Third-party control issues

Why am I prompted to enter a PIN when using voice commands to open the door via Alexa/Google?

How to control devices and run Tap-to-Run via the Watch version of the App?

How to display Devices and Tap-to-Run items in the Watch version of the App?

What can I do if my App account cannot connect /link with Google Home/Google Action/Alexa?

After connecting to Google Home, the device does not appear/sync in the Google Home App?

Do smart speakers support other languages? Can two languages be mixed?

Why does my App account bind with Alexa skill successfully but failed to Google?

Can Echo be used normally in Mainland China?

When searching for skills in a third-party App , the account prompts that the account does not exist?

How to connect App/smart devices to Tencent Xiaowei?