Question

这个项目使用Apples homekit和raspberry pi（https://github.com/KhaosT/HAP-NodeJS）上的node.js服务器来打开/关闭设备。所以Light_accessory.js，当vaule为真（1）时，使用子进程和接线pi打开灯（继电器）。当值为假（0）时，它还需要关闭灯（gpio写入7 1）。我尝试添加＆＃34;可能等于＆＃34;这样它也可以关闭灯泡（继电器）。试图添加两个值是由于我和一夜的谷歌搜索和语法错误.. 我花了更多的时间在这个项目上比我想承认的更多..相当简单的目标非常类似于我用PHP做了一段时间的项目。

?php 
    if(isset($_GET['trigger']) && $_GET['trigger'] == 1) {
        error_reporting(E_ALL);
        exec('gpio write 7 0');
    }
    if(isset($_GET['trigger']) && $_GET['trigger'] == 2) {
        error_reporting(E_ALL);
        exec('gpio write 7 1');
    }
?>

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当值为true（1）时，这是将gpio设置为低（gpio写入7 0）的位置。

{
            cType: types.POWER_STATE_CTYPE,
            onUpdate: function(value) {
                exec('gpio write 7 0' + value,function(error, stdout, stderr) {}
                );
            },
            perms: ["pw", "pr", "ev"],
            format: "bool",
            initialValue: false,
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Turn On the Light",
            designedMaxLength: 1
        }, {

如何添加

exec('gpio write 7 1'(error, stdout, stderr)

当javascript中的值为0时？这样灯（继电器）也会关闭。

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Light_accessory.js的粗略概述;最重要的部分主要是产品描述而不是实际功能。＆＃34; cType：types.POWER_STATE_CTYPE，＆＃34;在＆＃34; OnUpdate：＆＃34;是神奇发生的地方。

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完整的Light_accessory脚本

// HomeKit types required
var types = require("./types.js")
var exports = module.exports = {};
var exec = require('child_process').exec;

var execute = function(accessory, characteristic, value) {
    console.log("executed accessory: " + accessory + ", and characteristic: " + characteristic + ", with value: " + value + ".");
}

exports.accessory = {
    displayName: "Light 1",
    username: "1A:2B:3C:4D:5E:FF",
    pincode: "031-45-154",
    services: [{
        sType: types.ACCESSORY_INFORMATION_STYPE,
        characteristics: [{
            cType: types.NAME_CTYPE,
            onUpdate: null,
            perms: ["pr"],
            format: "string",
            initialValue: "Light 1",
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Bla",
            designedMaxLength: 255
        }, {
            cType: types.MANUFACTURER_CTYPE,
            onUpdate: null,
            perms: ["pr"],
            format: "string",
            initialValue: "Oltica",
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Bla",
            designedMaxLength: 255
        }, {
            cType: types.MODEL_CTYPE,
            onUpdate: null,
            perms: ["pr"],
            format: "string",
            initialValue: "Rev-1",
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Bla",
            designedMaxLength: 255
        }, {
            cType: types.SERIAL_NUMBER_CTYPE,
            onUpdate: null,
            perms: ["pr"],
            format: "string",
            initialValue: "A1S2NASF88EW",
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Bla",
            designedMaxLength: 255
        }, {
            cType: types.IDENTIFY_CTYPE,
            onUpdate: null,
            perms: ["pw"],
            format: "bool",
            initialValue: false,
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Identify Accessory",
            designedMaxLength: 1
        }]
    }, {
        sType: types.LIGHTBULB_STYPE,
        characteristics: [{
            cType: types.NAME_CTYPE,
            onUpdate: null,
            perms: ["pr"],
            format: "string",
            initialValue: "Light 1",
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Bla",
            designedMaxLength: 255
        }, {
            cType: types.POWER_STATE_CTYPE,
            onUpdate: function(value) {
                exec('gpio write 7 0' + value,function(error, stdout, stderr) {}
                );
            },
            perms: ["pw", "pr", "ev"],
            format: "bool",
            initialValue: false,
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Turn On the Light",
            designedMaxLength: 1
        }, {
            cType: types.HUE_CTYPE,
            onUpdate: function(value) {
                console.log("Change:", value);
                execute("Test Accessory 1", "Light - Hue", value);
            },
            perms: ["pw", "pr", "ev"],
            format: "int",
            initialValue: 0,
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Adjust Hue of Light",
            designedMinValue: 0,
            designedMaxValue: 360,
            designedMinStep: 1,
            unit: "arcdegrees"
        }, {
            cType: types.BRIGHTNESS_CTYPE,
            onUpdate: function(value) {
                console.log("Change:", value);
                execute("Test Accessory 1", "Light - Brightness", value);
            },
            perms: ["pw", "pr", "ev"],
            format: "int",
            initialValue: 0,
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Adjust Brightness of Light",
            designedMinValue: 0,
            designedMaxValue: 100,
            designedMinStep: 1,
            unit: "%"
        }, {
            cType: types.SATURATION_CTYPE,
            onUpdate: function(value) {
                console.log("Change:", value);
                execute("Test Accessory 1", "Light - Saturation", value);
            },
            perms: ["pw", "pr", "ev"],
            format: "int",
            initialValue: 0,
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Adjust Saturation of Light",
            designedMinValue: 0,
            designedMaxValue: 100,
            designedMinStep: 1,
            unit: "%"
        }]
    }]
}

Answer 1

弗洛姆自己搞乱这个包裹，我注意到它的价值是真的＆＃39;或者＆＃39; false＆＃39;不是1或0

尝试检查是否然后写出1

value == true ? 1 : 0

根据要求，这里使用您的示例。 { cType: types.POWER_STATE_CTYPE, onUpdate: function(value) { exec('gpio write 7 0 ' + (value == true ? 1 : 0) ,function(error, stdout, stderr) {} ); }, perms: ["pw", "pr", "ev"], format: "bool", initialValue: false, supportEvents: false, supportBonjour: false, manfDescription: "Turn On the Light", designedMaxLength: 1 }

Answer 2

{
            cType: types.POWER_STATE_CTYPE,
            onUpdate: function(value) {
                if(value == 1){
                    exec('gpio write 7 0')
                    setTimeout(function() {exec('gpio write 7 1')},250)

                }
                if(value == 0){
                    exec('gpio write 6 0')
                    setTimeout(function() {exec('gpio write 6 1')},250)
                }
            },
            perms: ["pw", "pr", "ev"],
            format: "bool",
            initialValue: false,
            supportEvents: false,
            supportBonjour: false,
            manfDescription: "Turn On the Light",
            designedMaxLength: 1
        },

很难理解Javascript中的“可能等于”

2 个答案: