#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 20, 4); // I2C address 0x27, 20 column and 4 rows

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  lcd.init(); // initialize the lcd
  lcd.backlight();
  lcd.setCursor(0, 0);         // move cursor to   (11, 3)
  lcd.print("Proto X101"); // print message at (11, 3)
  lcd.setCursor(0, 1);         // move cursor to   (11, 3)
  lcd.print("Charging Station"); // print message at (11, 3)
  lcd.setCursor(0, 2);         // move cursor to   (11, 3)
  lcd.print("Firmware Version 1.0"); // print message at (11, 3)
  lcd.setCursor(0, 3);         // move cursor to   (11, 3)
  lcd.print("August 7, 2023"); // print message at (11, 3)
  delay(1000);
  lcd.clear();
  //attachInterrupt(digitalPinToInterrupt(countcoinbutt),countcoins,RISING);
  //coinvalue=add_time_min*60;
}
char reciev_com;//recieved command
char reciev_com_promo;//
char recieve_sys_code;


void update_data(){


}
void loop() {
  // put your main code here, to run repeatedly:
  String sms__ =String( Serial.read());//read SMS
  //sms[0]~sms[1]=command
  //sms[2]~sms[12]=promo
  //sms[13]~sms[20=system code]
  for(int x=0;x<21;x++){
    if(x<2){
      reciev_com=reciev_com+sms__[x];
    }
    if(x==2||x<13){
      reciev_com_promo=reciev_com_promo+sms__[x];
    }
    if(x==13||x<22){
            recieve_sys_code=recieve_sys_code+sms__[x];
    }
    if(x=22){
        Serial.println("reciev_com="+reciev_com);
  Serial.println("recieved_com_promo="+reciev_com_promo);
  Serial.println("recieve_sys_code="+recieve_sys_code);
    }
  }

}