[deepspace]

Yes, most certainly. Development boards like the Arduino suite, Adafruit Feather series, various ESP32 / ESP8266 boards and even the Raspberry Pi Pico makes it really easy to whip together a simple (or more complex for that matter) project at low cost and with little effort.

Add to that cheap PCB professional manufacturing, and the world is your oyster.

Some of the projects I have recently completed include:

- A door strike interface with RFID input that allows me to use my condo entrance FOB to open my apartment door.

- A custom sous-vide controller at 1/10th the price of a commercial one

- A secure hardware password manager.

- A cheap sensing unit installed in every room that measures light level, environmentals and presence, and communicates with my home automation system to adjust heat, cooling and light levels automatically throughout the day.

Currently working on a remote ePaper notice board with updates through LoRa. As I said, the possibilities are endless and it is really easy to hack something together with the tools that are available these days.

[rootbear]

I've wanted to do something similar to your project of having a sensing unit in each room, or at least each level, of my townhouse. What do you use as the "presence" sensor? PIR?

[deepspace]

Yes, PIR.