Arduino uno Codes
these codes control what is output onto the screen

#include <SPI.h>
#include "epd1in54_V2.h"
#include "epdpaint.h"
#include <stdio.h>
#include <Wire.h>

Epd epd;
unsigned char image[1024];
Paint paint(image, 0, 0);

unsigned long time_start_ms;
unsigned long time_now_s;
#define COLORED     0
#define UNCOLORED   1

void setup()
{
  Serial.begin(115200);
  Serial.println("e-Paper init and clear");
  epd.LDirInit();
  epd.Clear();
  paint.SetWidth(200);
  paint.SetHeight(24);
 
  paint.Clear(COLORED);
  paint.DrawStringAt(45, 4, "ALIBABA HQ", &Font16, UNCOLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 10, paint.GetWidth(), paint.GetHeight());

  paint.Clear(UNCOLORED);
  paint.DrawStringAt(40, 4, "JACK MA", &Font24, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 34, paint.GetWidth(), paint.GetHeight());

  paint.Clear(UNCOLORED);
  paint.DrawStringAt(76, 4, "CEO", &Font16, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 58, paint.GetWidth(), paint.GetHeight());

  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "STATUS:", &Font12, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 86, paint.GetWidth(), paint.GetHeight());
 
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 10, "CONTACT:", &Font12, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 142, paint.GetWidth(), paint.GetHeight());

  paint.Clear(COLORED);
  paint.DrawStringAt(28, 4, "130 6778 6582", &Font16, UNCOLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 166, paint.GetWidth(), paint.GetHeight());

  paint.SetWidth(200);
  paint.SetHeight(4);

  paint.Clear(COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 82, paint.GetWidth(), paint.GetHeight());

  paint.Clear(COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 138, paint.GetWidth(), paint.GetHeight());

  
 
  epd.DisplayFrame();
  Wire.begin(0x40);
  Wire.onReceive(receiveEvent);
  //Serial.begin(9600);
 
}

void loop()
{
}

void receiveEvent(int howMany)
{
 
    Serial.println("data received");
    char cReceivedData = Wire.read();
    Serial.println(cReceivedData);

    if('1' == cReceivedData)
    {
  Serial.println("AVAILABLE");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "AVAILABLE", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
    }
  else if('0' == cReceivedData)
  {
  Serial.println("UNAVAILABLE");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "UNAVAILABLE", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
  else if('2' == cReceivedData)
  {
  Serial.println("AT LUNCH");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "AT LUNCH", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
  else if('3' == cReceivedData)
  {
  Serial.println("BUSY");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "BUSY", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
  else if('4' == cReceivedData)
  {
  Serial.println("DO NOT DISTURB");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "DO NOT DISTURB", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
  else if('5' == cReceivedData)
  {
  Serial.println("BE BACK SOON");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "BE BACK SOON", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
  else if('6' == cReceivedData)
  {
  Serial.println("PLEASE KNOCK");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "PLEASE KNOCK", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
  else if('7' == cReceivedData)
  {
  Serial.println("ON VACATION");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "ON VACATION", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
  else if('8' == cReceivedData)
  {
  Serial.println("PLEASE WAIT");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "PLEASE WAIT", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
  else if('9' == cReceivedData)
  {
  Serial.println("IN A MEETING");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "IN A MEETING", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
  else
  {
  Serial.println("NO STATUS");
  paint.SetWidth(200);
  paint.SetHeight(24);
  paint.Clear(UNCOLORED);
  paint.DrawStringAt(0, 4, "NO STATUS", &Font20, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 110, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  }
}