生成EPS32的FOTA代码

以下是ESP32的FOTA（固件升级）代码示例：

#include <WiFi.h>
#include <WiFiClient.h>
#include <HTTPClient.h>
#include <Update.h>

const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
const char* firmware_url = "http://your_firmware_url.bin";

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  Serial.println("Connected to WiFi");

  // 开始下载固件
  HTTPClient http;
  http.begin(firmware_url);

  int httpCode = http.GET();
  if (httpCode == HTTP_CODE_OK) {
    Serial.println("Starting firmware update...");

    // 开始升级固件
    WiFiClient client;
    Update.begin(UPDATE_SIZE_UNKNOWN);
    Update.writeStream(http.getStream(), http.getSize());

    if (Update.end()) {
      Serial.println("Firmware update successful. Rebooting...");
      ESP.restart();
    } else {
      Serial.println("Firmware update failed.");
    }
  } else {
    Serial.println("Firmware download failed.");
  }

  http.end();
}

void loop() {
  // do nothing
}

以上代码将连接到指定的WiFi网络，然后下载并安装从`firmware_url`指定的URL中获取的固件。请记得将“your_SSID”和“your_PASSWORD”替换为实际的WiFi网络名称和密码。