Print IP to LCD

writeIP.ino

#include <LiquidCrystal.h>

String buffer;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
boolean isPacket = false;

void setup() {
     Serial.begin(9600); 
     lcd.begin(20, 2);
}

void onMessageRecive( String msg) {
    lcd.clear();
    lcd.print(msg);
}

void loop() {
  if(Serial.available()) {
    char c = (char) Serial.read();
    
    if(c == '{') {
       isPacket = true; 
    } else if(c == '}') {
        isPacket = false;
        onMessageRecive(buffer);
        buffer = ""; //empty the buffer
    } else if(isPacket){
        buffer += c;
    }  
    
  }
  
}

writeIP.py

import serial
import socket

arduino = serial.Serial('/dev/ttyAMA0')
ip = socket.gethostbyname(socket.gethostname())
arduino.write("{IP:"+ip+"}")