You can build an IoT sensor for your 3D printer so you can be alerted if you’re out of filament. We think this is a great proof-of-concept that can help prevent failed prints. 

This project uses an IR Optical Sensor that can detect whenever an object passes by the sensor. The breakout is mounted to a 3D printed bracket right above the 3D printer. 

If nothing is detected, an LED buzzer alarm will be triggered letting you know your printer is out of filament.

An Adafruit QT Py ESP32-S2 reads the IR optical sensor and sends data to Adafruit IO whenever it detects missing filament.

The LED buzzer alarm is wired up to a Feather ESP32-S2 so it’s a separate device that can be in another room or workspace that’s away from the 3D printer.

This is great for CNC workshops and 3D printer farms that are in separate rooms away from operators.

This project uses Adafruit’s WipperSnapper, so there’s no code necessary -- making this really easy to set up and get going.

Just install the WipperSnapper firmware onto the Adafruit ESP32 dev board and add the Optical sensor from the Adafruit IO device page.

Parts

Close-up video of white finger triggering an optical reflective sensor breakout.
An optical reflective sensor is a composite electronic device with two elements - an IR LED and an IR photo-transistor. The IR LED blasts light, and when something bounces...
Angled shot of small square purple dev board.
What has your favorite Espressif WiFi microcontroller, comes with our favorite connector - the STEMMA QT, a chainable I2C port, and has...
Video of warning light glowing swirling LEDs.
THE REACTOR'S MELTING DOWN! GRAB THE FUEL CORE, JENNA, AND EVACUATE THE COMMAND CENTER! With this Rotating LED Warning Light with Adjustable Volume Buzzer Alarm,...
Angled shot of rectangular microcontroller.
What's Feather-shaped and has an ESP32-S2 WiFi module? What has a STEMMA QT connector for I2C devices? What has your favorite Espressif WiFi microcontroller and lots of Flash and...
Prototyping feather wing PCB with loose headers
A Feather board without ambition is a Feather board without FeatherWings!This is the FeatherWing Proto - a prototyping add-on for all Feather boards. Using our...
3 pack TIP120 Power Darlington Transistors
Transistors are powerful little electronic switches, and when our little NPN transistors aren't power enough for your project, we have been known to use these beefy TIP120...
Angled shot of black 2-pin 2.54mm terminal block.
After a long day out harvesting in the terminal block fields, we've returned with a veritable bounty of these very nice and compact 2.54mm/0.1" terminal blocks in a variety of...
Angled shot of 25 Through-Hole Resistors - 2.2K ohm 5% 1/4W.
ΩMG! You're not going to be able to resist these handy resistor packs! Well, axially, they do all of the resisting for you!This is a 25 Pack of 2.2K...
Angled shot of a Header Kit for Feather - 12-pin and 16-pin Female Header Set.
These two Female Headers alone are, well, lonely. But pair them with any of our 
Angled shot of STEMMA JST PH 3-Pin to Male Header Cable - 200mm.
This cable will let you turn a JST PH 3-pin cable port into 3 individual wires with high-quality 0.1" male header plugs on the end. We're carrying these to match up with our...
USB C to USB C cable. USB 3.1 gen 4 with E-Mark. 1 meter long
As technology changes and adapts, so does Adafruit! Rather than the regular USB A, this cable has USB C to USB C plugs!USB C is the latest...
2 x M2x8mm Screws
Filament Guide bar
3 x M2.5x5mm
TCRT (2) + FeatherWing Proto (1)
3 x M2x5mm
FeatherWing Proto (2) + Holder Mount (1)
2 x M2x12mm
2020 Bar screws

This guide was first published on Jul 02, 2024. It was last updated on Jul 03, 2024.

This page (Overview) was last updated on Jul 03, 2024.

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