Hmm. Actually have all of that except the esp on hand

No soldering needed?

Yes, no soldering. Here's an example of the sort of thing that is sat on my desk:

https://lastminuteengineers.com/esp8266-dht11-dht22-web-serv...

If a NodeMCU board is too big for you then an ESP 01S is smaller and even cheaper. Less I/O options though but very useful. Needs a writer and wires to program. You can get one with a relay that is capable of switching 16A.

https://frenck.dev/diy-smart-doorbell-for-just-2-dollar/ - here's an example of a project. $2 is a bit ambitious I spend £7 for two of them on Amazon. That's two ESP-01S and two relays!

I don't do Arduino. esphome is a lot easier for me. You use pip to get the thing installed under your user account. Write a .yaml file which is largely copy and paste from examples and then install it through a USB cable the first time and then over the air after that.

Thank you, I've got software expertise but no hardware at all, I've been looking for something like this.

The ESP 01S is particularly good once you get to grips with writing to them because you can power them from any old phone charger that spits out 5V. You simply cut off the plug, look for the wire with the white stripe on it to determine polarity, strip the ends and screw into the relay block.

Be prepared to wave goodbye to your spare time and seriously consider a separate VLAN/SSID for these things.

Heh, I came across your site last week, so thank you! (Oh, maybe it's not your site)

I got the DHT22 to work at 3.3V. But an old 1-Wire DS18B20 I have is very finicky. The pullup needs to be 500-800 ohms. Any experience with 1-wire at 3.3V? (Parasitic power mode). Worked great on a 5V nano.