Seetron BPI-216 2x16 Serial LCD

SN74LS04 Hex Inverter

Seetron 2x16 Serial LCD

LCD Serial Backpack FAQ - What about taking data straight from a UART?

#include <SoftwareSerial.h>

#define rxPin 6
#define txPin 7

SoftwareSerial mySerial =  SoftwareSerial(rxPin, txPin);

void setup()
{
  pinMode(rxPin, INPUT);
  pinMode(txPin, OUTPUT);
  mySerial.begin(2400);
  mySerial.print(254, BYTE);
  mySerial.print(1, BYTE);
  mySerial.print("Hello World");
}

void loop(){

  for(int x=0; x<255; x++)
  {
    mySerial.print(254, BYTE);
    mySerial.print(192, BYTE);
    mySerial.print(x); mySerial.print("  ");
    delay(100);
  }
  
}

void cls(){
  mySerial.print(254, BYTE);
  mySerial.print(1, BYTE);
}