The $35 Raspberry Pi upgrade every 3D printer owner actually needs


Many of the fancier 3D printers now run their own internal web server that you can log into from any browser on your LAN. This usually lets you control the printer, use its internal camera, if any, and pretty much manage your printer without having to stand around in vaporized plastic fumes.

But, what if you don’t have a printer that comes with this feature built in? That’s when you want to use OctoPrint. It’s an open-source, browser-based interface to monitor and control your 3D printer. However, OctoPrint needs something to run on, but the good news is that, thanks to the OctoPi image, OctorPrint can run on a Raspberry Pi. Making this a $35 (or less) upgrade for a huge number of printers out there.

What a Raspberry Pi and OctoPrint setup actually does

It’s the brains of the operation

A Raspberry Pi 5 fitted with an active cooler in the bottom half of a case. Credit: Sydney Louw Butler / How-To Geek

At its core, pairing a Raspberry Pi with OctoPrint turns your “dumb” 3D printer into a remotely accessible, fully monitored system.

OctoPrint is a web server that communicates with your printer via USB. It gives you a web interface that comes standard with printers like my Elegoo Centauri Carbon and Creality K1 Max.

Using OctoPrint, you can log in and use any browser to:

  • Start, pause, and stop prints remotely
  • Upload and manage G-code files without touching an SD card
  • Monitor print progress in real time
  • Adjust temperatures, speeds, and settings on the fly
  • Get alerts if something goes wrong

Add a cheap USB camera, and you now have a live video feed of your print from anywhere.

The Creality K1 Max

9/10

Brand

Creality

Build Volume

11.8×11.8×11.8in


What you need to get started (and why it’s cheap)

The list is short

The beauty of OctoPrint is that it doesn’t take much of an investment to get up and running. The software itself is free, but of course, donations help it stay afloat.

At the very least, you should aim for a Raspberry Pi 3B or 3B+, which means you don’t actually need to spend the $35 for the latest model. You can buy older Pis for less, or maybe even pick one up for free. If you already have a Raspberry P you’re not using, that’s even better.

To be clear, you don’t need to use a Pi at all, it’s just one of the most popular solutions for OctoPrint. Any computer will do, so if you have an old laptop, a mini PC, or an old desktop you no longer use, then it might be the perfect printer controller.

In addition to the Pi, you’ll need a 16GB SD card or larger, a USB cable to connect to the printer, and a power supply for the Pi. Optionally, you can also attach a USB webcam. Some printers have USB ports that allow you to plug a camera into the printer itself.

You also need a printer that’s compatible with OctoPrint, but luckily there’s a printer compatibility list you can consult.

raspberry pi 5-1

Brand

Raspberry Pi

Storage

8GB


You can use one Pi with multiple printers (with some terminal magic)

It’s crude, but it works

Despite being called “OctoPrint,” a single instance can only monitor and manage one printer at a time. So does that mean you need to buy a Raspberry Pi for every one of your printers? No! It turns out the community has this figured out.

The trick is to run multiple instances of OctoPrint on a single Raspberry Pi (or whatever other computer you use) and the below guide by Chris Ryley covers the whole thing step-by-step.

Yes, you’re going to spend a little time in the Linux Terminal, but in the end, every one of your printers will be controllable from a web browser. If you add another printer, you just need to add another instance. The above method uses the popular OctoPrint Deploy script, but there are other methods, such as using Docker.


OctoPrint goes a long way to taking the frustration of wasted printing time or filament out of 3D printing. Best of all, you can access OctoPrint from outside your LAN using a remote access plugin. So now you can manage that print farm no matter where you are.

Centauri Carbon printer on a white background.

9/10

Build Volume

10.4in x 10.4in x 10.4in

Printing Speed

500mm/s




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Recent Reviews


Google Maps has a long list of hidden (and sometimes, just underrated) features that help you navigate seamlessly. But I was not a big fan of using Google Maps for walking: that is, until I started using the right set of features that helped me navigate better.

Add layers to your map

See more information on the screen

Layers are an incredibly useful yet underrated feature that can be utilized for all modes of transport. These help add more details to your map beyond the default view, so you can plan your journey better.

To use layers, open your Google Maps app (Android, iPhone). Tap the layer icon on the upper right side (under your profile picture and nearby attractions options). You can switch your map type from default to satellite or terrain, and overlay your map with details, such as traffic, transit, biking, street view (perfect for walking), and 3D (Android)/raised buildings (iPhone) (for buildings). To turn off map details, go back to Layers and tap again on the details you want to disable.

In particular, adding a street view and 3D/raised buildings layer can help you gauge the terrain and get more information about the landscape, so you can avoid tricky paths and discover shortcuts.

Set up Live View

Just hold up your phone

A feature that can help you set out on walks with good navigation is Google Maps’ Live View. This lets you use augmented reality (AR) technology to see real-time navigation: beyond the directions you see on your map, you are able to see directions in your live view through your camera, overlaying instructions with your real view. This feature is very useful for travel and new areas, since it gives you navigational insights for walking that go beyond a 2D map.

To use Live View, search for a location on Google Maps, then tap “Directions.” Once the route appears, tap “Walk,” then tap “Live View” in the navigation options. You will be prompted to point your camera at things like buildings, stores, and signs around you, so Google Maps can analyze your surroundings and give you accurate directions.

Download maps offline

Google Maps without an internet connection

Whether you’re on a hiking trip in a low-connectivity area or want offline maps for your favorite walking destinations, having specific map routes downloaded can be a great help. Google Maps lets you download maps to your device while you’re connected to Wi-Fi or mobile data, and use them when your device is offline.

For Android, open Google Maps and search for a specific place or location. In the placesheet, swipe right, then tap More > Download offline map > Download. For iPhone, search for a location on Google Maps, then, at the bottom of your screen, tap the name or address of the place. Tap More > Download offline map > Download.

After you download an area, use Google Maps as you normally would. If you go offline, your offline maps will guide you to your destination as long as the entire route is within the offline map.

Enable Detailed Voice Guidance

Get better instructions

Voice guidance is a basic yet powerful navigation tool that can come in handy during walks in unfamiliar locations and can be used to ensure your journey is on the right path. To ensure guidance audio is enabled, go to your Google Maps profile (upper right corner), then tap Settings > Navigation > Sound and Voice. Here, tap “Unmute” on “Guidance Audio.”

Apart from this, you can also use Google Assistant to help you along your journey, asking questions about your destination, nearby sights, detours, additional stops, etc. To use this feature on iPhone, map a walking route to a destination, then tap the mic icon in the upper-right corner. For Android, you can also say “Hey Google” after mapping your destination to activate the assistant.

Voice guidance is handy for both new and old places, like when you’re running errands and need to navigate hands-free.

Add multiple stops

Keep your trip going

If you walk regularly to run errands, Google Maps has a simple yet effective feature that can help you plan your route in a better way. With Maps’ multiple stop feature, you can add several stops between your current and final destination to minimize any wasted time and unnecessary detours.

To add multiple stops on Google Maps, search for a destination, then tap “Directions.” Select the walking option, then click the three dots on top (next to “Your Location”), and tap “Edit Stops.” You can now add a stop by searching for it and tapping “Add Stop,” and swap the stops at your convenience. Repeat this process by tapping “Add Stops” until your route is complete, then tap “Start” to begin your journey.

You can add up to ten stops in a single route on both mobile and desktop, and use the journey for multiple modes (walking, driving, and cycling) except public transport and flights. I find this Google Maps feature to be an essential tool for travel to walkable cities, especially when I’m planning a route I am unfamiliar with.


More to discover

A new feature to keep an eye out for, especially if you use Google Maps for walking and cycling, is Google’s Gemini boost, which will allow you to navigate hands-free and get real-time information about your journey. This feature has been rolling out for both Android and iOS users.



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