U1 ESP32-S3-WROOM-1 2.4 GHz WiFi (802.11 b/g/n) and Bluetooth ® 5 (LE) module Built around ESP32S3 series of SoCs, Xtensa ® dualcore 32bit LX7 microprocessor Flash up to 16 MB, PSRAM up to 8 MB 36 GPIOs, rich set of peripherals Onboard PCB antenna U2 AP63200WU 2A, 500kHz Buck DC/DC Converter, adjustable output voltage, TSOT-23-6 U4,U7-U10,U15 LTV-357TB DC Optocoupler, Vce 35V, CTR 50%, SO-4 AE1 Antenna Antenna C1,C7,C13,C14 1uF Unpolarized capacitor C2,C8-C11,C15 100nF Unpolarized capacitor C3 10uF Unpolarized capacitor C4,C5 22uF Unpolarized capacitor C6 100pF Unpolarized capacitor C12 220pF Unpolarized capacitor D1 D_Zener Zener diode D2 SM712_SOT23 7V/12V, 600W Asymmetrical TVS Diode Array, SOT-23 D3,D5-D7 SMF24A 200W unidirectional Transil Transient Voltage Suppressor, 24Vrwm, SMF D4 1N4007 1000V 1A General Purpose Rectifier Diode, DO-41 J1,J2,J4,J7-J9 Screw_Terminal_01x03 Generic screw terminal, single row, 01x03, script generated (kicad-library-utils/schlib/autogen/connector/) J3,J12 Screw_Terminal_01x04 Generic screw terminal, single row, 01x04, script generated (kicad-library-utils/schlib/autogen/connector/)