Today I was working on my ESP config code and discovered that it can actually run as an access point (AP).
I’m inclined to use this as a configuration method (a pretty obvious one, to be honest) instead of Bluetooth.
Why? Because making a debug Bluetooth app was really boring.
So, I had the idea to make a smoke detector (gas too, but that’s just a bonus) that doesn’t require a fire central
(I really don’t know what those things are called outside Brazil) to log information to a network.
The hardware would be simple, but it would require software that’s much more complex than anything I’ve done here before.
Today’s project is a temperature monitor built using a DHT22 sensor and an RGB LED as output. I didn’t have the motivation to fine-tune the intervals or calibrate the sensor data, so the output isn’t particularly impressive. I also only had two 330Ω resistors on hand to drive the LED, so I was limited to the red-green range (with yellow in between).
My project today is just a little experiment on state processing. Just a green LED with a button that cycles it’s levels from 0 to 3.
Before diving into anything barely practical, we need to start with the basics. The go-to basic embedded project is the blinking LED, but I don’t like something so simple. Instead, my first project will be a LED blinking device that uses two buttons to select a power blink level while pressed.
