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Expressif Systemsの品番ESP32-S2-DEVKITM-1とESP32-S2-DevKitM-1R の違いは、部品に「PSRAMダイ内蔵」を表す「R」サフィックスが付いているかどうかです。
1965-ESP32-S2-DEVKITM-1-ND
1965-ESP32-S2-DEVKITM-1R-ND
オリジナル・ソース（英語）
