Need help getting my ultra sound distance measurement and lcd working

Using Arduino Microcontrollers
1

Hello all. I am new to arduino but not programming. I have accomplished some projects now. I am working on with a HC-SR04 a standard lcd and an elegoo but will get an arduino soon. I am using this following tutorials.

and

The first one is how I hooked up my lcd it is working fine. The second url has added stuff like the ultra sound sensor.

The following code is what I have compiled and run on my elegoo.

[code]

#include <LiquidCrystal.h> // includes the LiquidCrystal Library 
LiquidCrystal lcd(1, 2, 4, 5, 6, 7); // Creates an LC object. Parameters: (rs, enable, d4, d5, d6, d7) 

#define  trigger_pin  15                          // HC-SR04 trigger pin is connected to Arduino A1
#define  echo_pin     14                          // HC-SR04 echo pin is connected to Arduino A0
 
int ledPin = 13;                // choose the pin for the LED
int inputPin = 9;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status
 
void setup() {

  pinMode(trigger_pin, OUTPUT);
  pinMode(echo_pin, INPUT);
  digitalWrite(trigger_pin, LOW);
  
  lcd.begin(16,2); // Initializes the interface to the LCD screen, and specifies the dimensions (width and height) of the display } 

  lcd.print("Distance"); // Prints "Arduino" on the LCD 
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare sensor as input
 
  Serial.begin(9600);
}
 unsigned long duration;
unsigned int  distance;
void loop(){

  
  // Send 10us pulse to HC-SR04 Trigger pin
  digitalWrite(trigger_pin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger_pin, LOW);
  
  // Read pulse comes from HC-SR04 Echo pin
  duration = pulseIn(echo_pin, HIGH);           // Read echo pulse width
  if(duration == 0) {                           // Previous function returns 0 if timeout
    lcd.setCursor(2, 1);
    lcd.print("  Time Out  ");
  }
  else {
    distance = duration / 58;                   // Calculate the distance in cm
    if(distance > 400) {                        // HC-SR04 module can measure up to 400cm
      lcd.setCursor(2, 1);
      lcd.print("Out of Range");
    }
    else {
      lcd.setCursor(2, 1);
      lcd.print("       cm   ");
      lcd.setCursor(5, 1);
      lcd.print(distance);
    }
  }
  delay(100);   


  
}

[/code]

The output result is a few machine letters that move around the lcd screen to many different locations I uploaded an image of what the letters say. I cannot understand them I was hoping that someone would understand what it means so maybe I can figure out what is wrong.

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Untitled889.png
Untitled889.png1903×945 3.67 KB

2

Here is an image of the project.

52d0b90d8ec0ba996be483b1aea5698316288585.jpg
52d0b90d8ec0ba996be483b1aea5698316288585.jpg2592×1936 959 KB

image1[1618].JPG

3 
LiquidCrystal lcd(1, 2, 4, 5, 6, 7)

It is unwise to use pin 1 for the LCD. It is the TX pin for hardware serial.

I wired a LCD and HCSR04 to my Uno and tried your code after changing the LCD constructor to:

LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

And changing the LCD wiring to match. The top line of the LCD reads "Distance" and on the second line the range in cm or "Out of Range".

4

Waw totally big help. now that i did what you said it is 100% working the way i wanted. thanks alot.