Main components

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Part NumberDescription
74AHCT125Quadruple Bus Buffer Gates With 3-State Outputs
ESP32-PICO-MINI-02UESP32-PICO-V3-02U MCU, SiP, 8MB Flash, 2 MB PSRAM in ESP32-MINI-format
CP2105Single-Chip USB to Dual UART Bridge
ESP32-S3-WROOM-1RF Module, ESP32-S3 SoC, Wi-Fi 802.11b/g/n, Bluetooth, BLE, 32-bit, 3.3V, onboard antenna, SMD

totem schematic

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totem board layout

totem PCB render

Top PCB
Bottom PCB