macOS Archives - App Code Labs

June 5, 2019

Using a Software Defined Radio to Debug LoRa Communication Problems

As part of my ongoing “Introduction to IoT” series, in this article you’ll learn how to use a cheap software defined radio (SDR) to diagnose problems between different LoRa radios and drivers. SDR can be invaluable when diagnosing LoRa link problems, especially when using new and untested hardware and software. What follows is an account of the many problems I...

Electronics/ESP32/Hardware/IoT/LoRa/macOS

May 20, 2019

Introduction to IoT: Building a Budget, Single-Channel LoRa to MQTT Gateway

You don’t need an expensive LoRaWAN gateway to get started with IoT using LoRa. In this tutorial you’ll learn how to build a simple, single-channel gateway so you can experiment with a LoRa to MQTT gateway, and try out the unique properties of LoRa before investing any significant money into it.

Arduino/ESP32/Hardware/IoT/Linux/LoRa/macOS/MQTT/Raspberry Pi

February 11, 2019

Getting Started With Lattice IceStick FPGA Using Open Source Tools on MacOS

The Lattice IceStick evaluation board is a great way into the exciting new world of FPGAs. It has opened up the traditionally closed world of FPGA development to hobbyists and makers. But working out how to install a development toolchain can be daunting, especially for Mac users. This tutorial is a step-by-step guide on how to bypass the official tools...

Arduino/Electronics/FPGA/macOS/Microcontrollers

January 15, 2019

Introduction to IoT: How to Send MQTT Messages From iOS Using Swift

Mobile is the natural way to control IoT devices. But even controlling a simple on/off switch requires a fair amount of code, and it can be hard to figure out where to start. This tutorial shows you how to build a simple MQTT publisher client app using Swift on iOS. It goes without saying that mobile and IoT should fit...

Electronics/ESP8266/macOS/MQTT/Swift

December 17, 2018

How to Backup & Clone a Raspberry Pi SD Card on macOS the Easy Way

Do you struggle to remember how to backup a Raspberry Pi SD card on your Mac? Have you ever found it difficult to identify the physical device on the command line? Do you find online tutorials gloss over important details, or are just plain wrong? This tutorial will explain everything step-by-step, easily and safely. There are plenty of reasons for...

Electronics/Linux/macOS/Raspberry Pi/Unix

November 26, 2018

Stop Being Afraid Of Regular Expressions: 9 Essential Patterns You Should Learn

Regular expressions have a somewhat daunting reputation. Arguably one of the most useful inventions in computing history, they are nonetheless regarded with equal measures of awe and dread even by some experienced programmers. Why is this? Regular expressions are actually straightforward to understand and use. But their reputation has not been helped by people copying large and complex patterns from...

Linux/macOS/Regular Expressions/Shell scripting/Unix

September 16, 2018

Advanced Wildcard Patterns Most People Don’t Know

If you’re a macOS Terminal or Linux shell user you may be familiar with simple wildcard patterns. But most people don’t know the more advanced patterns, which occupy a kind of netherworld between simple wildcards and their more complex cousins, regular expressions. In this article you’ll learn about these patterns and their hidden power. In my article Think You Understand...

Linux/macOS/Shell scripting/Uncategorized/Unix

August 12, 2018

Wildcards in Unix & macOS: Why Most People Only Think They Understand Wildcards

A very useful concept on the macOS (and Linux) command line is that of wildcards. Many casual command line users will have a passing familiarity with them but most people don’t really understand how they actually work. Free Video Course! The content of this post is now covered in some depth on my Udemy course Learn to be a macOS...

Linux/macOS/Shell scripting/Unix

Category: macOS