ESP_nano_

#define BLYNK_PRINT Serial    // Comment this out to disable prints and save space
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
char ssid[] = "xxx";
char pass[] = "yyyyyyyyyyyyyy";
char auth[] = "sssssssssssssssssssssssss";

WidgetLED led1(V30); // vLED indikator ESP for test
WidgetTerminal terminal31(V31); //terminal ESP for test

WidgetLED led00(V0); // vLEDs for NANO
WidgetLED led01(V1); //
WidgetLED led02(V2); //
WidgetLED led03(V3); //
WidgetLED led04(V4); //

#include <WidgetRTC.h>
WidgetRTC rtc;
BLYNK_ATTACH_WIDGET(rtc, V25); //rtc for NANO
WidgetTerminal terminal29(V29); //terminal for NANO

BLYNK_WRITE_DEFAULT() // send info form APP to NANO
{
  String strtosend = "";
  int pin = request.pin;      // Which exactly pin is handled?
  strtosend += 'V' + String(pin) + ':';
  for (auto i = param.begin(); i < param.end(); ++i) { //only 1 param now
    strtosend += i.asString();
  }
  Serial.println(strtosend);
}

void Blynkwrite(String str2) {//  command from NANO to APP
  byte pin2;
  String strdata2;
  int data2;
  if (str2.charAt(0) != 'v') pin2 = 199; else {
    String istr = str2.substring(1, str2.indexOf(':')); // nr vPin
    pin2 = istr.toInt();
    strdata2 = str2.substring(str2.indexOf(':') + 1); // if nr vPin typ int
    data2 = strdata2.toInt();
  }
  switch (pin2 + 1) { // Switch to progrma for recived vPin
    case 1: if (data2) led00.on(); else led00.off();  break; //V0 to V4 - vLEDs
    case 2: ;  break;
    case 3: ;  break;
    case 4: ;  break;
    case 5: ;  break;
    case 6: ESP_BlynkvirtualWrite_int(pin2, data2);  break;  //V5 to V24 /data int
    //etc..                                                   // V25 rtc

    case 26: ESP_BlynkvirtualWrite_str(pin2, strdata2);  break; // V26 to V 28 data str

    case 30: ;  break;                                           // V29 terminal
    //   case 200:   Serial.println("ERROR - Brak char V");  break; //Program for error
    default: ;
  }
}

void ESP_BlynkvirtualWrite_int(byte vPin, int intdata)
{
  Blynk.virtualWrite(vPin, intdata);
}
void ESP_BlynkvirtualWrite_str(byte vPin, String strdata)
{
  Blynk.virtualWrite(vPin, strdata);
}

// ....................................... recive string from serial
bool  stringComplete = false;
String inputString = "";
byte licznikodbioru = 0;

void recivestrfromserial () {
  if (stringComplete) {
    Serial.println("odebralem  " + String(inputString)); //test
    Blynkwrite(inputString);
    inputString = "";
    stringComplete = false;
    licznikodbioru = 0;
  }
}

void myserialEvent() { // string z Serial
  while (Serial.available()) {
    //  Serial.println("odbior");
    licznikodbioru++;
    char inChar = (char)Serial.read();
    inputString += inChar;
    if (inChar == '\n') {
      stringComplete = true;
    }
    if (licznikodbioru > 50) inputString = "";
  }
}

void setup()
{
  Serial.begin(115200);
  WifiBlynk(); //logowanie do wifi i blynk
} //end setup

void loop()  //>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> loop
{
  Blynk.run();
  myserialEvent();
  recivestrfromserial();
}
//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>  end loop

void WifiBlynk() { //logowanie do wifi i blynk nie wstrzymujące wejścia do pętli głównej
  WiFi.begin(ssid, pass);
  Blynk.config(auth);
  WiFi.status();
  Blynk.connect();
}

bool isFirstConnect = true;
BLYNK_CONNECTED() {
  if (isFirstConnect) {
    Blynk.syncAll();  //ważna procedura - po starcie arduino synchronizuje wszystkiw wirtualne piny ze zmiennymi programu
    isFirstConnect = false;
  }
}