espnow 写二段代码 分别是发送端和接收端 控制led 开关

发送端：

#include <esp_now.h>
#include <WiFi.h>

//定义发送数据结构体
typedef struct dataPacket {
  int ledState; //LED状态，0为关闭，1为打开
} DataPacket;

DataPacket data;

// 定义发送函数
void sendData() {
  //设置MAC地址
  uint8_t broadcastAddress[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
  //发送数据
  esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &data, sizeof(DataPacket));
  if (result == ESP_OK) {
    Serial.println("Sent with success");
  } else {
    Serial.println("Error sending the data");
  }
}

void setup() {
  Serial.begin(115200);
  //初始化ESP-NOW
  if (esp_now_init() != ESP_OK) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }
  //设置回调函数
  esp_now_register_send_cb([](uint8_t *mac, esp_now_send_status_t status) {
    Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Send success" : "Send failure");
  });
  //设置对方设备MAC地址
  uint8_t peerAddress[] = {0x5C, 0xCF, 0x7F, 0x24, 0x7C, 0x84};
  //添加对方设备
  esp_now_peer_info_t peerInfo;
  memcpy(peerInfo.peer_addr, peerAddress, 6);
  peerInfo.channel = 0;
  peerInfo.encrypt = false;
  if (esp_now_add_peer(&peerInfo) != ESP_OK) {
    Serial.println("Failed to add peer");
    return;
  }
}

void loop() {
  //发送数据
  data.ledState = 1; //打开LED
  sendData();
  delay(1000);
  data.ledState = 0; //关闭LED
  sendData();
  delay(1000);
}

接收端：

#include <esp_now.h>
#include <WiFi.h>

//定义接收数据结构体
typedef struct dataPacket {
  int ledState; //LED状态，0为关闭，1为打开
} DataPacket;

DataPacket data;

//定义回调函数
void OnDataRecv(const uint8_t *mac, const uint8_t *data, int len) {
  memcpy(&data, data, sizeof(DataPacket));
  if (data.ledState == 1) {
    digitalWrite(LED_BUILTIN, HIGH); //打开LED
  } else {
    digitalWrite(LED_BUILTIN, LOW); //关闭LED
  }
}

void setup() {
  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);
  //初始化ESP-NOW
  if (esp_now_init() != ESP_OK) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }
  //设置回调函数
  esp_now_register_recv_cb(OnDataRecv);
}

void loop() {
  //等待数据接收
  delay(100);
}