$2 ESP32 board runs Pi-hole-style DNS blocker with 140K domains in 0.7MB
LinusEkenstam · x · 2026-10-12
An open-source project runs a Pi-hole-style DNS ad-blocker on a $2 ESP32-C3 board. Per its README, it stores 140,000+ blocked domains as short hashes in about 0.7 MB of flash while using only 50 KB of RAM. The author quips that this $2 chip enforces one rule on every device in your house — something most AI companies can't claim.
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