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  • 深入理解Amazon Alexa Skill(四)

    本节利用三星Smartthings Classic物联网平台的web service smartapp,实现了一个Alexa智能家居skill的例子,由此来了解Alexa是如何控制其他云的智能家居设备的。

    三星Smartthings平台是如何运行第三方云来控制其设备的

    三星Smartthings Classic支持开发者自己编写SmartApp来控制智能家居设备。参考官网中Web Service SmartApps的教程就可以写一个允许使用Web API来远程控制该平台设备的SmartApp。简单来说,SmartApp是Groovy写的运行在Smartthings云上的沙盒中代码,该代码被用户安装得到授权后可以操作、监听用户的设备,并且允许向外自定义开放URL,即开发者可以用代码在SmartApp中处理发过来的HTTP请求参数,进而自定义控制设备;同时,SmartApp也可以自定义响应请求返回设备状态,甚至发送HTTP请求主动给Alexa上报设备状态。

    那么,三星如何验证发来的消息呢?答案是使用Oauth。Web Service SmartApps在创建时会有OAuth的Client ID和Secret,使用这两个参数来向三星特定的URL请求获得access token,就可以向该SmartApp开放的URL发送消息了。在OAuth的时候,会让用户选择允许该token访问哪些设备资源。Smartthings还允许创建虚拟设备,所以测试起来非常方便,过多不赘述,详见官网。

    Alexa中Skill是如何向其注册设备、控制设备的

    亚马逊给出了一个Python的Smart home skill例子,并且有详细的说明,其中用到的AWS服务也都有免费额度的,不用担心扣钱。

    1. Alexa Smart Home Skill创建时首先需要设置好OAuth的信息,例如Authorization URI、Access Token URI、Client ID、Client Secret、Scope等,这些都可以从Smartthing的文档中找到。Alexa云会在用户enable skill的时候自动完成OAuth流程,不需要开发者自己来实现OAuth流程,同时,token也返回给了Alexa云。Skill只有在接到用户intent的时候,才会收到由Alexa云发来的对应的access token。

    2. 设备发现:在用户enable并关联账号后,首先会进入设备发现步骤,skill要把被控云(Smartthing)上该用户都有什么设备报告给Alexa云,换句话说,两个云的设备要有一个身份的映射,这样用户只用Alexa的App就可以看到他各种品牌的物联网设备的状态了。Alexa在设备发现时会发送Discover命令给Skill,并携带token。Skill这时候拿着token去SmartApp开放的URL去查询都有哪些设备,然后根据得到的内容回复如下内容给Alexa,关键的有这么几个:

      • endpointId:设备的唯一标识号。应该在该用户的skill中唯一,类似于设备ID。
      • friendlyName:用户在Alexa App中看到的设备的名字。测试发现Alexa App中有一个BUG,friendlyName若重名,在Alexa App中显示面板中后发现的设备会覆盖掉之前同名的设备,用户没有方法分辨。因此,恶意的skill就有机会伪造用户之前的已发现的设备的状态,但是也称不上一个安全漏洞。
      • manufacturerName、description:Alexa App中看到的设备详细信息,可以随意填写,随意伪造。导致恶意Skill可以在Alexa中随便号称该设备就是Smartthing生产的,结合伪造的friendlyName,使用户完全无法分辨真实skill上报的设备是否被恶意顶替了。
      • displayCategories:说明设备的类型,必须是Alexa预定义的类型之一。
      • capabilities:设备支持的能力,如开关,亮度,以及该能力是否可被主动询问获得,等等。这也是Alexa预定义好的。
    3. 控制与消息上报
      在Echo收到用户的语音命令后(Smart home语音命令不能被定制),Alexa会发送特定的命令(directive),命令中携带了要操作的设备的唯一 标识endpoint以及用户在被控云的access token,skill程序只要向被控云特定的URL接口发送指令即可。
      SmartApp也可以在获得了用户的亚马逊token后,向特定的event结点主动报告更新设备的状态。

    {
        "directive": {
            "header": {
                "namespace": "Alexa.Discovery",
                "name": "Discover",
                "payloadVersion": "3",
                "messageId": "1bd5d003-31b9-476f-ad03-71d471922820"
            },
            "payload": {
                "scope": {
                    "type": "BearerToken",
                    "token": "access-token-from-skill"
                }
            }
        }
    }
    
    {
      "event": {
        "header": {
          "correlationToken": "12345692749237492",
          "messageId": "1bd5d003-31b9-476f-ad03-71d471922820",
          "name": "Discover.Response",
          "namespace": "Alexa.Discovery",
          "payloadVersion": "3"
        },
        "payload": {
          "endpoints": [
            {
              "endpointId": "demo_id",
              "manufacturerName": "Smart Device Company",
              "friendlyName": "Bedroom Outlet",
              "description": "Smart Device Switch",
              "displayCategories": ["SWITCH"],
              "cookie": {
                "key1": "arbitrary key/value pairs for skill to reference this endpoint.",
                "key2": "There can be multiple entries",
                "key3": "but they should only be used for reference purposes.",
                "key4": "This is not a suitable place to maintain current endpoint state."
              },
              "capabilities": [
                {
                  "type": "AlexaInterface",
                  "interface": "Alexa",
                  "version": "3"
                },
                {
                  "interface": "Alexa.PowerController",
                  "version": "3",
                  "type": "AlexaInterface",
                  "properties": {
                    "supported": [
                      {
                        "name": "powerState"
                      }
                    ],
                    "retrievable": true
                  }
                }
              ]
            }
          ]
        }
      }
    }
    

    关于设备身份映射的解释

    虽然恶意skill有可能在Alexa App中顶替到其他skill创建的设备,但是用户在Web控制页面和设置routine时能够看到是两个不同的设备。通过查看web页面的网络流量,发现Alexa在真正标识设备时加入了skill的id作为前缀(base64编码)来防止恶意skill之间冲突上报设备信息,Alexa中表示设备信息的数据结构见附录(从浏览器调试中获得)。

    另外还有一个小问题是用户语音UI如何准确的翻译到要控制哪个设备,如有相似或同名,似乎Alexa会额外询问到底要选择控制哪一个,这点没有深入测试。

    
    

    附录代码

    Smartapp

    /**
     *   My web smartapp
     *
     *  Copyright 2019 Ascii0x03
     *
     *  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
     *  in compliance with the License. You may obtain a copy of the License at:
     *
     *      http://www.apache.org/licenses/LICENSE-2.0
     *
     *  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
     *  on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
     *  for the specific language governing permissions and limitations under the License.
     *
     */
    definition(
        name: " My web smartapp",
        namespace: "J_unique_Namespace",
        author: "Ascii0x03",
        description: "web smartapp for alexa",
        category: "My Apps",
        iconUrl: "https://s3.amazonaws.com/smartapp-icons/Convenience/Cat-Convenience.png",
        iconX2Url: "https://s3.amazonaws.com/smartapp-icons/Convenience/Cat-Convenience@2x.png",
        iconX3Url: "https://s3.amazonaws.com/smartapp-icons/Convenience/Cat-Convenience@2x.png")
    
    preferences {
      section ("Allow external service to control these things1...") {
        input "switches", "capability.switch", multiple: true, required: true
      }
    }
    mappings {
      path("/switches") {
        action: [
          GET: "listSwitches"
        ]
      }
      path("/switches/:command") {
        action: [
          PUT: "updateSwitches"
        ]
      }
      path("/switches/:deviceid/:command") {
        action: [
          PUT: "updateASwitch"
        ]
      }
      path("/amazontoken/:accesstoken/:refreshtoken") {
      	action: [GET: "getAmzToken"]
      }
    }
    
    
    def installed() {
    	log.debug "Installed with settings: ${settings}"
    	initialize()
    }
    
    def updated() {
    	log.debug "Updated with settings: ${settings}"
    
    	//unsubscribe()
    	initialize()
    }
    
    def initialize() {
    	// TODO: subscribe to attributes, devices, locations, etc.
        subscribe(switches, "switch", eventDetectedHandler)
        //subscribe(switch2, "switch.on", eventDetectedHandler)
        //subscribe(switch1, "switch.off", eventDetectedHandler)
        //subscribe(switch2, "switch.off", eventDetectedHandler)
    }
    
    // returns a list like
    // [[name: "kitchen lamp", value: "off"], [name: "bathroom", value: "on"]]
    def listSwitches() {
    	def resp = []
        //def resp = [value:switch1.currentValue("switch")]
        switches.each {
          resp << [name: it.displayName, value: it.currentValue("switch")]
        }
        return resp
    }
    
    void updateSwitches() {
        // use the built-in request object to get the command parameter
        def command = params.command
    	
        // all switches have the command
        // execute the command on all switches
        // (note we can do this on the array - the command will be invoked on every element
        switch(command) {
            case "ON":
                switches.on()
                report_state_to_amazon("ON", "switch1")
                break
            case "OFF":
                switches.off()
                report_state_to_amazon("OFF", "switch1")
                break
            default:
                httpError(400, "$command is not a valid command for all switches specified")
        }
    }
    void updateASwitch() {
        def command = params.command
        def deviceid = params.deviceid
        	switches.each {
        		if(it.displayName == deviceid) {
            		switch(command) {
            		case "ON":
                		it.on()
                        report_state_to_amazon("ON", deviceid)
                		break
            		case "OFF":
                		it.off()
                        report_state_to_amazon("OFF", deviceid)
                		break
            		default:
                		httpError(400, "$command is not a valid command for $deviceid specified")
        			}
                }
        	}         
    }
    def getAmzToken() {
    	def accesstoken = params.accesstoken
        def refreshtoken = params.refreshtoken
        log.debug "accesstoken: $accesstoken"
        state.amzaccesstoken = accesstoken
        state.amzrefreshtoken = refreshtoken
    }
    
    def report_state_to_amazon(state_value, endpoint_id) {
    	pause(3000)
    	def amz_url = "https://api.amazonalexa.com/v3/events"
        def sensor_value = "DETECTED"
        if( state_value == "OFF"){
    		sensor_value = "NOT_DETECTED"    
        }
        def body = """
    {
      "context": {
        "properties": [
          {
            "namespace": "Alexa.BrightnessController",
            "name": "brightness",
            "value": 85,
            "timeOfSample": "2017-02-03T16:20:50.52Z",
            "uncertaintyInMilliseconds": 60000
          }
        ]
      },
      "event": {
        "header": {
          "messageId": "c50bbb73-1ee8-44f8-af9b-19a0a2195474",
          "namespace": "Alexa",
          "name": "ChangeReport",
          "payloadVersion": "3"
        },
        "endpoint": {
          "scope": {
            "type":"BearerToken",
            "token":"$state.amzaccesstoken"
           },
           "endpointId" :  "$endpoint_id"
        },
        "payload": {
          "change": {
            "cause": {
              "type": "PHYSICAL_INTERACTION"
            },
            "properties": [
              {
                "namespace": "Alexa.PowerController",
                "name": "powerState",
                "value": "$state_value",
                "timeOfSample": "2019-04-16T16:20:50.52Z",
                "uncertaintyInMilliseconds": 0
              },
              {
                "namespace": "Alexa.ContactSensor",
                "name": "detectionState",
                "value": "$sensor_value",
                "timeOfSample": "2019-04-16T16:20:50.52Z",
                "uncertaintyInMilliseconds": 0
              }
            ]
          }
        }
      }
    }
    """
        def params = [
        	uri: amz_url,
        	headers: ["Authorization":"Bearer " + state.amzaccesstoken],
            contentType:"application/json",
            body:body
    	]
    	log.debug state.amzaccesstoken
    //    try {
        	httpPost(params) { resp ->
            //log.debug "response data: ${resp.statusCode}"
            //log.debug "response contentType: ${resp.contentType}"
        }
    //    } catch (e) {
    //        log.debug "something went wrong sending http to Amazon: $e"
     //   }
    }
    // TODO: implement event handlers
    def eventDetectedHandler(evt) {
        log.debug "DetectedHandler called: $evt"
        //log.debug evt.getDevice()
    
        // get the value of this event, e.g., "on" or "off"
        //log.debug "The value of this event is ${evt.value}"
    	if (evt.value == "on") {
    		report_state_to_amazon("ON", evt.getDevice());
        } else {
      		report_state_to_amazon("OFF", evt.getDevice());
        }
        
        // get the Date this event happened at
        //log.debug "This event happened at ${evt.date}"
    
        // did the value of this event change from its previous state?
        //log.debug "The value of this event is different from its previous value: ${evt.isStateChange()}"
    }        
    

    Alexa Skill Lambda代码(只贴了lambda_function,其他与git中一致)

    # -*- coding: utf-8 -*-
    
    # Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
    #
    # Licensed under the Amazon Software License (the "License"). You may not use this file except in
    # compliance with the License. A copy of the License is located at
    #
    #    http://aws.amazon.com/asl/
    #
    # or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, express or implied. See the License for the specific
    # language governing permissions and limitations under the License.
    from botocore.vendored import requests
    import boto3
    import json
    from alexa.skills.smarthome import AlexaResponse
    
    dynamodb = boto3.resource('dynamodb')
    table = dynamodb.Table('table_smart_home_skill1')
    def lambda_handler(request, context):
    
        # Dump the request for logging - check the CloudWatch logs
        print('lambda_handler request  -----')
        print(json.dumps(request))
    
        if context is not None:
            print('lambda_handler context  -----')
            print(context)
    
        # Validate we have an Alexa directive
        if 'directive' not in request:
            aer = AlexaResponse(
                name='ErrorResponse',
                payload={'type': 'INVALID_DIRECTIVE',
                         'message': 'Missing key: directive, Is the request a valid Alexa Directive?'})
            return send_response(aer.get())
    
        # Check the payload version
        payload_version = request['directive']['header']['payloadVersion']
        if payload_version != '3':
            aer = AlexaResponse(
                name='ErrorResponse',
                payload={'type': 'INTERNAL_ERROR',
                         'message': 'This skill only supports Smart Home API version 3'})
            return send_response(aer.get())
    
        # Crack open the request and see what is being requested
        name = request['directive']['header']['name']
        namespace = request['directive']['header']['namespace']
    
        # Handle the incoming request from Alexa based on the namespace
    
        if namespace == 'Alexa.Authorization':
            if name == 'AcceptGrant':
                # Note: This sample accepts any grant request
                # In your implementation you would use the code and token to get and store access tokens
                grant_code = request['directive']['payload']['grant']['code']
                grantee_token = request['directive']['payload']['grantee']['token']
                ###Send the amazon grant_code
                data = {"grant_type":"authorization_code", 
                        "code":grant_code, 
                        "client_id":"amzn1.application-oa2-client.XXX", 
                        "client_secret":"XXX"}
                post_data = ""
                for key in data:
                    post_data = post_data + key + '=' + data[key] + '&'
                
                headers = {'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8'}
                r = requests.post('https://api.amazon.com/auth/o2/token', data = post_data, headers = headers)
                #print(r.status_code)
                if(r.status_code == 200):
                    print(r.json())
                    resp = r.json()
                    access_token = resp['access_token']
                    refresh_token = resp['refresh_token']
                    
                    ###TODO:Send amazon access_token to SmartThings
                    smartthings_uri = smartthings_discover_endpoint(grantee_token)
                    headers = {'Authorization': 'Bearer ' + grantee_token}
                    r = requests.get(smartthings_uri + '/amazontoken' + '/' + access_token + '/' + refresh_token, headers = headers)
                    #print("JJJ:SmartThings sent amazon token")
                    #print(r.status_code)
                    
                    table.put_item(
                       Item={
                            'ItemId': grantee_token,
                            'amazon_access_token': access_token,
                            'refresh_token': refresh_token,
                        }
                    )
                    
                else:
                    print("JJ:Get access_token Bug!")
                    return
                
                aar = AlexaResponse(namespace='Alexa.Authorization', name='AcceptGrant.Response')
                return send_response(aar.get())
                
        if namespace == 'Alexa.Discovery':
            if name == 'Discover':
                adr = AlexaResponse(namespace='Alexa.Discovery', name='Discover.Response')
                capability_alexa = adr.create_payload_endpoint_capability()
                #capability_sensor = adr.create_payload_endpoint_capability()
                capability_alexa_powercontroller = adr.create_payload_endpoint_capability(
                    interface='Alexa.PowerController',
                    supported=[{'name': 'powerState'}],
                    proactively_reported = True,
                    retrievable = True)
                capability_ContactSensor = adr.create_payload_endpoint_capability(
                    type='AlexaInterface',
                    interface = 'Alexa.ContactSensor',
                    supported=[{'name':'detectionState'}],
                    proactively_reported = True,
                    retrievable = True
                )
                
                adr.add_payload_endpoint(
                    friendly_name='J_smart_sensor_switch',
                    endpoint_id='switch1',
                    description='SmartThings Switch1',
                    display_categories=['SWITCH'],
                    manufacturer_name='SmartThings_J',
                    capabilities=[capability_alexa, capability_alexa_powercontroller, capability_ContactSensor]
                )
                adr.add_payload_endpoint(
                    friendly_name='J_smart_sensor_switch2',
                    endpoint_id='switch2',
                    description='SmartThings Switch2',
                    display_categories=['SWITCH'],
                    manufacturer_name='SmartThings_J',
                    capabilities=[capability_alexa, capability_alexa_powercontroller, capability_ContactSensor]
                )            
                
                return send_response(adr.get())
    
        if namespace == 'Alexa.PowerController':
            # Note: This sample always returns a success response for either a request to TurnOff or TurnOn
            endpoint_id = request['directive']['endpoint']['endpointId']
            ##TODO: lookup smartthings according to id and find status
            
            power_state_value = 'OFF' if name == 'TurnOff' else 'ON'
            correlation_token = request['directive']['header']['correlationToken']
            token = request['directive']['endpoint']['scope']['token']
            # Check for an error when setting the state
            smartthing_endpoint = smartthings_discover_endpoint(token)
            state_set = smartthings_control_device(smartthing_endpoint, token, endpoint_id, power_state_value)
            if not state_set:
                return AlexaResponse(
                    name='ErrorResponse',
                    payload={'type': 'ENDPOINT_UNREACHABLE', 'message': 'Unable to reach endpoint database.'}).get()
    
            apcr = AlexaResponse(correlation_token=correlation_token, token=token, endpoint_id=endpoint_id)
            apcr.add_context_property(namespace='Alexa.PowerController', name='powerState', value=power_state_value)
            if power_state_value == "ON":
                apcr.add_context_property(namespace='Alexa.ContactSensor', name='detectionState', value='DETECTED')
            else:
                apcr.add_context_property(namespace='Alexa.ContactSensor', name='detectionState', value='NOT_DETECTED')
                    
            return send_response(apcr.get())
    
    #    if namespace == 'Alexa.LockController':
            # Note: This sample always returns a success response for either a request to TurnOff or TurnOn
            endpoint_id = request['directive']['endpoint']['endpointId']
            state_value = 'LOCKED' if name == 'Lock' else 'UNLOCKED'
            correlation_token = request['directive']['header']['correlationToken']
    
            # Check for an error when setting the state
            state_set = set_device_state(endpoint_id=endpoint_id, state='lockState', value=state_value)
            if not state_set:
                return AlexaResponse(
                    name='ErrorResponse',
                    payload={'type': 'ENDPOINT_UNREACHABLE', 'message': 'Unable to reach endpoint database.'}).get()
            
            apcr = AlexaResponse(correlation_token=correlation_token)
            apcr.add_context_property(namespace='Alexa.LockController', name='lockState', value=state_value)
            
            return send_response(apcr.get())
        
        
        
        if namespace == 'Alexa':
            if name == 'ReportState':
                endpoint_id = request['directive']['endpoint']['endpointId']
                token = request['directive']['endpoint']['scope']['token']
                smartthing_endpoint = smartthings_discover_endpoint(token)
                power_state_value = smartthings_get_device_state(smartthing_endpoint, token, endpoint_id)
                if power_state_value == 'ON':
                    sensor_state_value = 'DETECTED'
                else:
                    sensor_state_value = 'NOT_DETECTED'
                ##TODO: retrive status of devices
                correlation_token = request['directive']['header']['correlationToken']
                apcr = AlexaResponse(correlation_token=correlation_token,token=token, endpoint_id=endpoint_id,name='StateReport')
                apcr.add_context_property(namespace='Alexa.ContactSensor', name='detectionState', value=sensor_state_value)
                apcr.add_context_property(namespace='Alexa.PowerController', name='powerState', value=power_state_value)
                return send_response(apcr.get())
                
    def send_response(response):
        # TODO Validate the response
        print('lambda_handler response -----')
        print(json.dumps(response))
        return response
    
    
    def set_device_state(endpoint_id, state, value):
        smartthings_discover_endpoint()
        return True
    
    def smartthings_get_device_state(smartthing_endpoint, token, endpoint_id):
        headers = {'Authorization': 'Bearer '+ token}
        #print(smartthing_endpoint + '/' + endpoint_id)
        r = requests.get(smartthing_endpoint + '/' + 'switches', headers=headers)
        #print(r.json())
        if (r.status_code == 200):
            for i in r.json():
                if i['name'] == endpoint_id:
                    if i['value'] == 'on':
                        return 'ON'
                    else:
                        return 'OFF'
        else:
            print("JJJ: get device state BUG!")
            print(r.status_code)
        
        
    def smartthings_control_device(smartthing_endpoint, token, endpoint_id, cmd):
        headers = {'Authorization': 'Bearer '+ token}
        response = requests.put(smartthing_endpoint + '/switches/' + endpoint_id + '/' + cmd, headers=headers)
        print("JJJ: Control device response: " + str(response.status_code))
        return True
        
    def smartthings_discover_endpoint(token):
        headers = {'Authorization': 'Bearer ' + token}
        r = requests.get("https://graph.api.smartthings.com/api/smartapps/endpoints", headers=headers)
        resp = r.json()
        #print(resp)
        for i in resp:
            url = i['uri']
        return url
    

    Alexa中设备、场景的数据结构

    {  
       "networkDetail":"{"   locationDetails":{  
          "locationDetails":{  
             "Default_Location":{  
                "locationId":"Default_Location",
                "amazonBridgeDetails":{  
                   "amazonBridgeDetails":{  
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                                  "aliases":[  
    
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                                  "deviceType":"CLOUD_DISCOVERED_DEVICE",
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                                  "friendlyName":"Goodbye!",
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                                     "lastSeenDiscoverySessionId":{  
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                                     }
                                  },
                                  "tags":{  
                                     "tagNameToValueSetMap":{  
    
                                     }
                                  },
                                  "additionalApplianceDetails":{  
                                     "additionalApplianceDetails":{  
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                                     }
                                  },
                                  "firmwareVersion":"0",
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                                  "capabilities":[  
                                     {  
                                        "capabilityType":"AVSSceneControllerCapability",
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                                  "applianceTypes":[  
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                                  "aliases":[  
    
                                  ],
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                                     }
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                                  "capabilities":[  
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                                        "capabilityType":"AVSSceneControllerCapability",
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                                  "capabilities":[  
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                                        "capabilityType":"AVSInterfaceCapability",
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                                        "interfaceName":"Alexa.EndpointHealth"
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                                  "aliases":[  
    
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                                     }
                                  },
                                  "additionalApplianceDetails":{  
                                     "additionalApplianceDetails":{  
                                        "uri":"https://graph.api.smartthings.com:443/api/smartapps/installations/3f4b5154-1538-429d-9311-b095a17c18a8"
                                     }
                                  },
                                  "firmwareVersion":"0",
                                  "actions":[  
    
                                  ],
                                  "capabilities":[  
                                     {  
                                        "capabilityType":"AVSSceneControllerCapability",
                                        "type":"AlexaInterface",
                                        "version":"3",
                                        "proactivelyReported":false,
                                        "supportsDeactivation":false,
                                        "interfaceName":"Alexa.SceneController"
                                     }
                                  ],
                                  "applianceTypes":[  
                                     "SCENE_TRIGGER"
                                  ],
                                  "isEnabled":true,
                                  "aliases":[  
    
                                  ],
                                  "connectedVia":"",
                                  "alexaDeviceIdentifierList":[  
    
                                  ],
                                  "ipaddress":"",
                                  "applianceLambdaControlled":true,
                                  "applianceDriverIdentity":{  
                                     "namespace":"SKILL",
                                     "identifier":"eyJza2lsbElkIjoiYW16bjEuYXNrLnNraWxsLjJiZGJjNzRmLWNlNGQtNGUyZC1iNzQxLTMyNmM3YmEzNThmMCIsInN0YWdlIjoibGl2ZSJ9"
                                  }
                               }
                            }
                         }
                      }
                   }
                },
                "applianceGroups":{  
                   "applianceGroups":{  
    
                   }
                }
             }
          }
       },
       "version":"1.0",
       "relations":[  
    
       ]
    }"
    }
    
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  • 原文地址:https://www.cnblogs.com/ascii0x03/p/10760219.html
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