.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/%E6%8A%80%E6%9C%AF%E6%A0%88.md

Web Bluetooth API（navigator.bluetooth.requestDevice / GATT Server + Characteristic + notify），配合 File System Access API（showOpenFilePicker）支持热重载；通过 0xA1 ACK + 64 窗口 ACK_WINDOW 实现流控。