能否用Google Local Home SDK向BrightSign播放器发送UDP十六进制指令?
使用Google Local Home SDK向BrightSign播放器发送HEX格式UDP指令
可行性确认
完全可以实现。Google Local Home SDK的核心能力之一就是支持与本地设备通过UDP/TCP协议通信,不管设备是不是标准智能设备,只要它能在本地网络监听指定UDP端口(这里是5000)并接收HEX指令,就能通过SDK完成控制。
核心实现思路
- 在Google Actions Console中创建自定义设备类型(因为BrightSign不是标准智能设备)
- 编写Local Home SDK驱动代码,实现UDP指令的发送逻辑
- 将驱动关联到你的Action,完成部署和本地测试
TypeScript简化实现示例
适合新手的基础版本,包含指令发送和简单设备发现逻辑:
import { DeviceManager, UdpSocket } from '@google/local-home-sdk'; // 处理指令执行(比如语音触发的"播放"命令) export const onExecute = async (handler: any) => { const deviceManager = handler.deviceManager as DeviceManager; const targetDevices = handler.devices; for (const device of targetDevices) { // 从设备信息中获取本地IP(需在发现阶段存储) const deviceIp = device.localIpAddress; const udpPort = 5000; // BrightSign默认UDP端口 // 替换为你需要发送的HEX指令字符串 const targetHexCmd = "01020304"; // 把HEX字符串转成UDP发送需要的Uint8Array const cmdBuffer = hexToUint8Array(targetHexCmd); try { // 创建UDP套接字并发送指令 const socket = new UdpSocket(); await socket.send(cmdBuffer, udpPort, deviceIp); socket.close(); // 告知Google指令执行成功 await deviceManager.sendCommandResults([{ ids: [device.id], status: "SUCCESS", states: { on: true } // 对应指令的状态,可按需调整 }]); } catch (err) { console.error("UDP指令发送失败:", err); await deviceManager.sendCommandResults([{ ids: [device.id], status: "ERROR", errorCode: "DEVICE_UNREACHABLE" }]); } } }; // 辅助工具:HEX字符串转Uint8Array function hexToUint8Array(hexStr: string): Uint8Array { const arr = new Uint8Array(hexStr.length / 2); for (let i = 0; i < hexStr.length; i += 2) { arr[i / 2] = parseInt(hexStr.substring(i, i + 2), 16); } return arr; } // 设备发现逻辑(简化版,手动指定IP,实际可通过UDP广播实现) export const onIdentify = async (handler: any) => { const deviceManager = handler.deviceManager as DeviceManager; // 替换为你的BrightSign播放器实际本地IP const foundDevices = [{ id: "brightsign-player-001", deviceType: "action.devices.types.MEDIA_PLAYER", // 选合适的设备类型 localIpAddress: "192.168.1.105" }]; await deviceManager.sendIdentifyResults(foundDevices); };
JavaScript简化实现示例
如果更习惯用JavaScript,对应版本代码:
// 处理指令执行 exports.onExecute = async (handler) => { const deviceManager = handler.deviceManager; const targetDevices = handler.devices; for (const device of targetDevices) { const deviceIp = device.localIpAddress; const udpPort = 5000; // 替换为实际要发送的HEX指令 const targetHexCmd = "01020304"; const cmdBuffer = hexToUint8Array(targetHexCmd); try { const socket = new handler.sdk.UdpSocket(); await socket.send(cmdBuffer, udpPort, deviceIp); socket.close(); await deviceManager.sendCommandResults([{ ids: [device.id], status: "SUCCESS", states: { on: true } }]); } catch (err) { console.error("UDP指令发送失败:", err); await deviceManager.sendCommandResults([{ ids: [device.id], status: "ERROR", errorCode: "DEVICE_UNREACHABLE" }]); } } }; // HEX转Uint8Array工具函数 function hexToUint8Array(hexStr) { const arr = new Uint8Array(hexStr.length / 2); for (let i = 0; i < hexStr.length; i += 2) { arr[i / 2] = parseInt(hexStr.substring(i, i + 2), 16); } return arr; } // 设备发现逻辑 exports.onIdentify = async (handler) => { const deviceManager = handler.deviceManager; const foundDevices = [{ id: "brightsign-player-001", deviceType: "action.devices.types.MEDIA_PLAYER", localIpAddress: "192.168.1.105" }]; await deviceManager.sendIdentifyResults(foundDevices); };
关键注意点
- 确保BrightSign播放器和Nest Hub在同一本地局域网内
- 必须把示例中的
targetHexCmd替换为你的BrightSign实际需要的HEX指令 - 设备发现阶段如果要自动识别,可通过UDP广播实现(比如发送特定查询包,监听BrightSign的响应)
- 在Actions Console中配置设备traits时,要和你的语音指令对应(比如用
OnOfftrait对应"打开/关闭"指令)
内容的提问来源于stack exchange,提问作者RichieRich1891
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