## Putting the Wolfram Language (and *Mathematica*) on Every Raspberry Pi

### November 21, 2013

Last week I wrote about our large-scale plan to use new technology we’re building to inject sophisticated computation and knowledge into everything. Today I’m pleased to announce a step in that direction: working with the Raspberry Pi Foundation, effective immediately there’s a pilot release of the Wolfram Language—as well as *Mathematica*—that will soon be bundled as part of the standard system software for every Raspberry Pi computer.

In effect, this is a technology preview: it’s an early, unfinished, glimpse of the Wolfram Language. Quite soon the Wolfram Language is going to start showing up in lots of places, notably on the web and in the cloud. But I’m excited that the timing has worked out so that we’re able to give the Raspberry Pi community—with its emphasis on education and invention—the very first chance to put the Wolfram Language into action.

I’m a great believer in the importance of programming as a central component of education. And I’m excited that with the Wolfram Language I think we finally have a powerful programming language worthy of the next generation. We’ve got a language that’s not mostly concerned with the details of computers, but is instead about being able to understand and create things on the basis of huge amounts of built-in computational ability and knowledge.

It’s tremendously satisfying—and educational. Writing a tiny program, perhaps not even a line long, and already having something really interesting happen. And then being able to scale up larger and larger. Making use of all the powerful programming paradigms that are built into the Wolfram Language.

And with Raspberry Pi there’s something else too: immediately being able to interact with the outside world. Being able to take pure code, and connect it to sensors and devices that do things.

I think it’s pretty amazing that we’re now at the point where all the knowledge and computation in the Wolfram Language can run in a $25 computer. And I think that it’s the beginning of something very important. Because it means that going forward it’s going to be technically possible to embed the Wolfram Language in pretty much any new machine or system. In effect immediately injecting high-level intelligence and capabilities.

I’ve waited a long time for this. Back in 1988 when *Mathematica* was first released, it could only just fit in a high-end Mac of the time, but not yet a PC. A decade later—even though it had grown a lot—it could run well on pretty much any newly sold personal computer. But embedded computers were a different story—where one expected that only specially compiled simple code could run.

But I knew that one day what would become the Wolfram Language would be able to run in its complete form on an embedded computer. And now it’s clear that finally that day has come: with the Raspberry Pi, we’ve passed the threshold for being able to run the Wolfram Language on an embedded computer anywhere.

To be clear, the Raspberry Pi is perhaps 10 to 20 times slower at running the Wolfram Language than a typical current-model laptop (and sometimes even slower when it’s lacking architecture-specific internal libraries). But for many things, the speed of the Raspberry Pi is just fine. And for example, my old test of computing 1989^1989 that used to take many seconds on the computers that existed when *Mathematica* was young now runs in an immeasurably short time on the Raspberry Pi.

From a software engineering point of view, what’s being bundled with the Raspberry Pi is a pilot version of our new Wolfram Engine. Then there are two applications on the Pi powered by this engine. The first is a command-line version of the Wolfram Language. And the second is *Mathematica* with its notebook user interface, providing in effect a rich document-based way of interacting with the Wolfram Language.

The command-line Wolfram Language is quite zippy on the Raspberry Pi. The full notebook interface to *Mathematica*—requiring as it does the whole X Window stack—can be a trifle sluggish by modern standards (and we had to switch a few things off by default, like our new Predictive Interface, because they just slowed things down too much). But it’s still spectacular: the first time *Mathematica* has been able to run at all on anything like a $25 computer.

And it’s the whole system. Nothing is left out. All 5000+ Wolfram Language functions. All capabilities of *Mathematica* and its notebook interface.

For me, one of the most striking things about having all this on the Raspberry Pi is how it encourages me to try a new style of real-world-connected computing. For a start, it’s easy to connect devices to a Pi. And a Pi is small and cheap enough that I can put it almost anywhere. And if I start a Wolfram Language program on it, it’s reliable enough that I can expect it to pretty much go on running forever—analyzing and uploading sensor data, controlling an autonomous system, analyzing and routing traffic, or whatever.

Building in as much automation as possible has been a longstanding principle of mine for the Wolfram Language. And when it comes to external devices, this means consistently curating properties of devices, and then setting up general symbolic functions for interacting with them.

Here’s how one would take this whole technology stack and use it to switch on LEDs by setting voltages on GPIO pins:

And here’s some image analysis on a selfie taken by a RaspiCam:

Something we’re releasing alongside the Raspberry Pi bundle is a Remote Development Kit, that allows one to develop code and maintain a notebook interface on a standard laptop or other computer, while seamlessly executing code on a networked remote Raspberry Pi. The current RDK connects to a copy of *Mathematica* (such as *Mathematica Student Edition*) running on any Mac, PC or Linux machine; soon there will be other options, for example on the web.

Within the Wolfram Language there’s actually a whole emerging structure for symbolically representing remote running language instances—and for collecting results, dispatching commands, doing computations in parallel, and so on. We’re also going to have WolframLink (derived from the *MathLink* protocol that we’ve used for nearly 25 years), that’ll let one exchange code, data or anything else in a very flexible way.

I’m very excited to see what kinds of things people invent with the Wolfram Language on the Raspberry Pi—and I look forward to reading about some of them in the Wolfram+Raspberry Pi section on Wolfram Community, as well as on the Raspberry Pi Foundation website.

In the next few months, it’s all going to get more and more interesting. What we’re releasing today on the Raspberry Pi is just the first pilot for the Wolfram Language. There’ll be many updates, particularly as we approach the first production release of the language.

As with Wolfram|Alpha on the web, the Wolfram Language (and *Mathematica*) on the Raspberry Pi are going to be free for anyone to use for personal purposes. (There’s also going to be a licensing mechanism for commercial uses, other Linux ARM systems, and so on.)

As a footnote to history, I might mention that the Raspberry Pi is only the second computer ever on which *Mathematica* has been bundled for free use. (Not counting, of course, all the computers at universities with site licenses, etc.) The first was Steve Jobs’s NeXT computer in 1988.

I still regularly run into people today who tell me how important *Mathematica* on the NeXT was for them. Not to mention the gaggle of NeXT computers that were bought by CERN for physicists to run *Mathematica*—but ended up being diverted to invent the web.

What will be done with the millions of instances of the Wolfram Language that are bundled on Raspberry Pi computers around the world? Maybe some amazing and incredibly important invention will be made with them. Maybe some kid somewhere will be inspired, and will go on to change the world.

But one thing is clear: with the Wolfram Language on Raspberry Pi we’ve got a new path for learning programming—and connecting it to the real world—that a great many people are going to be able to benefit from. And I am very pleased to have been able to do my part to make this happen.