Ravenwood Creations

Setting Up a Raspberry Pi 5 to Use an Offline LLM in Survival Situations

Setting Up a Raspberry Pi 5 to Use an Offline LLM in Survival Situations

Imagine having your own personal AI assistant—powered by a Large Language Model (LLM)—running locally on a Raspberry Pi, free from big tech’s servers and data-sharing policies. What once sounded like science fiction is now within reach, thanks to affordable hardware and open-source tools. Since OpenAI unleashed ChatGPT in late 2022, LLMs have dazzled us with their ability to write, reason, and chat. Now, with just a Raspberry Pi, you can harness that power for yourself. This guide walks you through the process, step by step, and my Sidekick project (check it out here) makes it even easier.

What You’ll Need

To get started, gather these essential components:

  • Raspberry Pi: The 8 GB Raspberry Pi 5 is your best bet for solid performance. Older models (like the 3B) work but crawl—trust me, I’ve tried.
  • microSD Card: A high-speed card (Class 10 or better, 32 GB minimum) ensures smooth operation. Preload it with Raspberry Pi OS (Lite for efficiency, or full version if you multitask).
  • Power Supply: Stick with the official Raspberry Pi power supply to avoid hiccups.
  • Keyboard, Mouse, and Monitor: Handy for initial setup, though you can skip these if you’re comfy with SSH.
  • Internet Connection: Needed to download software and models.

With these in hand, you’re ready to roll.

Setting Up Raspberry Pi OS

Before diving into AI, let’s prep your Raspberry Pi with its operating system. Here’s how:

  1. Download Raspberry Pi OS: Grab the latest version via the Raspberry Pi Imager. The Lite version saves resources, but the full version works if you need a desktop.
  2. Flash the microSD Card: Open the Imager, select your OS image, pick your microSD card, and hit “Flash.” Easy peasy.
  3. Initial Setup: Pop the microSD card into your Pi, connect peripherals (if using), and power it up. Follow the prompts to set language, time zone, and Wi-Fi.
  4. Update the System: Open a terminal and run: bashCollapseWrapCopysudo apt update && sudo apt upgrade -y This keeps your Pi current and stable.

Need visuals? The official Raspberry Pi docs have you covered.

Install Ollama

To run an LLM locally, you’ll need software to manage it. Two popular options are llama.cpp (a lightweight C++ framework) and Ollama (a user-friendly wrapper). I recommend Ollama for its simplicity—it handles model downloads, templating, and more, making it perfect for beginners and pros alike.

Installing Ollama

Ensure your Pi is online, then open a terminal and run:

bashCollapseWrapCopycurl https://ollama.ai/install.sh | sh

This script fetches and sets up Ollama automatically. My Sidekick repo streamlines this further—check it out for a one-click vibe.

Download and Run an LLM

Now, let’s add the brains: the LLM itself. With 8 GB of RAM, you can handle models up to 7 billion parameters.

Choosing a Model

Options abound—Mistral (7B), Gemma (2B or 7B), Llama 2 Uncensored (7B)—but I love Microsoft’s Phi-3 (3.8B) for its balance of power and efficiency on a Pi. Browse all choices at the Ollama library.

To install Phi-3, run:

ollama run phi3

This downloads and launches the model. Once it’s ready, you’ll see a prompt waiting for your input.

Using Your Local LLM

You’re live! Type a message and hit Enter to chat with Phi-3. Here’s how to make the most of it:

Effective Prompt Crafting

  • Be Specific: “Write a 100-word story about a dragon who loves ice cream.”
  • Set the Context: “You’re a historian in 3000 AD. Recap the 21st century.”
  • Define Roles: “Act as a travel guide and list three must-see Paris spots.”

To exit, hit Ctrl + D or type /bye. Restart anytime with ollama run phi3—no redownload needed.

Performance Considerations

The Raspberry Pi 5 churns out a few tokens per second, so expect responses in a few seconds per query. Want speed? A beefier machine with a GPU outpaces the Pi, but for privacy and portability, this setup shines.

Maximizing Your LLM Experience

Customizing Settings

Tweak these in Ollama for better results (adjust via API or config—see Sidekick for details):

  • Token Limit: Caps response length (e.g., 200 tokens for short answers).
  • Temperature: Higher (1.0) for creative chaos, lower (0.5) for precision.
  • Top-k Sampling: Limits token choices (e.g., 40) for tighter focus.

Running Multiple Models

Download another model (e.g., ollama run mistral) and switch anytime with ollama run [model_name]. Each loads on demand.

Troubleshooting Common Issues

Installation Hiccups

If Ollama won’t install, update your system first:

bashCollapseWrapCopysudo apt update && sudo apt upgrade -y

Performance Slowdowns

  • Cooling: Add a fan or heatsink—overheating kills speed.
  • Power: A weak supply throttles your Pi. Use the official one.
  • Resources: Close extra apps to free RAM.

Port Conflicts

See an error about ports? Restart the service:

sudo systemctl stop ollama 

sudo systemctl start ollama

Model Loading Fails

Check memory (free -h) and storage (df -h). Clear space if needed.

Advanced Usage Scenarios

Take it further:

  • Integration: Hook Ollama’s API into a web app or smart home setup (Sidekick has examples).
  • Custom Models: Fine-tune Phi-3 on your data for niche tasks—think personal Q&A.
  • Network Access: Configure Ollama to serve multiple devices on your LAN.

Optimizing for Survival Situations

Off-grid? Here’s how to ruggedize your setup:

  • Power: Pair with a battery pack or solar charger.
  • Backup: Clone your microSD card monthly; keep a spare preloaded.
  • Weatherproofing: Use a waterproof case and stash in a tough container.

Conclusion

Building your own AI assistant on a Raspberry Pi is a game-changer—private, powerful, and yours to control. Whether it’s for projects, learning, or just geeky fun, this setup (boosted by Sidekick) unlocks endless possibilities. Dive in and make it your own!

FAQs

  1. Can I use an older Raspberry Pi?
    Yes, but performance tanks—my Pi 3B was painfully slow. Stick with the 5.
  2. How do I update Ollama or models?
    Rerun the install script for Ollama. For models, check the Ollama library for new versions.
  3. Can I run multiple LLMs at once?
    Technically, yes, but the Pi’s limited RAM means you’ll feel the lag.
  4. Is real-time use possible?
    It’s doable but sluggish. For snappy responses, upgrade your hardware.
  5. Can I use it offline?
    Absolutely—once the model’s downloaded, no internet required.
  6. How do I uninstall Ollama?
    Run sudo ollama uninstall to wipe it clean.
  7. Other model options?
    Tons! Explore the Ollama library for gems like Mistral or Gemma.
  8. How can I contribute?
    Share feedback or code at Ollama’s repo—or tweak Sidekick and PR me!