Ever heard of logging in without passwords? I stumbled upon the FIDO2/WebAuthn standard and it’s actually pretty cool—just your fingerprint and you’re in. I looked into how it works, its pros, and some open questions that still bug me (like… what if you lose the device?). Check it out!

While building my CO2 sensor, I wanted to manage the device over WiFi—no buttons, no cables. So, I made a sleek web-based config panel using VueJS and Tailwind CSS, all running right on the ESP8266. Here’s how I replaced manual setup with a modern, async, file-based config system.

Ever feel like the air in your room gets a bit… stale? I picked up a cheap MH-Z19b CO2 sensor and built a simple home air quality monitor using an ESP8266 and some DIY magic. Here’s how I prototyped it (twice!) and got it up and running with WiFi and colorful LED alerts.