I'm sorry that you went off forum. Hopefully you have learnt a lesson. FWIW, as a moderator here, I always try to discourage going off forum if I see anyone propose doing that. There is zero benefit to anyone to do that. It is not advisable to go off forum for a number of reasons - one of which is that you might get bad advice (e.g. don't use a breadboard) and there is no opportunity to have anyone else peer review such advice (I.e. say that is bad advice for these reasons). FWIW, it is a good idea to have a breadboard. Have a look at our Breadboards Explained guide in our wiki. The main benefit of having a breadboard is that you can hook components up to each other easily and more specifically daisy chain them together. For example a breadboard has power rails along each side. As you add more and more components you can just hook them up to the power rails which are fed by your arduino. This solves the problem of what to do when you run out of power connectors and the alternative is to twist bare wires together which risks creating a short if they touch each other which risks you damaging your arduino. A breadboard helps protect against that and makes it easier for you to wire stuff up. Do you need one? No, but life will be much easier if you have one. The arduino nano has an ATmega328P MCU at its core. The ATmega328P is what your program runs on. It is connected to all of the IO pins along the edge of your nano. The ATMega328P is the same MCU that is used on an Uno R3. So to all intents and purposes they will be the same in terns of functions. The main difference is the physical board size and the layout of the pins. If you are following an Uno (or any other board) project, you will need to translate the function of a pin from the guide to your nano. If you follow Uno tutorials, thus will be much easier as the pin numbering should be the same, but keep in mind they placement of the pins is different when comparing nano to uno. Did you get any components other than the terminal adapter (whatever that is)? If so what? You might want to look at the getting started guides on the arduino examples web site. Starting with some of the blink and button ones (which can be done with a pair of wires in place of the button)... https://docs.arduino.cc/built-in-examples/ More on reddit.com

200mA chip MAX of combined source (current pulled from pin when its HIGH and driving) and sink (current pulled by LOW output pin) or 40mA max per pin. Whichever limit is hit first. More on reddit.com

I dove into this for 15 minutes for take what you will from this:

An ESP32 should work, depending on the size of the board. Besides the size constraint, the only issue is hooking up the temperature sensor with the correct board pins. It seems they 3D printed the case with the Nano 33 BLE board in mind, so the headers on the temp module match with the correct pins on the board.

The article states, "When the water boils, the steam reaches the chip inside the mini device and alerts the user via their smartphone that the water is boiling." The Nano 33 BLE doesn't have a humidity sensor so this alert must be based solely on the temp module they've included. Otherwise this project would need the Nano 33 BLE Sense, and if using an ESP32, one with a humidity sensor on it (or attached).

Also, thanks for posting this. With electricity bills as they are, this could be a great investment.

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Newer boards have more features and run faster. They all work well from the Arduino IDE environment. Classic Nano/Uno compile and load much faster. Most of my projects use a Nano or a Pro Micro. These are great for all sorts of projects. If I need wireless WIFI or bluetooth or more memory I use one of the newer boards. Nanos, all flavors, , and RP2040s works well with a wireless breadboard. An Uno doesn't, it has sockets that accept jumper wires but no pins for a breadboard. ESPs are too wide to fit onto a single breadboard, although you can use two if you remove one of the bus strips and then connect them together. More on reddit.com