nRF24L01+与Arduino Nano通信异常：代码调试求助

已确认两块nRF24L01模块及两块Arduino Nano均正常工作，且使用简单测试代码可实现通信。目前尝试所有可行方案仍无法解决问题，恳请帮忙验证以下收发代码是否适配nRF24L01模块。

接收代码 #

#include "SPI.h"
#include "RF24.h"
#include "nRF24L01.h"

#define CE_PIN 9
#define CSN_PIN 10

#define INTERVAL_MS_SIGNAL_LOST 1000
#define INTERVAL_MS_SIGNAL_RETRY 250

RF24 radio(CE_PIN, CSN_PIN);

const byte address[6] = "00001";

//NRF24L01 buffer limit is 32 bytes (max struct size)
struct payload {
  byte data1;
  char data2;

  //byte pot_value;
};

payload payload;

unsigned long lastSignalMillis = 0;

void setup()
{
  Serial.begin(115200);

  radio.begin();

  //Append ACK packet from the receiving radio back to the transmitting radio
  radio.setAutoAck(false); //(true|false)
  //Set the transmission datarate
  radio.setDataRate(RF24_250KBPS); //(RF24_250KBPS|RF24_1MBPS|RF24_2MBPS)

  radio.setPALevel(RF24_PA_HIGH); //(RF24_PA_MIN|RF24_PA_LOW|RF24_PA_HIGH|RF24_PA_MAX)
  //Default value is the maximum 32 bytes
  radio.setPayloadSize(sizeof(payload));

  radio.openReadingPipe(0, address);
  radio.startListening();
}

void loop()
{
  unsigned long currentMillis = millis();

  if (radio.available()) {
    radio.read(&payload, sizeof(payload));

    Serial.println("Received");

    Serial.print("Data1:");
    Serial.println(payload.data1);

    Serial.print("Data2:");
    Serial.println(payload.data2);

    //Serial.print("Data3:");
    //Serial.println(payload.pot_value);

    lastSignalMillis = currentMillis;
  }

  if (currentMillis - lastSignalMillis > INTERVAL_MS_SIGNAL_LOST) {
    lostConnection();
  }
  delay(INTERVAL_MS_SIGNAL_RETRY);
}

void lostConnection()
{
  Serial.println("We have lost connection, preventing unwanted behavior");
}

发送代码 #

#include "SPI.h"
#include "RF24.h"
//#include <printf.h>--

#define CE_PIN 9
#define CSN_PIN 10

//#define POT_PIN

#define INTERVAL_MS_TRANSMISSION 250

RF24 radio(CE_PIN, CSN_PIN);

const byte address[6] = "00001";

//NRF24L01 buffer limit is 32 bytes (max struct size)
struct payload {
  byte data1;
  char data2;
  //byte pot_value;
};

payload payload;

void setup()
{
  Serial.begin(115200);

  if (radio.isChipConnected()) {
    radio.begin();
    Serial.println("nRF24L01 Intialiazed!");
    
    //Append ACK packet from the receiving radio back to the transmitting radio
    radio.setAutoAck(false); //(true|false)

    //Set the transmission datarate
    radio.setDataRate(RF24_250KBPS); //(RF24_250KBPS|RF24_1MBPS|RF24_2MBPS)

    radio.setPALevel(RF24_PA_HIGH); //(RF24_PA_MIN|RF24_PA_LOW|RF24_PA_HIGH|RF24_PA_MAX)

    //Default value is the maximum 32 bytes
    radio.setPayloadSize(sizeof(payload));

    radio.openWritingPipe(address);
    radio.stopListening();
  }else{
    Serial.println("No connection between nRF24L01 and Arduino! ");
  }
}

void loop()
{
  payload.data1 = 123;
  payload.data2 = 'x';

  //payload.pot_value = analogRead(POT_PIN);

  if(radio.write(&payload, sizeof(payload))) {
    Serial.print("Data1:");
    Serial.println(payload.data1);

    Serial.print("Data2:");
    Serial.println(payload.data2);

    //Serial.print("Data3:");
    //Serial.println(payload.pot_value);

    Serial.println("Sent");

  }else {
    Serial.println("Error! Payload not sent");
  }

  delay(INTERVAL_MS_TRANSMISSION);
}

代码适配性分析及问题点 #

这套代码基于RF24库开发，整体框架适配nRF24L01模块，但存在几个可能导致通信失败的细节问题：

1. 地址长度不匹配：
   nRF24L01默认地址宽度为5字节，但代码中定义了6字节的地址数组const byte address[6] = "00001"（字符串包含5个字符加终止符\0，共6字节）。收发双方未通过radio.setAddressWidth(6)明确设置地址宽度，模块会默认按5字节解析地址，导致实际通信时地址不匹配。

2. 自动ACK关闭的影响：
   代码中双方都关闭了自动ACK（radio.setAutoAck(false)），取消了nRF24L01的重传机制，信号环境不佳时极易丢包。同时，RF24库的write()方法在关闭ACK时，仅返回“是否完成发送动作”，而非“是否被接收方成功接收”，代码中基于该返回值判断发送成功的逻辑会失去准确性。

3. 发送方初始化逻辑瑕疵：
   发送方中radio.isChipConnected()的调用顺序有误，正确流程应先调用radio.begin()初始化模块，再检测芯片连接状态。当前先检测再初始化的逻辑，会导致isChipConnected()的结果不准确。

修复建议 #

• 将地址改为5字节，或在收发双方的setup()中添加radio.setAddressWidth(6)，确保地址宽度一致；
• 开启自动ACK（将radio.setAutoAck(false)改为radio.setAutoAck(true)），利用模块自带的重传机制提升通信可靠性；
• 调整发送方初始化顺序：先调用radio.begin()，再执行radio.isChipConnected()检测。

内容的提问来源于stack exchange，提问作者HSRibeiro