HomeBridge

利用TypeScript编写一个简单的Homebridge插件

2019-05-19  本文已影响0人  Songzh

前言

本教程是通过TypeScript编写的hb-plugin,这是一个简单的教程,但是需要具备编程基础。为什么用typescript,因为ts支持异步函数,避免产生大量的回调。


homebridge

A.需求分析

需求:实现在homekit中去控制一盏灯的开关。
分析:基于homebridge框架进行开发,利用socket跟主机进行网络通信,进而实现控制。

homebridge原理图

B.前期准备

C.进行开发

1. 注册Accessory设备

将Light插件注入到homebridge,Lightbulb是一个对象

// 注册Accessory设备
export default function(homebridge: any) {
  Service = homebridge.hap.Service;
  Characteristic = homebridge.hap.Characteristic;
  homebridge.registerAccessory("homebridge-Lightbulb", "Lightbulb", Lightbulb);
}
2. 实例化Service服务

注册switch时涉及到的两个service:

constructor(log, config) {
    this.log = log;
    this.name = config["name"];

    const informationService = new Service.AccessoryInformation();
    const LightbulbService = new Service.Lightbulb(this.name);
    LightbulbService
      .getCharacteristic(Characteristic.On)
      .on("get", this.getLightOnCharacteristic.bind(this))
      .on("set", this.setLightOnCharacteristic.bind(this));
    this.LightbulbService = LightbulbService;

  }

  getServices() {
    const { LightbulbService } = this;
    return [LightbulbService];
  }
homekit支持的Accessory
3. 实例化Characteristic

就是将上面注册的Service中的getCharacteristic这一部分具体实现。在编程上的意思就是,实现声明函数的方法。

// get请求  
  getLightOnCharacteristic(callback: (arg0: any) => void) {
    console.log("**************Get on Function**************");
    callback(null);
  }

// set请求 
  setLightOnCharacteristic(on: boolean, callback: (arg0: any) => void) {
    console.log("**************Set on Function:" + on + "**************");

    if (on) {
      this.socket.write(onbuf);
    } else {
      this.socket.write(offbuf);
    }
    setTimeout(function() {
      console.log(inibuf);
    }, 500); //500ms Rest init statue

    callback(null);
  }
4.建立socket

这一部分需要先导入typescript的net包,然后要在构造函数里创建。

  constructor(log, config) {
    this.log = log;
    this.name = config["name"];

    this.socket = new net.Socket();
    this.socket.connect(8989, "localhost", function() {
      console.log("Connecte Server OK!"); 
    });
    this.socket.on("error", console.error); // logs socket error messages
  }

5.完整代码

//mySwitch完整index.js代码
import net from "net";

let Service: any, Characteristic: any;
let onbuf = "turn on"; //cmd: turn on
let offbuf = "turn off"; //cmd: turn off
let inibuf = "check"; //cmd: reset


// 注册Accessory设备
export default function(homebridge: any) {
  Service = homebridge.hap.Service;
  Characteristic = homebridge.hap.Characteristic;
  homebridge.registerAccessory("homebridge-Lightbulb", "Lightbulb", Lightbulb);
}

class Lightbulb {
  log: Function;
  name: string;
  LightbulbService: any;
  socket: net.Socket;

  constructor(log, config) {
    this.log = log;
    this.name = config["name"];

    const informationService = new Service.AccessoryInformation();
    const LightbulbService = new Service.Lightbulb(this.name);
    LightbulbService
      .getCharacteristic(Characteristic.On)
      .on("get", this.getLightOnCharacteristic.bind(this))
      .on("set", this.setLightOnCharacteristic.bind(this));
    this.LightbulbService = LightbulbService;

    this.socket = new net.Socket();
    this.socket.connect(8989, "localhost", function() {
      console.log("Connecte Server OK!"); //connect ser2net
    });
    this.socket.on("error", console.error); // logs socket error messages
  }

  getServices() {
    const { LightbulbService } = this;
    return [LightbulbService];
  }

  getLightOnCharacteristic(callback: (arg0: any) => void) {
    console.log("**************Get on Function**************");
    callback(null);
  }

  setLightOnCharacteristic(on: boolean, callback: (arg0: any) => void) {
    console.log("**************Set on Function:" + on + "**************");

    if (on) {
      this.socket.write(onbuf);
    } else {
      this.socket.write(offbuf);
    }

    setTimeout(function() {
      console.log(inibuf);
    }, 500); //500ms Rest init statue

    callback(null);
  }
}

6. 打包编译

由于使用的是typescript,所以要利用rollup和babel将其编译成js,这样homebridge才能识别你的插件。
这一步挺难的,因为要配置一些乱七八糟的,我自己也没搞懂,所以大家上github看我的demo配置就好了。

7. 其他

大致开发的流程就是这样,不是太理解的可以先运行我写的插件homebridge-lightbulb-ts-demo

  1. 去github上下载我上传的项目,别忘记给个star
  2. 在你解压后的文件夹下运行,npm install
  3. 然后运行npm run build
  4. 编译完毕后,如果没问题的话,把这个文件夹放到与homebridge平级的目录下。


    image.png
  5. 配置config.json


    config.json
{
  "bridge": {
      "name": "Homebridge",
      "username": "94:A1:A2:BE:0B:30",
      "port": 59376,
      "pin": "031-45-666"
  },
  "accessories": [
      {
          "accessory": "MyLightbulb",
          "name": "灯"
      }
  ],
  "platforms": []
}
  1. 在cmd窗口运行homebridge

    运行成功
  2. 扫二维码添加设备


    succeess
  3. 习题
    ok,now you can use siri to control your light,it will very fun.
    你可以将这个灯更改为调光灯

  4. 交流群
    homebridge交流群:107927710

8. 参考文献

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