ESP32-C3

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Developer builds Pi-hole-style ad blocker on a $2 ESP32-C3●M-Abozaid/esp32-c3-adblock⬢github196just now
A developer going by M-Abozaid has released an open-source project that turns a $2 ESP32-C3 microcontroller into a network-wide DNS ad blocker comparable to Pi-hole. It stores 537,000 blocked domains as 40-bit FNV-1a hashes in flash and searches them with binary search, running a UDP DNS sinkhole with a web dashboard — all without PSRAM. The project is drawing attention on GitHub for fitting so much into minimal hardware.

M-Abozaid/esp32-c3-adblock Pi-hole-class DNS ad-blocker on a $2 ESP32-C3 (no PSRAM): 537k domains as 40-bit FNV-1a hashes in flash, binary-searched