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,U5,U8,U9,U11,U12 LTV-357TB DC Optocoupler, Vce 35V, CTR 50%, SO-4 AE1 Antenna Antenna C1,C11 1uF Unpolarized capacitor C2 10uF Unpolarized capacitor C3,C7-C10,C12 100nF Unpolarized capacitor C4 100pF Unpolarized capacitor C5,C6 22uF Unpolarized capacitor D1,D2,D4 SMF24A 200W unidirectional Transil Transient Voltage Suppressor, 24Vrwm, SMF D3 SM712_SOT23 7V/12V, 600W Asymmetrical TVS Diode Array, SOT-23 J1,J2,J4,J7,J10,J11 Screw_Terminal_01x03 Generic screw terminal, single row, 01x03, script generated (kicad-library-utils/schlib/autogen/connector/) J3,J8 Screw_Terminal_01x04 Generic screw terminal, single row, 01x04, script generated (kicad-library-utils/schlib/autogen/connector/) J5,J6 Screw_Terminal_01x02 Generic screw terminal, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/)