DEVLOG #1 - One Board Air quality sensor

Hello everyone! Today I started working on the first stage of my Air quality monitor.
First of all:
What do I want to achieve with this project?
A cost effective solution for people to protect themselves against invisible dangers.

For my first devlog I started by brainstorming a list of features I want to have and what parts & sensors are required to achieve those feature.

The brains of the project are the ESP32 C3-Wroom-02
It’s cheap, powerful, and includes Wifi + Bluetooth.
The first sensor I’m using is the BME280. It’s a very precise Temperature, humidity & pressure sensor and is the baseline of my project.

The next sensor I’m using is the MQ-135. This nifty sensor monitors all sorts of things like Ammonia (NH₃), Sulfide, Benzene, Alcohol, Smoke, and CO₂.

Although this sensor does draw a significant amount of energy, and has to warm up before being able to measure data it’s much cheaper, and keeping in mind one of the goals is to keep cost down, this sensor does its job.

But….how will I be able to see the data?

Simple, the PCB will include a 1.8” LCD which will display all of the important metrics.

Powering it will be as simple as plugging in any old USB-C cable.

Right now, I have created a rough sketch of the PCB, though some key things are still missing.

I would love to hear feedback if you have any!

The next part is completing the PCB and building some prototypes.