.qoder/repowiki/knowledge/zh/ESP32%20DCU%20%E8%B0%83%E8%AF%95%E6%8E%A7%E5%88%B6%E5%8F%B0%E4%BB%93%E5%BA%93%E6%A0%B9/ESP32%20DCU%20%E5%89%8D%E7%AB%AF%20Web%20%E6%8E%A7%E5%88%B6%E5%8F%B0%E9%9B%86%E5%90%88/BLE%20%E9%80%9A%E9%81%93%20OTA%20%E5%AE%A2%E6%88%B7%E7%AB%AF%EF%BC%88Web%20Bluetooth%20GATT%EF%BC%89/%E7%89%B9%E6%AE%8A%E9%85%8D%E7%BD%AE%E4%B8%8E%E5%91%BD%E4%BB%A4.md

BLE 连接必须在用户手势内触发（click handler 中使用 `e.preventDefault()` 保证 navigator.bluetooth.requestDevice 合法）；需浏览器启用 `web-bluetooth` 权限并过滤 namePrefix 为 'ESP32-OTA'。