If you have mischievous children or forgetful elderly in your life, you might want to build a couple of these tiny motion detection alarms to help keep them out of harm’s way. Maybe you want to keep yourself out of the cookie jar. We say good for you.
But you could always put one of these alarms on a window, a drawer, or anything else you don’t want opened or moved. The MPU6050 3-axis IMU makes sure that any way the chosen item gets jostled, that alarm is going off.
As you may have guessed, there isn’t much more to this build — the brain is a Seeed Xiao ESP32-C3, and there’s a buzzer, a battery, a switch, and a push button to program it.
The cool thing about using an ESP32-C3 is that [gokux] can use these for other things, like performing a task when motion is detected. If you do want to build yourself a couple of these, here are step-by-step instructions.
If you’d rather detect motion in the vicinity, here’s a PIR-based solution.
So, he pointed the antenna inwards?
Bad, right? But does it matter when the title says it does the trick?
This seems like it would be a lot more useful if it were running something like ESPHOME.
Or, you could talk to your kids and teach them.
Yes, it works even before they can walk. Try.
Looks like a nice project. I try to get the most battery life out of my ESP projects by doing things like turning the wifi off, using deep sleep, and even lowering the clock rate to 20mhz or less if you don’t need much processing power.
What’s the battery life? 3 hours? Most of these designs are so bad for anything other than the battery factory owners!