I was looking for a way to segment some IoT devices from my main network and disable their network connections on demand programmatically. The Guest Network feature on the router does a good job of segmenting the network, so I wanted a way to turn the guest network’s interface off and on based upon conditions.
Example scenario: You have cloud-based IoT cameras and want to cease all traffic when you’re home.
This puts toggling any interface on the router behind an HTTP endpoint. Since an interface is created when a guest network is enabled, we can now enable and disable that network whenever we want.
The time has come: My 2009 Mac Pro has been retired and replaced with a 2016 MacBook Pro. Not only has the temperature in my home office dropped about 4°F, but I can now run the latest macOS, Xcode, and Docker, which I need for work (for that money stuff). I held on to the Mac Pro as long as I could, though, and I can confidently say that the “cheese grater” desktop is the best machine I’ve ever purchased.
A new setup presents new challenges. One issue I’ve found is switching states between “docked” and “undocked”. I put this in quotes since Apple doesn’t have a true docking station solution. Because of this it’s way too easy to rip out the USB connectors when “undocking”, which could lead to a dirty removal of a volume (e.g. something hasn’t been flushed out of cache to the actual hardware yet and data is corrupted / lost). Since I have a Time Machine drive connected at my desk, this can happen if I don’t remember to eject it from Finder.
I think this process would be easier with an external button to do the work for me before disconnecting the laptop. Currently in the hack phase, I’ve wired up an Arduino with an RGB pushbutton that communicates to a macOS app. When it’s time to undock I simply press the button to unmount all volumes and get visual feedback that it’s safe to pull the plugs…
This past weekend I (finally) set up Grafana to visualize information about my machines with the usual stats like CPU usage, memory utilization, network throughput, etc. After reading up on how simple it was to add time-series data to InfluxDB, I pondered how nice it would be to also have my Apple Health data.
I wrote some Python to take the massive file that Apple lets you export (in a clunky, manual operation at the moment) and pull it into InfluxDB so that Grafana could visualize it. Check it out!
“Because my garage door doesn’t need an operating system”
I admit – I went a little overkill with the Raspberry Pi garage door opener. A machine so complex was being used to do something so simple: Perform a button press. Why did it need graphics capabilities? A multicore processor? Cron jobs? It didn’t.