Is there anything that allows you to receive text messages when you open the door at home?

There are also those embedded gadgets, but it seems that you still need a useless mobile phone and mobile phone card ~

Look for it on Taobao, this gadget is quite common!

I don't know what it's called, embedded security door alarm. It is estimated that you can find it by searching the security door alarm, plus some keywords, anti-theft, SMS prompt, SMS alarm, anti-theft alarm and so on.

Go to Taobao, JD.COM Mall or something.