Actually, the most popular ESP32 (DevkitC) board can be had for $4 or so: https://aliexpress.com/item/4001076883280.html https://aliexpress.com/item/40010768832

Actually, the most popular ESP32 (DevkitC) board can be had for $4 or so: https://aliexpress.com/item/4001076883280.html https://aliexpress.com/item/4001076883280.html