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Wifi controlled stepper motor

Control a stepper motor over Wifi

jasonwinfieldnzjasonwinfieldnz
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This project uses the common 28BYJ-48 stepper motor and 8266 wifi module to lock and unlock a cat door.

The project uses a web page hosted on the 8266 to provide a WEB UI to lock and unlock a cat door. You can also activate the door with a button on the module itself. The design utilizes a 3D-printed chassis and rack and pinion to lock the door. Check out the videos below for full details 

  • 1
    Print STL files

    Print the STL files found here: https://cults3d.com/en/3d-model/gadget/remote-cat-door-lock  No supports should be required, I would suggest 100% infill around mounting holes if your slicer allows this but it is not imperative.

  • 2
    Screw in the motor and driver.

    Screw the stepper motor and driver board into the chassis. The wiring loom on the motor is quite long so I wrapped it around the motor a couple of times to keep things tidy. Plug this into the driver board.

  • 3
    Install the 8266 controller.

    Screw in the controller on the other side of the chassis.

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mickeythedrone wrote 03/29/2024 at 03:30 • point

Hi Jason! I know you made this almost 2 years ago now, but I wanted to know, do you happen to know how much weight that motor can lift?

I've got a cat door that's flexible, so this wouldn't work entirely, but I'm thinking I could use the same process to lift and close the cover for that door instead.

I figure there's some ways to finagle it to attach, but just need a motor that can lift the door up or down.

  Are you sure? yes | no

Tim Savage wrote 11/05/2023 at 13:25 • point

Nice, I already have the same stepper and driver board. My partner is getting sick of the cat waking her up at 4:30am and wants a solution.  Was thinking of something along the same lines, doesn't need to be more complex than this.

I'll probably just use ESPHome for the firmware.

  Are you sure? yes | no

Dan Maloney wrote 11/02/2022 at 18:30 • point

Hi Jason --

This is great -- so many of these critter-proofing projects try to over-solve the problem, with machine learning and such. I love that all you did here was solve the essential problem. Great stuff!

Wrote this up for the blog, should publish soon. Thanks for the tip!

  Are you sure? yes | no

jasonwinfieldnz wrote 11/02/2022 at 22:19 • point

Thanks for the feedback Dan. I try to keep it simple so anyone can have a go. 

  Are you sure? yes | no

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