# ESP32-WROOM-32E Reference Design ## Description This project is a reference design for an ESP32-WROOM-32E 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 #ESP32WROOM #RF #WIFI #MCU #simpleEmbedded #espressif #template ## Project Details - **Owner:** eli7 - **Created:** 7/25/2025 - **Last Updated:** 7/27/2025 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ ## Key Components ### BOOT — [PTS815](https://www.flux.ai/vasy_skral/pts815.md) - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS - Manufacturer Name: C&K - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf **Pins:** - ~1 [pin 1] - ~2 [pin 2] - ~3 [pin 3] - ~4 [pin 4] ### D1 — [1N5819HW-7-F](https://www.flux.ai/jecstronic/1n5819hw-7-f.md) - Part Type: Diode - Manufacturer Name: Diodes Incorporated - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds30217.pdf - Manufacturer Part Number: 1N5819HW-7-F - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### D2 — [WE-TVS-82400102](https://www.flux.ai/vasy_skral/we-tvs-82400102.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Würth Elektronik - Manufacturer Part Number: 82400102 - Datasheet URL: https://katalog.we-online.de/pbs/datasheet/82400102.pdf - Part Type: Protection **Pins:** - GND [pin 2] - IO1 [pin 6] - IO1 [pin 1] - IO2 [pin 4] - IO2 [pin 3] - VDD [pin 5] ### IC1 — [CH340C](https://www.flux.ai/vasyl/ch340c.md) - Datasheet URL: https://datasheet.lcsc.com/szlcsc/Jiangsu-Qin-Heng-CH340C_C84681.pdf - Manufacturer Part Number: CH340C - Manufacturer Name: Wah - Part Type: Integrated Circuit **Pins:** - ~CTS [pin 9] - ~DCD [pin 12] - ~DSR [pin 10] - ~DTR [pin 13] - ~RI [pin 11] - ~RTS [pin 14] - GND [pin 1] - NC [pin 7] - NC [pin 8] - R232 [pin 15] - RXD [pin 3] - TXD [pin 2] - UD- [pin 6] - UD+ [pin 5] - V3 [pin 4] - VCC [pin 16] ### J1 — [Pin Header 01x16 2.54mm Vertical](https://www.flux.ai/vasy_skral/pin-header-01x16-2p54mm-vertical.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_2 [pin 2] - 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] ### J2 — [Pin Header 01x16 2.54mm Vertical](https://www.flux.ai/vasy_skral/pin-header-01x16-2p54mm-vertical.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **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_2 [pin 2] - 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] ### PWR — [LED-0805-Template-2](https://www.flux.ai/vasy_skral/led-0805-template-2.md) - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### Q1 — BSS138 - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Manufacturer Name: onsemi - Manufacturer Part Number: BSS138 - Part Type: Transistor **Pins:** - D - G - S ### Q2 — BSS138 - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Manufacturer Part Number: BSS138 - Manufacturer Name: onsemi - Part Type: Transistor **Pins:** - D - G - S ### Q3 — [FS8205A](https://www.flux.ai/lcsc/fs8205a.md) - JLCPCB Part Class: Extended Part - LCSC Part Number: C2830320 - Manufacturer Part Number: FS8205A - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR - Manufacturer Name: TECH PUBLIC(台舟) - Part Type: MOSFETs **Pins:** - D1/D2 [pin 5] - D1/D2 [pin 2] - G1 [pin 6] - G2 [pin 4] - S1 [pin 1] - S2 [pin 3] ### RST — [PTS815](https://www.flux.ai/vasy_skral/pts815.md) - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS - Manufacturer Name: C&K **Pins:** - ~1 [pin 1] - ~2 [pin 2] - ~3 [pin 3] - ~4 [pin 4] ### SW1 — [Slide Switch SW_SPDT](https://www.flux.ai/404src/slide-switch-swspdt.md) - Manufacturer Name: Wealth Metal - Purchase Url: https://www.taydaelectronics.com/slide-switch-1p2t-through-hole-0-5a-50vdc.html - Manufacturer Part Number: SS12F44G5 - Datasheet URL: https://www.taydaelectronics.com/datasheets/A-5111.pdf **Pins:** - A [pin 1] - B [pin 2] - C [pin 3] ### U1 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811021917_Advanced-Monolithic-Systems-AMS1117_C6188.pdf - Manufacturer Part Number: AMS1117-3.3 - Manufacturer Name: AMS - Part Type: Integrated Circuit **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] ### U2 — [ESP32-WROOM-32E](https://www.flux.ai/vasy_skral/esp32-wroom-32e.md) - Manufacturer Part Number: ESP32-WROOM-32E - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Espressif Systems - Part Type: Integrated Circuit - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf **Pins:** - GND=> . [pin 15] - EN [pin 3] - GND [pin 38] - GND [pin 39] - GND [pin 1] - IO0 [pin 25] - IO12 [pin 14] - IO13 [pin 16] - IO14 [pin 13] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 10] - IO26 [pin 11] - IO27 [pin 12] - IO32 [pin 8] - IO33 [pin 9] - IO34 [pin 6] - IO35 [pin 7] - IO4 [pin 26] - IO5 [pin 29] - NC [pin 18] - NC [pin 19] - NC [pin 17] - NC [pin 21] - NC [pin 22] - NC [pin 32] - NC [pin 20] - RXD0/IO3 [pin 34] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - TXD0/IO1 [pin 35] - VDD [pin 2] ### U3 — [TPS63020QDSJTQ1](https://www.flux.ai/lcsc/tps63020qdsjtq1.md) - JLCPCB Part Class: Extended Part - Manufacturer Name: TI(德州仪器) - Package or Case Code: VSON-14_L4.0-W3.0-P0.50-BL-EP_TI_DSJ - LCSC Part Number: C2071810 - Manufacturer Part Number: TPS63020QDSJTQ1 - Part Type: DC-DC Converters **Pins:** - EN [pin 12] - FB [pin 3] - GND [pin 2] - L1 [pin 9] - L1 [pin 8] - L2 [pin 7] - L2 [pin 6] - PG [pin 14] - PGND [pin 15] - PS/SYNC [pin 13] - VIN [pin 10] - VIN [pin 11] - VINA [pin 1] - VOUT [pin 5] - VOUT [pin 4] ### U4 — [CH340C](https://www.flux.ai/vasy_skral/ch340c.md) - Datasheet URL: https://datasheet.lcsc.com/szlcsc/Jiangsu-Qin-Heng-CH340C_C84681.pdf - Manufacturer Name: Wah - Part Type: Integrated Circuit - Manufacturer Part Number: CH340C **Pins:** - ~CTS [pin 9] - ~DCD [pin 12] - ~DSR [pin 10] - ~DTR [pin 13] - ~RI [pin 11] - ~RTS [pin 14] - GND [pin 1] - NC [pin 8] - NC [pin 7] - R232 [pin 15] - RXD [pin 3] - TXD [pin 2] - UD- [pin 6] - UD+ [pin 5] - V3 [pin 4] - VCC [pin 16] ### U5 — [MAX98357AETE+T](https://www.flux.ai/adrian95/max98357aeteplust.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/max98357a-max98357b.pdf - Manufacturer Name: Analog Devices Inc./Maxim Integrated - Part Type: Integrated Circuit - Manufacturer Part Number: MAX98357AETE+T **Pins:** - ~SD_MODE [pin 4] - BCLK [pin 16] - DIN [pin 1] - GAIN_SLOT [pin 2] - GND_1 [pin 3] - GND_2 [pin 11] - GND_3 [pin 15] - LRCLK [pin 14] - N.C._1 [pin 5] - N.C._2 [pin 6] - N.C._3 [pin 12] - N.C._4 [pin 13] - OUTN [pin 10] - OUTP [pin 9] - THERMAL_PAD [pin 17] - VDD_1 [pin 7] - VDD_2 [pin 8] ### U6 — [INMP441 MEMS](https://www.flux.ai/adrian95/inmp441-mems.md) - Manufacturer Name: InvenSense - Manufacturer Part Number: INMP441 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://invensense.tdk.com/wp-content/uploads/2015/02/INMP441.pdf - Part Type: Module **Pins:** - GND [pin 6] - L/R [pin 3] - SCK [pin 1] - SD [pin 4] - VCC [pin 5] - WS [pin 2] ### U7 — [DW01A](https://www.flux.ai/kicad-part-library/dw01a.md) - Package or Case Code: SOT-23-6 - Datasheet URL: https://hmsemi.com/downfile/DW01A.PDF - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: DW01A **Pins:** - CS [pin 2] - GND [pin 6] - OC [pin 3] - OD [pin 1] - TD [pin 4] - VCC [pin 5] ### USB1 — [TYPE-C-31-M-12](https://www.flux.ai/vasy_skral/type-c-31-m-12.md) - Part Type: Connector - Datasheet URL: https://datasheet.lcsc.com/lcsc/2205251630_Korean-Hroparts-Elec-TYPE-C-31-M-12_C165948.pdf - Manufacturer Part Number: TYPE-C-31-M-12 - Manufacturer Name: Korean Hroparts Elec **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin B1A12] - GND [pin A1B12] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD [pin S3] - SHIELD [pin S1] - SHIELD [pin S4] - SHIELD [pin S2] - VBUS [pin A4B9] - VBUS [pin B4A9] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/eli7/esp32-wroom-32e-reference-design](https://www.flux.ai/eli7/esp32-wroom-32e-reference-design).* --- *Generated from [https://www.flux.ai/eli7/esp32-wroom-32e-reference-design](https://www.flux.ai/eli7/esp32-wroom-32e-reference-design)*