在sub端 googleHomeService要進行一些更動

• 加入pub/sub的subsciption

• 加入金鑰的json檔案

• 設定subscriberOptions

• pubsub.subscription to google tts push message

• 設定ack

    const googleHome = require('google-home-push');
    const { PubSub } = require('@google-cloud/pubsub');
    const config = require('./config')
  
    const language = "zh-TW"
    const accent = "zh-TW"
    const options = {
      language: language,
      accent: accent
    }
  
    const subscriptionName = 'projects/utliot-3a89b/subscriptions/utl-smart-speakers'
  
  
    const pubsub = new PubSub({
      projectId: 'your-projectId',
      keyFilename: '/home/pi/Desktop/googleHomeService/金曜.json'
    });
  
  
    const subscriberOptions = {
      flowControl: {
        maxMessages: 1
      }
    }
    const subscription = pubsub.subscription(subscriptionName,subscriberOptions);
    const messageHandler = message => {
  
      console.log(message.data)
      console.log(Buffer.from(message.data, 'base64').toString())
      const notifyMessage =  Buffer.from(message.data, 'base64').toString()
  
        const googleHomeIp = config.moudule.ip
        const myHome = new googleHome(googleHomeIp, options)
        myHome.speak(`${notifyMessage}`).then((status)=>{
        console.log(status)
        })
      }
  
      message.ack();
    }
    // Listen for new messages until timeout is hit
    subscription.on('message',messageHandler )
    subscription.on('error', function (error) {
      // Do something with the error
      console.error(`ERROR: ${error}`);
      throw error;
    });
  

記得先到GCP該專案的IAM與管理，建立服務帳戶

• step1
  
• step 2 選擇Pub/sub 發布/訂閱管理員
  
• step 3
  
• step 4 進該項目點擊新增金鑰，並下載JSON