serial two time.

Not pinMode() for ledstatus.