The Artemis Watch 2.0, made by CircuitMess, is a $129 programmable smartwatch designed less as a gadget you wear and more as something you can digitally rebuild into your own creation.
It's why DIY smart home projects suddenly got cheap (and actually doable) ...
The ESP32 does everything a Pi Pico does, but costs less and lasts 100x longer on batteries ...
An LM555 timer paired with an NTC thermistor makes a simple, configurable ON/OFF thermostat for heating or cooling.