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---
title: The Ultimate OctoPi Setup | daily.dev
description: A detailed walkthrough for setting up OctoPrint on a Raspberry Pi 3 (OctoPi) for a 3D printer enclosure, including building a custom circuit with a 74AHCT125...
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og:title: The Ultimate OctoPi Setup | daily.dev
og:description: A detailed walkthrough for setting up OctoPrint on a Raspberry Pi 3 (OctoPi) for a 3D printer enclosure, including building a custom circuit with a 74AHCT125...
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# The Ultimate OctoPi Setup

**[apalrd's adventures](https://daily.dev/sources/apalrd)** · 11 min read · 0 upvotes · 0 comments

## Summary

A detailed walkthrough for setting up OctoPrint on a Raspberry Pi 3 (OctoPi) for a 3D printer enclosure, including building a custom circuit with a 74AHCT125 level shifter to drive WS2812 RGB LED strips that display print progress, mounting the LEDs as a bar graph, configuring NAS storage via autofs to reduce SD card wear, and integrating with Home Assistant via MQTT and the HomeAssistant Discovery plugin. The guide covers plugin installation (MQTT, HomeAssistant Discovery, WS281x LED Status), folder configuration via config.yaml, and setting up a Lovelace dashboard for monitoring.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.apalrd.net/projects/2021/3d_printer_octopi>

## Questions this post answers

### How do I mount NAS storage for OctoPrint on a Raspberry Pi to avoid SD card wear?

Install autofs on the Pi, mount your NAS share at /mnt/printer with the noperm option to disable client-side permissions, then edit ~/.octoprint/config.yaml to redirect the logs, timelapse, uploads, and watched folders to subfolders of that mount. Stop OctoPrint before editing the yaml and restart after. Avoid mounting the timelapse temp folder remotely, as it can cause OctoPrint to reset all folder settings.

_Makers running OctoPrint on SD cards track storage tips like this on daily.dev._

### How do I integrate OctoPrint with Home Assistant using MQTT?

Install the MQTT plugin and HomeAssistant Discovery plugin in OctoPrint. Configure the MQTT plugin with your broker address and a unique path per printer (e.g., octoprint/printername/). Enable HomeAssistant Discovery and restart OctoPrint — entities will appear in Home Assistant automatically. Use MQTT Explorer to verify data is publishing to the correct path before enabling the Discovery plugin.

_Developers building home automation around 3D printers find integration guides like this on daily.dev._

### Why do I need a 74AHCT125 level shifter between a Raspberry Pi and WS2812 LED strips?

The Raspberry Pi's GPIO outputs 3.3V logic, but WS2812 LEDs require a 5V data signal. The 74AHCT125 quad buffer shifts the signal voltage to 5V and also protects the Pi's GPIO pin. The OE (output enable) pins should be tied to ground explicitly, as leaving them floating can cause erratic behavior when signal wires run nearby.

_Hardware hackers working with Raspberry Pi GPIO and LED strips share wiring details like this on daily.dev._

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---

Tags: [#backend](https://daily.dev/tags/backend), [#raspberry-pi](https://daily.dev/tags/raspberry-pi)

[View this post on daily.dev](https://daily.dev/posts/the-ultimate-octopi-setup-cigq8ejed)

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