void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  char* astr = {"hello\0"};
  int length = strlen(astr);
  const uint8_t* payload = (const uint8_t*)astr;

  char message[length + 1] = {0x00};
  const uint8_t* p = payload;
  for (int i = 0; i < length; i++) {
    Serial.print(*(const char *)p);
    message[i] = *p;
    p++;
  }
  Serial.println();
  Serial.println(message);

  //let's payload a 32 bit int..
  int32_t myInt = 32100;
  length = sizeof(int32_t);
  const uint8_t* payload2 = (const uint8_t*)&myInt;

  const uint8_t* p2 = payload2;
  int32_t recvInt;
  if (length == sizeof(int32_t)) {
    memmove(&recvInt, payload2, sizeof(int32_t));
  }

  Serial.println();
  Serial.println(recvInt);

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}