Clever Hacker Fits 537,000 Domains in a Tiny $5 ESP32 Ad-Blocking Dongle

Clever hacker fits 537,000 domains in a $5 ESP32 ad-blocking dongle

I built a network ad blocker using a cheap $5 ESP32 dongle that stores over half a million domains. The custom firmware runs on just 50KB of RAM and blocks unwanted lookups in under 10 milliseconds, proving powerful filtering doesn't require expensive hardware.