If you want to follow this project and you have a different ESP32 model, you can assemble the circuit on a breadboard or you can modify the PCB layout and wiring to match the pinout of your ESP32 board. Tests performed on different models show a power consumption between 8 and 15♚, which puts it at the top of low-power ESP32 boards in Deep Sleep mode. We’re using the ESP32 DEVKIT DOIT V1 board (the model with 36 GPIOs). RX0 / TX0 are used by the onboard silabs USB/serial chip and shouldnt be used for UART in your project. Doesn’t look like there is a part for this exact board but a search for fritzing part ESP32DevKitCV4 turns up this one which may be close enough (it looks to be slightly longer and have a couple of mounting holes the one you want does not have but the. Doesn’t look like there is a part for this exact board but a search for fritzing part ESP32_DevKit_C_V4 turns up this one which may be close enough (it looks to be slightly longer and have a couple of mounting holes the one you want does not have but the pins look the same, don’t know about the width though.) Warlib1975/Fritzing-parts/blob/master/MH-ET LIVE ESP32 DEVKIT 38 pins.fzpz PKµpNR0ÆqðOCpart.MH-ET LIVE ESP32 DEVKIT_b9055ceddb827445366a4e41b4f2f6c6_2.fzpÅÝrÛ¸ïý(/ÖíL%?(ÖNj)kOâ$c)ÞíÞd(8¡H.Ùq:é«ô It is a variant of the uPesy ESP32 Wroom Devkit board optimized to minimize power consumption when the ESP32 is in Deep Sleep mode. See this excellent overview of the ESP32.