#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#define TX_PIN 21  
#define RX_PIN 20  
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
    Serial.begin(115200);       
    Serial1.begin(9600, SERIAL_8N1, RX_PIN, TX_PIN);  
   lcd.begin();
    lcd.backlight();
}

void loop() {
    if (Serial1.available()) {
        String receivedData = Serial1.readStringUntil('\n'); 
        receivedData.trim();  
        Serial.print("Received: ");
        Serial.println(receivedData);
         lcd.setCursor(0, 0);
        lcd.print("measuredVoltage"); // Add spaces to clear previous text
        lcd.setCursor(0, 1);
        lcd.print(receivedData);
   }
    }