Coding Notions

Automated Backup with Rclone and a systemd Timer

There are many options for creating backups. Some solutions have extensive user interfaces or features such as encryption, compression, deduplication and block level incremental backup. A nice open source example of this is Duplicati. I chose a simple setup with Rclone because it fits my needs well. Rclone can synchronize

Caching Everything on Cloudflare and Automating Purge

Websites often have content that rarely changes. Cloudflare offers a free service that hosts your content on 200+ servers around the world. As content changes, the cached copies are invalidated and fetched from the origin server. In this way, a website can handle millions of requests at high speed with

Creating a Smart Air Quality Sensor

The west coast fires of September 2020 produced massive amounts of smoke and air pollution rose to dangerous levels. I stumbled upon the PurpleAir PA-II air quality sensor which was providing much of the state-wide air quality data. Internally it uses a PMS5003 and I picked one up for $20