# 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:** aaaaaa12132 - **Created:** 2/3/2025 - **Last Updated:** 2/3/2025 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ ## Key Components ### BOOT — [PTS815](https://www.flux.ai/vasy_skral/pts815~6b.md) - Manufacturer Name: C&K - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf - Part Type: Switch - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS **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~x5v.md) - Part Type: Diode - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds30217.pdf - Manufacturer Part Number: 1N5819HW-7-F - Manufacturer Name: Diodes Incorporated - 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~xt.md) - Manufacturer Name: Würth Elektronik - Datasheet URL: https://katalog.we-online.de/pbs/datasheet/82400102.pdf - Part Type: Protection - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 82400102 **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~qf3.md) - Part Type: Integrated Circuit - Datasheet URL: https://datasheet.lcsc.com/szlcsc/Jiangsu-Qin-Heng-CH340C_C84681.pdf - Manufacturer Name: Wah - 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 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~1qc.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~1qc.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] ### LED1 — [WP937AD/EGW](https://www.flux.ai/jecstronic/wp937adegw~hi.md) - Manufacturer Name: Kingbright - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/WP937AD-EGW.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: WP937AD/EGW - Part Type: LED **Pins:** - 1 [pin 1] - 2 [pin 2] ### PS1 — [HLK-5M12](https://www.flux.ai/jecstronic/hlk-5m12~xgg.md) - Manufacturer Name: HI-LINK - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: HLK-5M12 - Datasheet URL: https://datasheet.lcsc.com/lcsc/2102011004_HI-LINK-HLK-5M12_C209908.pdf - Part Type: Power Supply **Pins:** - -VO [pin 3] - +VO [pin 4] - AC_1 [pin 1] - AC_2 [pin 2] ### PWR — [LED-0805-Template-2](https://www.flux.ai/vasy_skral/led-0805-template-2~uu0.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### Q1 — BSS138 - Manufacturer Part Number: BSS138 - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Part Type: Transistor - Manufacturer Name: onsemi **Pins:** - D - G - S ### Q2 — BSS138 - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Manufacturer Name: onsemi - Part Type: Transistor - Manufacturer Part Number: BSS138 **Pins:** - D - G - S ### RST — [PTS815](https://www.flux.ai/vasy_skral/pts815~6b.md) - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf - Manufacturer Name: C&K - Part Type: Switch - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS **Pins:** - ~1 [pin 1] - ~2 [pin 2] - ~3 [pin 3] - ~4 [pin 4] ### SW1 — [Push Button](https://www.flux.ai/jharwinbarrozo/push-button~eqk.md) - Manufacturer Part Number: B3FS-1050P - Manufacturer Name: OMRON - Datasheet URL: https://datasheet.lcsc.com/lcsc/1809271215_Omron-Electronics-B3FS-1050P_C231326.pdf - Part Type: Switch **Pins:** - P1 [pin 1] - P2 [pin 3] ### U1 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33~34.md) - Manufacturer Name: AMS - Manufacturer Part Number: AMS1117-3.3 - Part Type: Integrated Circuit - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811021917_Advanced-Monolithic-Systems-AMS1117_C6188.pdf **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~7ed.md) - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf - Manufacturer Name: Espressif Systems - Manufacturer Part Number: ESP32-WROOM-32E **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 — [RC522 RFID](https://www.flux.ai/jecstronic/rc522-rfid~dc6.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: http://www.handsontec.com/dataspecs/RC522.pdf - Manufacturer Name: Handson Technology - Part Type: Module - Manufacturer Part Number: RC522 **Pins:** - GND [pin 3] - IRQ [pin 4] - MISO/SCL/Tx [pin 5] - MOSI [pin 6] - RST [pin 2] - SCK [pin 7] - SS/SDA/Rx [pin 8] - VCC [pin 1] ### U4 — [NEO-6M-GPS](https://www.flux.ai/adrian95/neo-6m-gps~nsv.md) - Manufacturer Part Number: NEO-6M-GPS - Part Type: Module - Manufacturer Name: U-blox - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.snapeda.com/parts/NEO-6M-GPS/u-blox/datasheet/ **Pins:** - CFG_GPS0/SCK [pin 16] - EXTINT0 [pin 4] - GND [pin 10] - GND [pin 12] - GND [pin 24] - GND [pin 13] - MISO/CFG_COM1 [pin 15] - MOSI/CFG_COM0 [pin 14] - RF_IN [pin 11] - RSVD_17 [pin 17] - RSVD_8 [pin 8] - RXD1 [pin 21] - SCL2 [pin 19] - SDA2 [pin 18] - SS_N [pin 2] - TIMEPULSE [pin 3] - TXD1 [pin 20] - USB_DM [pin 5] - USB_DP [pin 6] - V_BCKP [pin 22] - VCC [pin 23] - VCC_RF [pin 9] - VDDUSB [pin 7] ### U5 — [DHT11](https://www.flux.ai/vasy_skral/dht11~u71.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://cdn-learn.adafruit.com/downloads/pdf/dht.pdf - Manufacturer Part Number: DHT11 - Manufacturer Name: Adafruit Industries LLC - Symbol Style: Parametric - Part Type: Integrated Circuit **Pins:** - GND [pin 4] - IO [pin 2] - NC [pin 3] - VCC [pin 1] ### U6 — [Relay Add-on Module for Seeed Studio XIAO and QT Py](https://www.flux.ai/seeedstudio/relay-add-on-module-for-seeed-studio-xiao-and-qt-py~vk.md) - Manufacturer Part Number: 114993555 - Purchase Url: https://www.seeedstudio.com/Relay-add-on-module-for-XIAO-p-6310.html - Product Info Url: https://wiki.seeedstudio.com/relay_add_on_module_for_xiao/ **Pins:** - 3V3 [pin 12] - 5V [pin 1] - A [pin 15] - B [pin 16] - D0 [pin 1] - D1 [pin 2] - D10 [pin 11] - D2 [pin 3] - D3 [pin 4] - D4 [pin 5] - D5 [pin 6] - D6 [pin 7] - D7 [pin 8] - D8 [pin 9] - D9 [pin 1] - GND [pin 13] ### U7 — [s8550 buzzer_Vertical](https://www.flux.ai/jecstronic/s8550-buzzervertical~zcr.md) - Manufacturer Part Number: S8550 Buzzer Module - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheet.lcsc.com/lcsc/2108142230_IDCHIP-S8550_C2848179.pdf - Manufacturer Name: Kuongshun - Part Type: Module **Pins:** - GND [pin 1] - I/O [pin 2] - VCC [pin 3] ### USB1 — [TYPE-C-31-M-12](https://www.flux.ai/vasy_skral/type-c-31-m-12~75f.md) - Manufacturer Part Number: TYPE-C-31-M-12 - Datasheet URL: https://datasheet.lcsc.com/lcsc/2205251630_Korean-Hroparts-Elec-TYPE-C-31-M-12_C165948.pdf - Part Type: Connector - 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/aaaaaa12132/esp32-wroom-32e-reference-design~x3](https://www.flux.ai/aaaaaa12132/esp32-wroom-32e-reference-design~x3).* --- *Generated from [https://www.flux.ai/aaaaaa12132/esp32-wroom-32e-reference-design~x3](https://www.flux.ai/aaaaaa12132/esp32-wroom-32e-reference-design~x3)*