It is amazing how far these little ESP32s have come. To think you can buy one for $10 that has wifi, bluetooth, 32MBs of Flash, a display, battery charging, tons of IO including ADC, DACs, UARTS, SPI, and GPIOs.

The Raspberry Pi Zero W has more power of course, but if you want something small and embedded with greater reliability these are so easy to use.

You can even do everything through the Arduino interface and libraries which is super easy to setup and build from.