iTerm2 Glucose


iTerm2 with oh-my-zsh is my goto environment for doing anything on the command line. The tool allows infinite amounts of customization. Recently they announced a feature called the status bar. You can check out the feature here. It lets you display nifty information like current CPU/Network/Mem Utilization. What is really cool though, is that you can take it a step further. You can customize it to display your current kubernetes context or even your current AWS Profile. This got me thinking, I wonder if I could display my current Blood Glucose there?

Problem Statement

So the question is, how can I display my current blood glucose on my terminal.

First Attempt

I am running an open source website called Nightscout that scraped my blood glucose data from a continuous glucose monitor that I wear on my body. This site also exposes an endpoint I can GET to obtain my current blood glucose reading. So my first thought was, this should be simple. All I need to do is curl that endpoint and then display that in my terminal.

Not so FAST!

I immediately noticed that while this solution worked, it seriously slowed down the speed of my terminal. What was happening was that every time I executed a command, my terminal would attempt to update my current glucose by curling the endpint. This added about half a second of latency to my terminal, that gives the immpression of an unresponsive dev tool.

There has to be a better way…

And there is! I decided that what I could do instead is just have a cron job that runs on my mac, curls that endpoint every 3 mintues, and writes the result to a file. Then from there, I could just output the text of that file in my terminal prompt! Now that is super fast!

Hey, this sounds cool, how do I get set up?

Check out the repo at github. There you will find all the instructions you need to get setup. Happy Hacking