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。
B.前期准备
- vs code
- homebridge环境 Win10快速搭建Homebridge环境
- ios设备
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:
- AccessoryInformation service:每个Accessory都需要广播与设备本身相关的信息,无论其类型如何;它包含了Manufacturer(生产厂家)、SerialNumber(序列号)等特性
- Lightbulb service:真正的灯光service,Lightbulb设备具有布尔特性On,百分比特性Brightness 等;这里我们只做一个开关灯。
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。
- 去github上下载我上传的项目,别忘记给个star
- 在你解压后的文件夹下运行,
npm install
- 然后运行
npm run build
-
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 -
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": []
}
-
在cmd窗口运行
运行成功homebridge
-
扫二维码添加设备
succeess -
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 -
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