AHT20 update, and my open source experience

It’s been more than two years since I released my AHT20-driver (a Rust driver for a temperature and humidity sensor). I’ve had a lot of support and friendly interactions as a result, and I’d like to highlight what a pleasant experience it’s been.

The AHT20 sensor is a temperature and humidity sensor by the company Asair. I used the Adafruit AHT20 board during development. The driver is written in Rust, which I’ve come to really enjoy programming in.

AHT20 thermometer driver

I wrote a new driver for the AHT20 temperature and humidity sensor in Rust. This is a continuation of my Barometer build article, where I re-use the lps25_pressure_sensor_demo project to add a temperature sensor on the with_aht20_sensor branch.

I’m a complete novice at Rust and embedded programming. These projects are my attempts to learn more about both while having fun and making something useful.

You can find the driver at:

• crates.io
• github
• docs.io

If you have an I2C device and delay configured, this is how you use the driver:

Barometer build

I put together a barometer, built around Adafruit’s LPS25 breakout board, the Blue Pill microcontroller, and a small 16x2 character LCD panel. It was a learning project, and all of it was written in Rust.

The finished project is a tangle of wires on a breadboard, and the error handling is minimal, but I definitely have a barometer with an LCD readout.

You can get the code in my lps25_pressure_sensor_demo github repo.

Ear defender headphone build

I work in a very noisy open plan office, which makes it hard to focus. To solve the problem, and still let me listen to some music, I made these noise blocking headphones. They’re built from heavy-duty Peltor ear defenders, usually worn in industrial settings to block harmful noise levels from damaging your hearing.

I’d like to show you how I made them, so that you can do the same. Here’s a picture of what they look like: