stratigrafia

Moon over cliff

by Steven Holland

Thoughts on programming, science, nature, and growth through willful change. Oh, and pop-tarts.

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SSH into a Headless Raspberry Pi

21 April 2017

In my latest explorations of the Raspberry Pi, my goal is to use its GPIO pins as a sensor and report the results on a web page, combining the capabilities of the Pi’s. In this post, I set up my Pi to run headless, that is, without a monitor, keyboard, and mouse. To do that, I’ll need to access it through secure shell.

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Swift on Raspberry Pi

16 April 2017

Since being open-sourced by Apple, Swift has been ported to a a variety of platforms, which is good news not only for code reuse and writing in a consistent language, but also because Swift has many good features. I like writing in Swift, in part because it forces me to think critically about what each method returns.

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Preserving User’s Data

16 January 2017

Years ago, many scientists I knew used three Mac apps to plot their data, CricketGraph, KaleidaGraph, and DeltaGraph. Although some of these are still available, some after checkered histories of availability, most scientists I know have moved on to other options, especially R. These apps had proprietary binary data formats for storing the data, the scientist’s data. You were locked in...

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FTDI Drivers AND OS X 10.11

24 July 2016

While building a new Arduino project on OS X El Capitan (10.11), I wasn’t able to connect using a serial port. Getting the serial port as an option was possible with some temporary changes to Apple’s System Integrity Protection.

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David Raup and Balance

24 April 2016

I have one observation about Dave that I'd to share with you. We don't become rich by doing paleontology; we do it because it fascinates us. Because of that, …

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The Basics of Closures in Swift

8 January 2016

Closures are one of the great features in Swift.

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Late-summer caterpillars

7 September 2015

The end of summer has brought a profusion of caterpillars to our yard, and many of them look like something out of Dr. Seuss.

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Salamanders

8 August 2015

I went out for a short hike this morning with my 11-year-old son. One of our favorite nearby hikes is the orange trail at the State Botanical Gardens here in Athens. One of the reasons it’s a favorite is the stream and the chance to explore for critters.

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Arduino and R

22 February 2015

Like Hepburn and Bogart, Arduino and R are made for each other. The only trick is getting the two to talk. I came across a recent post on Mages’ blog with that trick. With it, I made R read temperature data from the Arduino and plot it in real time.

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DIY Arduino Board

17 January 2015

Arduino boards have come down in price, but you can make your own for about $10. It’s pretty simple, and it’s a good way to learn how an Arduino board works.

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Start Something New

11 January 2015

What I’ve always admired about Apple is their emphasis on creativity. Inspired by their post Start Something New a couple of weeks ago, I’ve started exploring with my camera.

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Indispensable Tools

31 December 2014

Dave Verwer’s most recent issue of iOS Dev Weekly got me thinking about the tools I use in development. Like Dave, I thought this would be a good time to review which are the most helpful to me.

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Data and iOS

6 September 2014

In updating one of my apps (Coordinates) to using storyboards instead of .xib files, I took the opportunity to rethink how the app worked as a whole..

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