首先确保NRF24L01模块正确连接。然后，使用以下代码设置和发送数据：

在Arduino Uno上：

#include 
#include 
#include 

RF24 radio(9, 10);    // 连接CE和CSN引脚

const byte address[6] = "00001";

void setup() {
  Serial.begin(9600);

  radio.begin();
  radio.openWritingPipe(address);
  radio.setPALevel(RF24_PA_MAX);
  radio.stopListening();
}

void loop() {
  const char text[] = "Hello World";
  radio.write(&text, sizeof(text));
  Serial.println("Sent message: Hello World");

  delay(1000);
}

在Raspberry Pi 4上：

import RPi.GPIO as GPIO
from lib_nrf24 import NRF24

pipes = [[0xe7, 0xe7, 0xe7, 0xe7, 0xe7], [0xc2, 0xc2, 0xc2, 0xc2, 0xc2]]

radio = NRF24(GPIO.BOARD, 10, 8)  # 连接CE和CSN引脚
radio.begin(0, 0)
radio.setPayloadSize(8)
radio.setChannel(0x76)
radio.setDataRate(NRF24.BR_1MBPS)
radio.setPALevel(NRF24.PA_MAX)
radio.setAutoAck(True)
radio.enableDynamicPayloads()
radio.enableAckPayload()

radio.openReadingPipe(1, pipes[1])
radio.printDetails()
radio.startListening()

while True:
    while not radio.available(0):
        pass

    receivedMessage = []
    radio.read(receivedMessage, radio.getDynamicPayloadSize())
    print("Received message: {}".format(receivedMessage))
    print("Translating our receivedMessage into unicode characters...")
    string = ""

    for n in receivedMessage:
        if (n >= 32 and n <= 126):
            string += chr(n)

    print("Our received message decodes to: {}".format(string))

请注意，这些代码适用于单向通信。如果您需要双向通信，请在Arduino Uno上设置和打开另一个管道，并在Raspberry Pi 4上处理接收到的数据并回复。