Blocking 500,000 items with a $2 microcontroller: A memory-efficient DNS ad blocker using the ESP32-C3

I read an article from an overseas media outlet titled Open-source ESP32-C3 DNS ad blocker supports up to over 500,000 ...
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This tiny ESP32 gadget blocks 537,000 domains while using just 50KB of RAM

This ESP32-C3-powered project blocks 537,000 ad domains using just 50KB. Stores 5-byte (40-bit) domain hashes in flash and binary-searches them to avoid using RAM. Build your own $5 ESP32-C3-powered ...