A simple project to observe a window or door is open/closed. It works like most other sensors as well. A magnet has to get attached to the door and if it comes near the board, it is detected and the ...

Door/Window sensor based on a design by MakerMeik but using different code to use the ESP-NOW protocol. Using ESP-NOW means that the connection and sending of the data packet takes around 500mS to ...

This article describes how I have set up a simple “door-sentry” at home. The door-open detector is designed to alert you to an unauthorized entry in a confined area. It uses a little ATtiny85 ...

I don’t use my garage very often, but I am a pretty forgetful person. So it’s not uncommon for me to leave my garage door open all night, revealing its precious contents to passers-by. Thankfully I ...

You don't have to spend a fortune on security -- DIY smart home security is affordable and effective with Aqara devices and other integrations. Aqara Door and Window ...

Smart home technology is continuously evolving, with energy efficiency driving innovation. A standout project in the developer community is the Battery-Less Smart Door Sensor, a highly efficient ...

[CarrotIndustries] wanted to add an audible warning for when the refrigerator door was left open. The result is a fridge buzzer that attaches to the inside of a fridge door and starts buzzing if the ...