There’s a huge market for 433 MHz alarm system hardware out there ... From there, the code on the ESP can fire off using whatever API works for your purposes. In this case [Aaron] is using ...

SEE FULL REVIEW » Plans and Equipment: Ring Alarm offers security system packages that start at $199.99 for one motion sensor ... includes Amazon Echo smart-speaker models, Schlage and Yale ...

The best ones don’t just warn you of possible fire or the presence of carbon ... and it’s a much less expensive way to improve your smoke alarm system. In our testing, the Kidde alarm reliably ...