simple_tx.ino

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#include <printf.h>
 
#define CE_PIN 9
#define CSN_PIN 10
RF24 radio(CE_PIN, CSN_PIN);
 
const byte ADDRESS[6] = "00001";
const char TEXT[] = "Hello world! Watchout!";
 
void setup(){
 while (!Serial);
 Serial.begin(9600);
 printf_begin();
 radio.begin();
 //radio.setAutoAck(false);
 
 radio.setDataRate(RF24_2MBPS);
 //RF24_1MBPS, RF24_2MBPS
 
 radio.setPALevel(RF24_PA_MIN);
 //RF24_PA_LOW, RF24_LOW
 
 radio.setRetries(3, 5); 
 // delay, count
 
 radio.openWritingPipe(ADDRESS);
 radio.stopListening();
 radio.printDetails();
}
 
void loop(){
 radio.write(&TEXT, sizeof(TEXT));
 delay(1000);
}