# ESP32-S2-MINI-2 Reference Design ## Description This project is a reference design for an ESP32-S2-MINI-2 based device. It features USB-C for power and data transfer, onboard voltage regulation, and multiple peripheral connections. It also includes a CH340C for USB to serial conversion #referenceDesign #project #ESP32 #ESP32S2 #RF #WIFI #MCU #referenceDesign #simple-embedded #espressif #template ## Project Details - **Owner:** srproyectisgood - **Created:** 2/3/2024 - **Last Updated:** 2/13/2026 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ ## Key Components ### ESP1 — [ESP32-S2-MINI-2](https://www.flux.ai/vasy_skral/esp32-s2-mini-2~4ir.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ESP32-S2-MINI-2 - Part Type: Integrated Circuit - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-s2-mini-2_esp32-s2-mini-2u_datasheet_en.pdf - Manufacturer Name: Espressif Systems **Pins:** - <-GND [pin 30] - 3V3 [pin 3] - EN [pin 45] - GND [pin 52] - GND [pin 61_4] - GND [pin 61_3] - GND [pin 49] - GND [pin 53] - GND [pin 61_5] - GND [pin 59] - GND [pin 65] - GND [pin 61_2] - GND [pin 1] - GND [pin 60] - GND [pin 61_8] - GND [pin 2] - GND [pin 46] - GND [pin 42] - GND [pin 58] - GND [pin 57] - GND [pin 61_6] - GND [pin 48] - GND [pin 63] - GND [pin 43] - GND [pin 54] - GND [pin 47] - GND [pin 61] - GND [pin 62] - GND [pin 50] - GND [pin 64] - GND [pin 55] - GND [pin 51] - GND [pin 56] - GND [pin 61_7] - GND [pin 61_1] - IO0 [pin 4] - IO1 [pin 5] - IO10 [pin 14] - IO11 [pin 15] - IO12 [pin 16] - IO13 [pin 17] - IO14 [pin 18] - IO15 [pin 19] - IO16 [pin 20] - IO17 [pin 21] - IO18 [pin 22] - IO19 [pin 23] - IO2 [pin 6] - IO20 [pin 24] - IO21 [pin 25] - IO26 [pin 26] - IO3 [pin 7] - IO33 [pin 28] - IO34 [pin 29] - IO35 [pin 31] - IO36 [pin 32] - IO37 [pin 33] - IO38 [pin 34] - IO39 [pin 35] - IO4 [pin 8] - IO40 [pin 36] - IO41 [pin 37] - IO42 [pin 38] - IO45 [pin 41] - IO46 [pin 44] - IO5 [pin 9] - IO6 [pin 10] - IO7 [pin 11] - IO8 [pin 12] - IO9 [pin 13] - NC [pin 27] - RXD0 [pin 40] - TXD0 [pin 39] ### J2 — [Pin Socket 01x20 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x20-254mm-vertical~p89.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_11 [pin 11] - Pin_12 [pin 12] - Pin_13 [pin 13] - Pin_14 [pin 14] - Pin_15 [pin 15] - Pin_16 [pin 16] - Pin_17 [pin 17] - Pin_18 [pin 18] - Pin_19 [pin 19] - Pin_2 [pin 2] - Pin_20 [pin 20] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### J3 — [Pin Socket 01x20 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x20-254mm-vertical~p89.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_11 [pin 11] - Pin_12 [pin 12] - Pin_13 [pin 13] - Pin_14 [pin 14] - Pin_15 [pin 15] - Pin_16 [pin 16] - Pin_17 [pin 17] - Pin_18 [pin 18] - Pin_19 [pin 19] - Pin_2 [pin 2] - Pin_20 [pin 20] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### K1 — [G3MB-202PDC5](https://www.flux.ai/adrian95/g3mb-202pdc5~t5x.md) - Manufacturer Part Number: G3MB-202PDC5 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Relay - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Omron%20PDFs/G3MB.pdf - Manufacturer Name: Omron Automation and Safety **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### U2 — [ZMPT101B](https://www.flux.ai/vasyl/zmpt101b~7ep.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810010218_ZHE-MING-LANG-XI-ZMPT101B_C111858.pdf - Manufacturer Part Number: ZMPT101B - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: ZHE MING LANG XI - Part Type: Current Transformers **Pins:** - ~ [pin 4] - ~ [pin 3] - ~ [pin 2] - ~ [pin 1] ### U3 — [APDS-9960](https://www.flux.ai/jecstronic/apds-9960~78u.md) - Datasheet URL: https://www.snapeda.com/parts/APDS-9960/Broadcom%20Limited/datasheet/ - Part Type: Integrated Circuit - Manufacturer Part Number: APDS-9960 - Manufacturer Name: Broadcom **Pins:** - GND - INT - LDR - LEDA - LEDK - SCL - SDA - VDD ### U4 — [4682](https://www.flux.ai/jecstronic/4682~7ep.md) - Manufacturer Name: Adafruit Industries LLC - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 4682 - Datasheet URL: https://cdn-learn.adafruit.com/downloads/pdf/adafruit-microsd-spi-sdio.pdf - Part Type: Module **Pins:** - 3V [pin 1] - CLK [pin 3] - CMD/SI [pin 5] - D1 [pin 7] - D3/CS [pin 6] - DAT2 [pin 8] - DET [pin 9] - DO/SO [pin 4] - GND [pin 2] ### U5 — [ESP32-S3-MINI-1-N8](https://www.flux.ai/jecstronic/esp32-s3-mini-1-n8~m3d.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ESP32-S3-MINI-1-N8 - Manufacturer Name: Espressif Systems - Part Type: Module - Datasheet URL: https://www.mouser.com/datasheet/2/891/esp32_s3_mini_1_mini_1u_datasheet_en-2997643.pdf **Pins:** - 3V3 [pin 3] - EN [pin 45] - GND [pin 61_1] - GND [pin 46] - GND [pin 1] - GND [pin 62] - GND [pin 54] - GND [pin 43] - GND [pin 61_3] - GND [pin 61_5] - GND [pin 58] - GND [pin 61] - GND [pin 61_6] - GND [pin 59] - GND [pin 63] - GND [pin 42] - GND [pin 61_8] - GND [pin 61_4] - GND [pin 57] - GND [pin 61_7] - GND [pin 64] - GND [pin 50] - GND [pin 56] - GND [pin 61_2] - GND [pin 60] - GND [pin 47] - GND [pin 48] - GND [pin 52] - GND [pin 2] - GND [pin 65] - GND [pin 53] - GND [pin 51] - GND [pin 49] - GND [pin 55] - IO0 [pin 4] - IO1 [pin 5] - IO10 [pin 14] - IO11 [pin 15] - IO12 [pin 16] - IO13 [pin 17] - IO14 [pin 18] - IO15 [pin 19] - IO16 [pin 20] - IO17 [pin 21] - IO18 [pin 22] - IO19 [pin 23] - IO2 [pin 6] - IO20 [pin 24] - IO21 [pin 25] - IO26 [pin 26] - IO3 [pin 7] - IO33 [pin 28] - IO34 [pin 29] - IO35 [pin 31] - IO36 [pin 32] - IO37 [pin 33] - IO38 [pin 34] - IO39 [pin 35] - IO4 [pin 8] - IO40 [pin 36] - IO41 [pin 37] - IO42 [pin 38] - IO45 [pin 41] - IO46 [pin 44] - IO47 [pin 27] - IO48 [pin 30] - IO5 [pin 9] - IO6 [pin 10] - IO7 [pin 11] - IO8 [pin 12] - IO9 [pin 13] - RXD0 [pin 40] - TXD0 [pin 39] ### U6 — [G3VM-352C](https://www.flux.ai/lcsc/g3vm-352c~8kfd.md) - LCSC Part Number: C1558926 - JLCPCB Part Class: Extended Part - Manufacturer Name: OMRON(欧姆龙) - Part Type: Solid State Relays - MOS Output (PhotoMOS) - Manufacturer Part Number: G3VM-352C - Package or Case Code: DIP-8_L9.7-W6.4-P2.54-LS7.6-BL **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] ### U7 — [G3VM-352C](https://www.flux.ai/lcsc/g3vm-352c~8kfd.md) - Manufacturer Name: OMRON(欧姆龙) - Part Type: Solid State Relays - MOS Output (PhotoMOS) - LCSC Part Number: C1558926 - JLCPCB Part Class: Extended Part - Manufacturer Part Number: G3VM-352C - Package or Case Code: DIP-8_L9.7-W6.4-P2.54-LS7.6-BL **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/srproyectisgood/esp32-s2-mini-2-reference-design~dl](https://www.flux.ai/srproyectisgood/esp32-s2-mini-2-reference-design~dl).* --- *Generated from [https://www.flux.ai/srproyectisgood/esp32-s2-mini-2-reference-design~dl](https://www.flux.ai/srproyectisgood/esp32-s2-mini-2-reference-design~dl)*