如何打开/关闭带孩子的TP链接插头（多插头）？

Question

我才刚刚开始学习Javascript，并且无法向TP Link HS300智能电源板上的各个插头发送ON / OFF命令。 tplink-smarthome-api文档说，此模型将具有children属性，如果用childId实例化了插件，它将控制与该childId关联的插座。如何向带有childid的开关发出命令？

API文档-https://www.npmjs.com/package/tplink-smarthome-api

这是我的代码，无需指定子代即可开启设备。

const { Client } = require('tplink-smarthome-api');
const fs = require('fs');
const client = new Client();
const name = "Lights"
function getDateTime() {

    var date = new Date();

    var hour = date.getHours();
    hour = (hour < 10 ? "0" : "") + hour;

    var min  = date.getMinutes();
    min = (min < 10 ? "0" : "") + min;

    var sec  = date.getSeconds();
    sec = (sec < 10 ? "0" : "") + sec;

    var year = date.getFullYear();

    var month = date.getMonth() + 1;
    month = (month < 10 ? "0" : "") + month;

    var day  = date.getDate();
    day = (day < 10 ? "0" : "") + day;

    return year + ":" + month + ":" + day + ":" + hour + ":" + min + ":" + sec;

}

function log(message){

	
	date =  getDateTime()

	msg = `${date} ${name} ${message}\n`

	fs.appendFile("/var/www/html/project/lights/log/log.txt",msg, function(err) {
	    if(err) {
	        return console.log(err);
	    }
	}); 
}

// Look for devices, log to console, and turn them on
//client.startDiscovery().on('device-new', (device) => {
//  device.getSysInfo().then(console.log);
//  device.setPowerState(true);
//});


const plug = client.getDevice({host: '192.168.1.21'}).then((device)=>{
  //device.getSysInfo().then(console.log);
});


function turnOn(){

	client.getDevice({host: '192.168.1.21'}).then((device)=>{
  		device.setPowerState(true)
  		log("turned on.")
	});

}

function turnOff(){

	client.getDevice({host: '192.168.1.21'}).then((device)=>{
  		device.setPowerState(false)
  		log("turned off.")
	});
	
}


function displayStats(stats) {

  if(stats.relay_state == 0){
  	//Turn on
  	turnOn()
  }

}

function toggle(callback){

	client.getDevice({host: '192.168.1.21'}).then((device) => {
	  device.getSysInfo().then(displayStats);
	});

}



toggle()

在此先感谢您能提供的任何帮助，

编辑：明白了。

const { Client } = require('tplink-smarthome-api');
 
const client = new Client();

const plug = client.getDevice({host: '192.168.1.101'}).then((device)=>{

  device.setPowerState(true, {childId: 'CHILD_ID'}).then(console.log);

});