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Pi Options

Choosing a Pi Model

For most people starting a new Allsky build today, the Raspberry Pi 5 with 8 GB of memory is the best choice if the budget allows it. It gives you the most headroom, it handles current Allsky features comfortably, and it is the least likely to feel restrictive later as Allsky continues to grow.

That does not mean Allsky needs a great deal of power just to take pictures. Image capture itself is not especially demanding. Where the faster Pi makes a noticeable difference is in everything around capture:

  • installation and upgrades
  • generating keograms
  • generating startrails
  • creating timelapse videos
  • creating mini-timelapses more often
  • handling other tasks on the Pi while Allsky is running

In other words, the Pi choice is less about whether the camera can take a picture at all, and more about how comfortable the whole system feels to live with.

Quick summary

If you want the short version first, use the table below.

Pi model Supported Recommended Notes
Pi 5, 8 GB Yes Best choice Fastest and most future-proof option, but produces more heat
Pi 4, 4 GB Yes Yes Strong balance of price, memory, and performance
Pi 4, 2 GB Yes Acceptable Good budget-conscious option
Pi 4, 1 GB Yes No Works, but memory limits are much more noticeable
Pi 3B+ Yes Only if you already have one Usable, but slower for timelapses and other processing
Pi Zero 2 Limited No Only consider if cost matters more than performance and headroom
Pi Zero No No Not recommended for Allsky
Pi clones Generally no No Compatibility is limited and unreliable

Best overall choice

If you want the simplest recommendation, it is this:

  • Best choice: Pi 5 with 8 GB RAM
  • Next best: Pi 4 with 4 GB RAM
  • Acceptable lower-cost option: Pi 4 with 2 GB RAM

These are the models most users should concentrate on unless there is a specific reason to use something else.

Pi 5

The Pi 5 is the strongest Allsky platform in the Raspberry Pi family at the time of writing, and the 8 GB model is the one most likely to stay comfortable for future versions.

The Pi 5 makes the biggest difference when:

  • your camera has a high resolution
  • you generate timelapses regularly
  • you use extra processing or modules
  • you want the WebUI, upgrades, and maintenance tasks to feel faster
  • you plan to use the Pi for other jobs as well

If you are building a new system and want to avoid second-guessing the hardware later, the Pi 5 is the least risky choice.

The trade-off is heat. A Pi 5 runs hotter than older models, especially when it is busy creating videos or other derived products. In an allsky enclosure that matters. If the case has poor airflow, the extra performance can become extra heat you then need to manage.

Pi Speed

In general, faster Pi models produce more heat. If your allsky enclosure has poor ventilation, limited airflow, or sits in a hot location, this matters just as much as raw speed.

For many users, a Pi 5 is best paired with:

  • a decent quality power supply
  • some form of cooling, even if modest
  • attention to case ventilation if the Pi is mounted inside the camera housing

Pi 4

The Pi 4 remains a very sensible Allsky platform, especially if you already own one.

The 4 GB model is the sweet spot in the Pi 4 range. It has enough memory to be comfortable for normal Allsky use and enough CPU performance for derived products without feeling overly constrained.

The 2 GB Pi 4 can also work well and is still a reasonable budget-conscious choice. It may be slower during more demanding tasks, but for many users it is perfectly usable.

The 1 GB Pi 4 is where compromises start to become more obvious. It can work, but you are much more likely to run into memory pressure. That usually means:

  • increasing swap space
  • slower timelapse or derived-product generation
  • more wear on your SD card if swap is used heavily

If you already have a 1 GB Pi 4, it may still be worth trying. If you are buying new hardware, it is usually better to avoid the 1 GB model.

Pi 3B+

The Pi 3B+ can still run Allsky, but it is now more of a minimum practical platform than a recommended new purchase.

If you already own one, it can be a good way to get started. It will capture images just fine, and many people have run Allsky successfully on this class of hardware. The limitations show up when you ask it to do more than basic capture:

  • timelapse generation takes longer
  • mini-timelapse frequency may need to be reduced
  • upgrades and package installs feel noticeably slower
  • future Allsky features may place more pressure on it

The Pi 3B+ is best thought of as a workable existing-hardware option rather than the model most people should go out and buy today.

Pi Zero and Pi Zero 2

The Pi Zero is not recommended for Allsky. Its CPU and memory are simply too limited for a comfortable experience, and you are likely to run into problems with derived products such as timelapses.

The Pi Zero 2 is better than the original Pi Zero, but it is still a very limited platform. It should only be considered if cost is the overriding concern and you are willing to accept a narrower margin for future Allsky versions.

You may be able to make a Pi Zero 2 work for basic capture, but it is not a good choice if you want a system that feels responsive, flexible, or future-proof.

A practical way to choose

If you are trying to decide quickly, think about your situation like this:

  • If you are buying new and want the best overall experience, get a Pi 5 with 8 GB.
  • If you want a strong but cheaper option, get a Pi 4 with 4 GB.
  • If you already have a Pi 4 with 2 GB, it is still a sensible Allsky machine.
  • If you already have a Pi 3B+, try it before spending money, but expect slower processing.
  • Avoid the Pi Zero family unless you are knowingly accepting the limitations.

Memory matters more than many people expect

People often focus on CPU speed first, but memory is just as important for Allsky.

The reason is simple: captured images may be large, and some of Allsky's extra outputs, especially timelapses, need working space while they are being created. The higher the image resolution, the more memory pressure you can expect during processing.

When there is not enough RAM available, Linux starts leaning harder on swap. That keeps the system alive, but it is much slower, and if swap is on the SD card it also increases write wear.

In practical terms:

  • 8 GB gives the most comfort and future headroom.
  • 4 GB is a strong, balanced target.
  • 2 GB is workable for many systems.
  • 1 GB is where compromises become much more noticeable.

If you are using a high-resolution camera and care about timelapses, memory becomes even more important.

Heat, power, and enclosure design

Pi choice is not just about performance. It also affects how much heat you must deal with inside the enclosure.

This matters because an allsky camera is not sitting on an open desk in a cool room. It is often placed in a sealed or semi-sealed housing, sometimes in direct sunlight, sometimes in warm weather, and sometimes near a camera that also produces heat.

Things worth keeping in mind:

  • Faster Pis usually run hotter.
  • A Pi 5 generally needs more careful cooling than a Pi 4 or Pi 3.
  • Poor ventilation can affect both the Pi and the camera.
  • Higher temperatures can increase image noise and may reduce long-term reliability.

That does not mean you should avoid fast hardware. It means you should think about the enclosure as part of the hardware choice. A fast Pi in a poorly ventilated case may be a worse real-world system than a slightly slower Pi in a well-designed housing.

Power also matters. Unstable power causes strange and frustrating problems, and they are often mistaken for software or camera faults. If possible, use a reliable power supply appropriate for the Pi model you choose.

Storage and SD cards

Allsky does not just store configuration. It stores images, thumbnails, startrails, keograms, and timelapse videos. That means storage fills up faster than many first-time users expect.

We suggest using at least a 128 GB SD card. If a 256 GB card fits your budget, it is a very reasonable choice and gives you more breathing room.

The main advantages of a larger card are:

  • more time before you need to prune images
  • more room for timelapses and derived products
  • more flexibility when testing settings or storing extra history

For speed, a V30-rated SD card is a good choice.

That said, SD card speed is rarely the main thing that limits Allsky in normal use. Capacity, reliability, and endurance usually matter more than headline speed. Unless you are copying large amounts of data frequently, you are unlikely to notice dramatic differences from one decent card to another.

SD card versus SSD

If you are choosing between a larger SD card and an SSD, the practical trade-off is:

  • SD cards are simple, compact, inexpensive, and easy to fit into an allsky build.
  • SSDs are faster, generally more durable, and often available in larger capacities.

For many people, the SD card is the simplest answer. For others, especially those using a Pi 5 or wanting a more durable storage setup, an SSD can be a better long-term choice.

If you want concrete starting points, these combinations are sensible:

Strong new build

  • Pi 5, 8 GB RAM
  • quality 128 GB or 256 GB SD card, or SSD if appropriate for the build
  • attention to cooling and airflow

This is the best all-round choice if you want a system that feels fast and has room for the future.

Balanced budget build

  • Pi 4, 4 GB RAM
  • 128 GB SD card

This is still a very good Allsky platform and is likely the best value option if you do not want to pay Pi 5 prices.

Reuse existing hardware

  • Pi 4, 2 GB RAM or Pi 3B+
  • larger SD card if needed

This can work well if you already own the hardware and want to start without buying everything new.

Pi clones and alternatives

In general, do not assume Raspberry Pi clones will work just because they look similar on paper.

Allsky has not found most Pi clones to be reliably compatible. The one partial exception noted so far is Le Potato, and even that has very limited compatibility and is not a general recommendation.

If your goal is a straightforward, supportable Allsky installation, a genuine Raspberry Pi is by far the safer choice.

Final advice

If you only remember three things from this page, make them these:

  1. Buy more memory than the bare minimum if you can.
  2. Think about heat and ventilation as part of the Pi choice.
  3. Use a larger, decent-quality storage device from the start.

A Pi that is slightly more capable than you need today is usually a better purchase than one that only just manages the current workload. Allsky tends to be far more enjoyable when the system has some breathing room.