Arduino UNO R3 vs ESP32-DevKitC

Rows with a value for both boards are shown; keys that exist for only one board are omitted from the comparison. Not an editorial comparison; no recommendation is made. Values inherit the classes of the linked records. Board-level and chip-level quantities differ (ESP32 values are chip-level; UNO R3 operating voltage is the 5 V board rail). The cpu_clock_max row compares the UNO R3 board clock (16 MHz resonator; the ATmega328P chip itself is rated 20 MHz) with the ESP32 chip maximum (240 MHz), so it is not a like-for-like board or chip comparison. The interfaces lists are non-exhaustive tags, not complete feature lists.