NRF24L01 PA+LNA With Arduino

Question

I am using the NRF module for remote communucation.I have been many research about nrf but my nrf module is not working This is my tranmistter code:

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

RF24 radio(7, 8,4000000); // CE, CSN

const byte address[6] = "00001";

void setup() {
  Serial.begin(115200);
  radio.begin();
  radio.openWritingPipe(address);
  radio.setRetries(15,15);
  radio.setPALevel(RF24_PA_HIGH);
 
}

void loop() {
  radio.stopListening();
  const char text[32]="Hello world";
  if(radio.write(&text,sizeof(text))){
    Serial.println("Mesaj gönderildi");
  }
  delay(1000);

This is my receiver code:

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

RF24 radio(7, 8,4000000); // CE, CSN

const byte address[6] = "00001";

void setup() {
  Serial.begin(9600);
  radio.begin();
  delay(400);
  radio.openReadingPipe(1, address);
  radio.setPALevel(RF24_PA_MAX);
//  radio.startListening();
   pinMode(10,OUTPUT);

}

void loop() {
 const char text[32]="";
  radio.startListening();
  if(radio.available())
  {
    while(radio.available()){
    radio.read(&text[0],sizeof(text[0]));
    Serial.println(text);
    delay(1000);
    }
  }
  delay(5);
   
  
  
}

ı tried the setPAlevel min but there is no change.In the transmitter side the write function returns true, but I can't get anything on the receiver side. Also, if I replace the cable connected to miso with the cable connected to mosi on the transmistter side, the write function still returns true. I also used adaptor ams1117

Answer 1

In the receiver code, you are just reading one byte, as 6v6gt pointed out. Check the library to see how read() works.

If you follow the getting started example, this is how you should read bytes in the receiver:

char text[32];

if (radio.available()) 
{
  uint8_t bytes = radio.getPayloadSize();  // get the size of the payload
  radio.read(&text, bytes);                // fetch payload from FIFO
}

Don't use const for text in the receiver. Also, you don't need to use stopListening and startListening in the loop(). They should just go to setup().