Arduino Uno ile NRF24L01 Kullanımı

NRF24L01 2.4 Ghz'de çalışan 125 kanala sahip bir kablosuz alıcı/verici modülüdür. 2Mbps'ye kadar veri hızına 100Mt'ye kadar iletişim mesafesine sahiptir. SPI ile veri transferi sağlar.

Yukarıdaki gibi devreyi kuralım. Arduino IDE ye RF24 kütüphanesini kuralım.

Alıcı Kodu:

/*
 * NRF24L01      Arduino_ Uno    Arduino_Mega    Blue_Pill(stm32f01C)
 * __________________________________________________________________________
 * VCC        |       3.3v      |     3.3v      |     3.3v
 * GND        |       GND       |     GND       |      GND
 * CSN        |   Pin10 SPI/SS  | Pin10 SPI/SS  |     A4 NSS1 (PA4) 3.3v
 * CE         |   Pin9          | Pin9          |     B0 digital (PB0) 3.3v
 * SCK        |   Pin13         | Pin52         |     A5 SCK1   (PA5) 3.3v
 * MOSI       |   Pin11         | Pin51         |     A7 MOSI1  (PA7) 3.3v
 * MISO       |   Pin12         | Pin50         |     A6 MISO1  (PA6) 3.3v
 */

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

RF24 radio(9, 10);  // CE, CSN
//RF24 radio(PB0, PA4); // CE, CSN on Blue Pill
//RF24 radio(PA4, PA3);//stm

const uint64_t address = 0x5443322110ULL;
boolean button_state = 0;

void setup() {
  //pinMode(PC13, OUTPUT);//stm
  pinMode(13, OUTPUT);
  Serial.begin(115200);
  radio.begin();
  radio.setChannel(76);
  radio.setAutoAck(1, true);
  radio.setDataRate(RF24_1MBPS);
  radio.setCRCLength(RF24_CRC_8);
  
  Serial.print("ADDRESS :");
  radio.openReadingPipe(0, address);  //Setting the address at which we will receive the data
  radio.setPALevel(RF24_PA_MIN);      
  radio.enableDynamicPayloads();      // *** Dynamic Payload aktif et ***
  radio.startListening();             //This sets the module as receiver
}

void loop() {
  if (radio.available()) {
    char text[32] = ""; 
    radio.read(&text, sizeof(text));
    radio.read(&button_state, sizeof(button_state));
    
    if (button_state == HIGH) {
      digitalWrite(13, HIGH);
      Serial.println(text);
    } else {
      digitalWrite(13, LOW);
      Serial.println(text);
    }
  }
  delay(5);
}
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Verici Kodu:

/*
 * NRF24L01      Arduino_ Uno    Arduino_Mega    Blue_Pill(stm32f01C)
 * __________________________________________________________________________
 * VCC        |       3.3v      |     3.3v      |     3.3v
 * GND        |       GND       |     GND       |      GND
 * CSN        |   Pin10 SPI/SS  | Pin10 SPI/SS  |     A4 NSS1 (PA4) 3.3v
 * CE         |   Pin9          | Pin9          |     B0 digital (PB0) 3.3v
 * SCK        |   Pin13         | Pin52         |     A5 SCK1   (PA5) 3.3v
 * MOSI       |   Pin11         | Pin51         |     A7 MOSI1  (PA7) 3.3v
 * MISO       |   Pin12         | Pin50         |     A6 MISO1  (PA6) 3.3v
 */

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

RF24 radio(9, 10); // CE, CSN
const uint64_t address = 0x5443322110ULL;
int button_pin = 2;
boolean button_state = 0;

void setup() {
  pinMode(button_pin, INPUT);
  radio.begin(); 
  radio.setDataRate(RF24_1MBPS);
  radio.setChannel(76);
  radio.openWritingPipe(address); 
  radio.setPALevel(RF24_PA_MIN);
  radio.stopListening();          //This sets the module as transmitter
}

void loop() {
  button_state = digitalRead(button_pin);
  
  if(button_state == HIGH) {
    const char text[] = "Your Button State is HIGH";
    radio.write(&text, sizeof(text));
  } else {
    const char text[] = "Your Button State is LOW";
    radio.write(&text, sizeof(text));
  }
  
  radio.write(&button_state, sizeof(button_state));
  delay(1000);
}
Kopyala