🔐 ESP32 Ad-Blocking Dongle This project turns a low-cost ESP32-C3… — Embedded Systems

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ESP32 Ad-Blocking Dongle

This project turns a low-cost ESP32-C3 microcontroller into a compact backup DNS ad-blocking device. By using smart data compression techniques, it can block hundreds of thousands of domains while operating with very limited memory and power.

Features of the project:

Blocks 537,000 domains

Uses 40-bit hashing

Requires only 50KB RAM

Offers 10ms DNS responses

The novelty of this project lies in squeezing large-scale DNS filtering into extremely limited hardware. By replacing traditional domain storage with an efficient hashing system, it shows that even a tiny $5 microcontroller can handle tasks usually reserved for more powerful devices.