First batch · 12 units

MOTIONSENSR

Your PC wakes up when you walk in.
It goes to sleep when you leave.

A tiny USB device that handles both sides automatically — no drivers, no software, no cloud.

"There's dozens of us. Dozens!"

This is a very specific product for a very specific type of person. If you have a DAKboard, MagicMirror, Home Assistant dashboard, or any PC that should wake when someone enters the room and sleep when they leave, then this guy's for you!

Order Now — $29.99

Free shipping · First batch of 12 · Ships in 1–3 business days

MOTIONSENSR USB motion sensor — assembled unit next to a penny for scale

How It Works

1. Plug it in

Plug MOTIONSENSR into any USB-A or USB-C port. No drivers needed. Windows, Mac, and Linux all recognize it instantly as a USB keyboard.

2. Set it and forget it

A drive called MOTIONSENSR appears on your computer. Open CONFIG.TXT and set your preferences — then save. Done. Settings survive unplugging.

3. It handles the rest

Walk into the room → your PC wakes up. Walk away → your PC sleeps. Fully automatic. Zero ongoing attention needed.

Features

Truly Plug-and-Play

No drivers, no software installation. Works on Windows, macOS, and Linux right out of the box.

File-Based Configuration

A plain-text CONFIG.TXT file on the mounted drive controls everything. Edit it in Notepad. Save. Done.

Wake AND Sleep

Detects motion to wake your PC. Detects no-motion to sleep it. The device handles both sides of the equation.

Configurable Timers

Set your cooldown between wake events and your no-motion sleep delay. Defaults are sensible; tuning is easy.

Settings Survive Power Loss

Configuration is written to flash in a wear-safe A/B scheme. Your settings are there every time you plug in.

Works With Any Software

Since the device appears as a USB keyboard, it works with Home Assistant, AutoHotkey, DAKboard, MagicMirror, and anything else that responds to keypresses.

Includes USB-C Cable

A 6-foot USB-C data+power cable is included. (Charge-only cables won't work — we include the right one.)

Made by a Human

Not a faceless factory. Built and shipped by one guy who made this to solve his own problem.

What People Use It For

DAKboard / MagicMirror Kiosk

Wake your photo display when someone enters the room. Sleep it when they leave. Works with or without AutoHotkey.

Home Assistant Dashboard

Keep your wall tablet or dashboard PC on when you're nearby. Let it sleep itself when the room is empty.

Homelab / IT

Keep servers or lab PCs awake during maintenance. Auto-sleep remote displays when not in use.

Energy Savings

Stop your PC from running all day when no one's there. MOTIONSENSR puts it to sleep so you don't have to think about it.

Configuration is just a text file

Open CONFIG.TXT on the MOTIONSENSR drive and edit. Save the file. Settings apply immediately and survive reboots.

; Wake PC on motion, sleep after 10 minutes of no motion
mod =
key = PAUSE
cooldown_ms = 10000
nomotion_enabled = 1
nomotion_after_ms = 600000
nomotion_key = SYSTEM_SLEEP

That's it. No apps. No accounts. No cloud.

Why I built this

I have a family room PC that shows a DAKboard photo calendar when no one's using it. I wanted it to wake up when someone walked in, and sleep when everyone left — automatically, without touching anything.

I couldn't find a product that did this without requiring software, cloud accounts, or janky workarounds. So I built one.

I bought a 3D printer to make the enclosures. The design went through 32 revisions — most of that iteration happened with Claude AI, working through geometry in OpenSCAD: describe a constraint, Claude suggests a fix, re-render, repeat. I physically printed only the last 4 versions once the design started looking like something real.

After a few months running on my own PC, I figured other people might want it too. The price exists to recoup the cost of the printer. I'm selling 12 units. If they sell, great. If this is the only batch ever made, that's fine too.

So here it is.

How it got made

A $2 PIR sensor, a $10 microcontroller, a newly purchased 3D printer, and 32 enclosure revisions.

MOTIONSENSR components laid out on a workbench — RP2040-Zero board, AM312 PIR sensor, and enclosure iterations with a penny for scale
The guts: RP2040-Zero, AM312 PIR sensor, and a few enclosure iterations on the bench. Penny for scale.
Flashforge Adventurer 5M 3D printer with two MOTIONSENSR enclosure bases on the print bed
The Adventurer 5M that started this whole thing. Printing two enclosure bases at once.
Exploded CAD view of the MOTIONSENSR enclosure showing lid, PCB tray, and base with snap-fit design
Exploded view from one of the later revisions. The snap-fit lid took the most iteration to get right.
Screenshot of Claude AI conversation working through enclosure geometry constraints
Most of the design iteration happened in conversation with Claude AI. Describe a constraint → Claude suggests geometry → tweak and re-render. 32 revisions. 4 prints.

FAQ

Any computer with a USB port and standard HID keyboard support. Windows, macOS, and Linux all work. No drivers or software needed.

When the PIR sensor detects motion, the device sends a configurable keypress (default: Pause) over USB HID. This wakes most PCs from sleep or standby. You can change the key in CONFIG.TXT.

After a configurable period of no motion, the device sends a USB HID System Sleep command directly to the OS. No software required.

No. It's a USB device. It never touches the internet.

Yes. Edit CONFIG.TXT on the mounted drive. The cooldown between wake events, the no-motion sleep delay, and the keypress are all configurable.

The MOTIONSENSR device and a 6-foot USB-C data+power cable.

Email me. I'll help you get it working or refund you.

First batch · 12 units

Ready to set it and forget it?

$29.99 — Free shipping

Order Now

Questions? Email [email protected]

Ships from the US. Usually out the door within 1–3 business days.

This is a first batch of 12 units made by one person. If it works for you, great. If it doesn't, email me and I'll make it right.