This is part 2 of a three-part series covering the odyssey of getting a new coffeemaker, learning BTLE and how it works, reverse-engineering the Bluetooth interface and Android applications for the coffeemaker, writing a Rust-based CLI interface, and finally, hooking it all up to a GitHub actions bot that lets you brew a coffee just by filing an issue!

• Part 1: Introduction
• Part 2: Reverse Engineering
  • Understanding the Packets
  • Disassembling the Delonghi APK
  • Revisiting the Brew Command
  • Further Reading
• Part 3: GitHub Actions

This is going to be a long journey in three parts that covers the odyssey of getting a new coffeemaker, learning BTLE and how it works, reverse-engineering the Bluetooth interface and Android applications for the coffeemaker, writing a Rust-based CLI interface, and finally, hooking it all up to a GitHub actions bot that lets you brew a coffee just by filing an issue!

• Part 1: Bluetooth Investigation
  • Introduction
  • BTLE Background and Traffic Sniffing
  • Communicating in Rust
  • Further Reading
• Part 2: Reverse Engineering
• Part 3: GitHub Actions

Introduction

Given the all the fuss over the blue/black or white/gold dress this week, I whipped up a quick simulation that allows you to view the dress under different lighting conditions.

Slide the control from side-to-side to fade between the three images: a “blue/black” version where we subtract out the theoretical color of the light (#524922), the original picture, and a “white/gold” version where we add color to compensate for the perceived shadow (#392c00).

qz.com picked this up and created their own version as well.

Two new technologies – the modular smartphone and USB 3.1 – are set to radically accelerate the convergence of everything to a single, in-pocket device. In fact, they are so revolutionary that they will change the entire way we think about mobile computing as the iPhone did earlier this millennium.

Modules will eat custom hardware

Modular smartphones, the first of which being Project Ara, will shift the way we buy devices while opening up new markets.

Please note that this article is written about an Editor’s Draft of a specification as of January 2015, which means the information may change without notice

CSS Selectors Level 4 is the next iteration of the CSS selector spec, the last version of which was made a recommendation in 2011 after being a working draft for a number of years.

So, what’s new?

Selector Profiles