Cvte Msd338 512m Smart Tv Update Download May 2026

# update_server.py - Backend API server
from flask import Flask, request, jsonify
import hashlib
import os
app = Flask(name)
# update_manager.py
import os
import json
import hashlib
import requests
from datetime import datetime
from typing import Dict, Optional, Callable
import threading
class CVTEUpdateManager:
def init(self, config_path: str = "/config/update_config.json"):
self.config = self._load_config(config_path)
self.update_server = self.config.get("update_server", "https://ota.cvte.com/api")
self.device_model = "MSD338"
self.ram_size = 512  # MB
self.current_version = self._get_current_version()
self.download_path = "/storage/update_package.zip"
self.verify_path = "/storage/update_package.verify" cvte msd338 512m smart tv update download
def _load_config(self, config_path: str) -> Dict:
    """Load update configuration"""
    default_config = 
        "update_server": "https://ota.cvte.com/api",
        "auto_check": True,
        "check_interval_hours": 24,
        "download_timeout_seconds": 300,
        "max_retries": 3,
        "require_storage_space_mb": 200
try:
        with open(config_path, 'r') as f:
            config = json.load(f)
            default_config.update(config)
    except FileNotFoundError:
        # Create default config
        os.makedirs(os.path.dirname(config_path), exist_ok=True)
        with open(config_path, 'w') as f:
            json.dump(default_config, f, indent=2)
return default_config
def _get_current_version(self) -> str:
    """Get current firmware version from system"""
    try:
        with open("/etc/version", 'r') as f:
            return f.read().strip()
    except:
        return "1.0.0"  # Default version
def check_for_updates(self) -> Optional[Dict]:
    """Check if update is available from server"""
    try:
        response = requests.post(
            f"self.update_server/check",
            json=
                "model": self.device_model,
                "current_version": self.current_version,
                "ram_size": self.ram_size
            ,
            timeout=10
        )
if response.status_code == 200:
            update_info = response.json()
            if update_info.get("update_available"):
                return 
                    "version": update_info["version"],
                    "download_url": update_info["download_url"],
                    "size_mb": update_info["size_mb"],
                    "changelog": update_info.get("changelog", ""),
                    "md5_hash": update_info.get("md5_hash", ""),
                    "min_storage_mb": update_info.get("min_storage_mb", 150),
                    "release_date": update_info.get("release_date", "")
return None
except Exception as e:
        print(f"Error checking for updates: e")
        return None
def _check_storage_space(self, required_mb: int) -> bool:
    """Check if enough storage space is available"""
    try:
        stat = os.statvfs(self.download_path.rsplit('/', 1)[0])
        free_mb = (stat.f_bavail * stat.f_frsize) / (1024 * 1024)
        return free_mb >= required_mb
    except:
        return False
def _download_file(self, url: str, callback: Optional[Callable] = None) -> bool:
    """Download update file with progress tracking"""
    try:
        response = requests.get(url, stream=True, timeout=30)
        response.raise_for_status()
total_size = int(response.headers.get('content-length', 0))
        downloaded = 0
with open(self.download_path, 'wb') as f:
            for chunk in response.iter_content(chunk_size=8192):
                if chunk:
                    f.write(chunk)
                    downloaded += len(chunk)
                    if callback and total_size > 0:
                        progress = (downloaded / total_size) * 100
                        callback(progress)
return True
except Exception as e:
        print(f"Download error: e")
        return False
def _verify_checksum(self, file_path: str, expected_md5: str) -> bool:
    """Verify downloaded file integrity using MD5"""
    try:
        md5_hash = hashlib.md5()
        with open(file_path, "rb") as f:
            for chunk in iter(lambda: f.read(4096), b""):
                md5_hash.update(chunk)
computed_md5 = md5_hash.hexdigest()
        return computed_md5.lower() == expected_md5.lower()
except Exception as e:
        print(f"Verification error: e")
        return False
def download_update(self, update_info: Dict, progress_callback: Optional[Callable] = None) -> bool:
    """Download update package with verification"""
# Check storage space
    required_space = max(
        update_info["min_storage_mb"],
        update_info["size_mb"] + 50  # Extra space for extraction
    )
if not self._check_storage_space(required_space):
        raise Exception(f"Insufficient storage. Need required_spaceMB free")
# Download file
    print(f"Downloading update to self.download_path...")
    if not self._download_file(update_info["download_url"], progress_callback):
        raise Exception("Download failed")
# Verify checksum
    if not self._verify_checksum(self.download_path, update_info["md5_hash"]):
        os.remove(self.download_path)
        raise Exception("Checksum verification failed")
# Save verification info
    with open(self.verify_path, 'w') as f:
        json.dump(
            "version": update_info["version"],
            "downloaded_at": datetime.now().isoformat(),
            "size_bytes": os.path.getsize(self.download_path)
        , f)
return True
def apply_update(self) -> bool:
    """Trigger system update process"""
    if not os.path.exists(self.download_path):
        raise Exception("No update package found")
# Create update script
    update_script = "/tmp/apply_update.sh"
    with open(update_script, 'w') as f:
        f.write("""#!/bin/sh

A: Yes, using a serial TTL programmer (like CH340G) soldered to the RX/TX/GND pads on the mainboard. This is advanced. You would need to flash the bootloader via UART. # update_server