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Hacker News·3 min read·medium

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

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Clever hacker fits 537,000 domains in a $5 ESP32 ad-blocking dongle
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A developer has created a functional ad-blocking DNS filter using a low-cost $5 ESP32 microcontroller. The project utilizes a clever hashing technique to store over 500,000 blocked domains within the device's limited 4MB flash memory.

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This project uses a clever hashing trick to fit over half a million blocked domains into just 4MB of flash memory.

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