Why the receiver side is not showing continuously "Hello World"

Using Arduino Programming Questions
1

Why my receiver side is not showing the data continuously? why it's showing only once?

//Transmitter
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
RF24 radio(7, 8);
const byte rxAddr[6] = "00001";
void setup()
{
Serial.begin(9600);
radio.begin();
radio.setRetries(15, 15);
radio.openWritingPipe(rxAddr);
radio.stopListening();
}
void loop()
{
const char text[] = "Hello World";
radio.write(&text, sizeof(text));
Serial.println(text);
delay(1000);
}

//receiver
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
RF24 radio(7, 8);
const byte rxAddr[6] = "00001";
void setup()
{
while (!Serial);
Serial.begin(9600);
radio.begin();
radio.openReadingPipe(0, rxAddr);
radio.startListening();
}
void loop()
{
if (radio.available())
{
char text[32] = {0};
radio.read(&text, sizeof(text));
Serial.println(text);
}
}
2

why the square wave is not showing continuously in the receiver side?

//Transmitter
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

int output_state = 0;
unsigned long start;

RF24 radio(7,8);

const byte rxAddr[6] = "00001";

void setup() {
  Serial.begin (9600);
  start = millis();
  radio.begin ();
  radio.setRetries (15, 15);
  radio.openWritingPipe (rxAddr);

  radio.stopListening();

}

void loop() {

  if((millis() - start) >=1000) {
   output_state = ! output_state;
   start = millis();
  }
    radio.write(&output_state, sizeof(output_state));
    Serial.println(output_state);
    //delay (1000);
}

//Receiver
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

int output_state = 0;

RF24 radio(7,8);

const byte rxAddr[6] = "00001";

void setup() {

  while (!Serial);
  Serial.begin (9600);
  radio.begin();
  radio.openReadingPipe(0, rxAddr);
  radio.startListening();
  
}

void loop() {
      
      radio.read(&output_state, sizeof(output_state));
      Serial.println(output_state);
      delay(1000);
    }
3

DON'T double post

...R

4

I wonder if you are using the ManiacBug version of the RF24 library? IIRC that does not like long intervals between messages. I recommend the newer TMRh20 version of the RF24 library

...R
Simple nRF24L01+ Tutorial