Check in nRF24 works

Receiver_nRF24_check.ino

// ESP32 odbiornik

#include <SPI.h>
#include "nRF24L01.h"
#include "RF24.h"

const byte DEBUG = false;
char msg[6];
//RF24 radio(7, 8); // atmega328
//RF24 radio(12, 14, 26, 25, 27); // ESP32
RF24 radio(2, 4); // nodeMCU ESP8266
const uint64_t pip = 0xE8E8F0F0E1LL;

uint32_t t = 0;
uint32_t t_start = 0;

void setup(void) {
  Serial.begin(115200);
  radio.begin();
  radio.setChannel(2);
  radio.setPayloadSize(7);
  radio.setDataRate(RF24_250KBPS);
  radio.setPALevel(RF24_PA_HIGH);
  radio.openReadingPipe(1, pip);
  radio.startListening();

  t_start = millis();
}

void loop(void) {

  if (radio.available()) {
    radio.read(msg, 6);
    Serial.println(msg);
    delay(10);
    if(DEBUG){Serial.println(t);}
    t_start = millis();
  }
  else {
    t = millis() - t_start;
    if(DEBUG){Serial.println(t);
    delay(1000);}
  }

  if (t > 5000) {
    Serial.println("ERROR!");
    delay(1000);
  }
}