Serial read values

Projects Networking, Protocols, and Devices
4

With Serial.readString(), it doesn't display anything, but when I stop simulation it display the above attached image (uknown characters).

I am using Arduino Mega. The LCD works pefectly with other codes.
The corrected code :

1634981726614
16349817266141920×885 71.2 KB

1634981726632
16349817266321920×885 64.4 KB 

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // set the LCD address to 0x3F for a 16 chars and 2 line display

int foundValue = 0;
int cursor = 0;

void setup() {
  lcd.init();
  lcd.clear();
  lcd.backlight();      // Make sure backlight is on
  Serial.begin(9600);
}

void loop() {
  if (Serial.available() > 0) { 
    String rc;
    rc = Serial.readString();
    lcd.setCursor(cursor, 0);  //Set cursor to character 2 on line 0
    cursor += lcd.print(rc);  //print serial value to LCD
    cursor += lcd.print(" ");
  }

  delay(1000);    //Wait for 1s

  if (cursor >= 16) {
    lcd.clear();
    cursor = 0;
  }
}```