#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);  // set the LCD address to 0x27 for a 16 chars and 2 line display
#include <SoftwareSerial.h>
const byte rxPin = 2;
const byte txPin = 3;
#define MY_NAME "Slaveb"

SoftwareSerial mySerial(rxPin, txPin);
const byte numChars = 32;
char receivedChars[numChars];
char tempChars[numChars];  // temporary array for use when parsing
// variables to hold the parsed data
char messageFromPC[numChars] = { 0 };
int integerFromPC = 0;
boolean newData = false;
void setup() {
  Serial.begin(9600);
  mySerial.begin(9600);
  lcd.init();  // initialize the lcd
  lcd.backlight();
}

void loop() {

  recvWithStartEndMarkers();
  if (newData == true) {
    strcpy(tempChars, receivedChars);
    // this temporary copy is necessary to protect the original data
    //   because strtok() used in parseData() replaces the commas with \0
    parseData();
    Serial.print("Message ");
    Serial.println(messageFromPC);
    Serial.print("Integer ");
    Serial.println(integerFromPC);
    if (strcmp(messageFromPC, MY_NAME) == 0 && integerFromPC == 1) {
      lcd.blink();
      lcd.setCursor(1, 0);
      lcd.print("Hello, world!");
      Serial.print("ِAction");
    } else if (messageFromPC[numChars] = "Slavea" && integerFromPC == 1) {
      lcd.clear();
    } else if (messageFromPC[numChars] = "Slavea" && integerFromPC == 0)  {
      lcd.clear();
    }


    newData = false;
  }
}

//============

void recvWithStartEndMarkers() {
  static boolean recvInProgress = false;
  static byte ndx = 0;
  char startMarker = '<';
  char endMarker = '>';
  char rc;

  while (mySerial.available() > 0 && newData == false) {
    rc = mySerial.read();

    if (recvInProgress == true) {
      if (rc != endMarker) {
        receivedChars[ndx] = rc;
        ndx++;
        if (ndx >= numChars) {
          ndx = numChars - 1;
        }
      } else {
        receivedChars[ndx] = '\0';  // terminate the string
        recvInProgress = false;
        ndx = 0;
        newData = true;
      }
    }

    else if (rc == startMarker) {
      recvInProgress = true;
    }
  }
}

//============

void parseData() {                      // split the data into its parts
  char* strtokIndx;                     // this is used by strtok() as an index
  strtokIndx = strtok(tempChars, ",");  // get the first part - the string
  strcpy(messageFromPC, strtokIndx);    // copy it to messageFromPC

  strtokIndx = strtok(NULL, ",");    // this continues where the previous call left off
  integerFromPC = atoi(strtokIndx);  // convert this part to an integer
}

//============