# 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:** kiransekar - **Created:** 12/7/2024 - **Last Updated:** 5/27/2025 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ ## Key Components ### BOOT — [PTS815](https://www.flux.ai/vasy_skral/pts815.md) - Part Type: Switch - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf - Manufacturer Name: C&K **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) - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds30217.pdf - Manufacturer Name: Diodes Incorporated - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - Manufacturer Part Number: 1N5819HW-7-F **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 - Datasheet URL: https://katalog.we-online.de/pbs/datasheet/82400102.pdf - Manufacturer Part Number: 82400102 - 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) - Part Type: Integrated Circuit - Manufacturer Part Number: CH340C - Manufacturer Name: Wah - Datasheet URL: https://datasheet.lcsc.com/szlcsc/Jiangsu-Qin-Heng-CH340C_C84681.pdf **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] ### LED1 — [WS2812B-B](https://www.flux.ai/vasyl/ws2812b-b.md) - Part Type: LED - Manufacturer Name: Worldsemi - Manufacturer Part Number: WS2812B-B - Datasheet URL: https://datasheet.lcsc.com/lcsc/2006151006_Worldsemi-WS2812B-B_C114586.pdf **Pins:** - DIN [pin 4] - DOUT [pin 2] - VDD [pin 1] - VSS [pin 3] ### 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 Part Number: BSS138 - Manufacturer Name: onsemi - 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 ### RST — [PTS815](https://www.flux.ai/vasy_skral/pts815.md) - Part Type: Switch - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS - Manufacturer Name: C&K - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf **Pins:** - ~1 [pin 1] - ~2 [pin 2] - ~3 [pin 3] - ~4 [pin 4] ### SW1 — [EC11E09244BS](https://www.flux.ai/jecstronic/ec11e09244bs.md) - Manufacturer Name: Alps Alpine - Part Type: Rotary Encoder - Datasheet URL: https://www.mouser.com/datasheet/2/15/alps_alps-s-a0008379064-1-1733314.pdf - Manufacturer Part Number: EC11E09244BS - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - CCW [pin B1] - COM [pin D1] - CW [pin A1] - MH1 [pin MH1] - MH2 [pin MH2] - NO [pin E1] - WIPER [pin C1] ### SW2 — [Tactile Switch SPST-NO PTS526 SK15 SMTR2 LFS](https://www.flux.ai/collinsemasi/tactile-switch-spst-no-pts526-sk15-smtr2-lfs.md) - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/2780/pts526.pdf - Manufacturer Name: C&K - Manufacturer Part Number: PTS526 SK15 SMTR2 LFS **Pins:** - 4 [pin 4] - 2 [pin 2] - 1 [pin 1] - 3 [pin 3] ### SW3 — [Tactile Switch SPST-NO PTS526 SK15 SMTR2 LFS](https://www.flux.ai/collinsemasi/tactile-switch-spst-no-pts526-sk15-smtr2-lfs.md) - Datasheet URL: https://www.ckswitches.com/media/2780/pts526.pdf - Part Type: Switch - Manufacturer Name: C&K - Manufacturer Part Number: PTS526 SK15 SMTR2 LFS **Pins:** - 4 [pin 4] - 2 [pin 2] - 1 [pin 1] - 3 [pin 3] ### U1 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33.md) - Symbol Style: Parametric - Manufacturer Name: AMS - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811021917_Advanced-Monolithic-Systems-AMS1117_C6188.pdf - Manufacturer Part Number: AMS1117-3.3 - 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) - Part Type: Integrated Circuit - Manufacturer Name: Espressif Systems - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf - Manufacturer Part Number: ESP32-WROOM-32E - License: https://creativecommons.org/licenses/by/4.0/ **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 — [BQ24075RGTT](https://www.flux.ai/jecstronic/bq24075rgtt.md) - Manufacturer Part Number: BQ24075RGTT - Part Type: Power Management - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq24075.pdf - Manufacturer Name: Texas Instruments **Pins:** - ~CE [pin 4] - ~CHG [pin 9] - ~PGOOD [pin 7] - BAT_1 [pin 2] - BAT_2 [pin 3] - EN1 [pin 6] - EN2 [pin 5] - ILIM [pin 12] - IN [pin 13] - ISET [pin 16] - OUT_1 [pin 10] - OUT_2 [pin 11] - SYSOFF [pin 15] - TMR [pin 14] - TS [pin 1] - VSS [pin 8] - VSS_THERMAL_PAD [pin 17] ### U4 — [AP2112K-3.3TRG1](https://www.flux.ai/vasyl/ap2112k-33trg1.md) - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP2112.pdf - Manufacturer Part Number: AP2112K-3.3TRG1 - Manufacturer Name: Diodes Incorporated - Part Type: Integrated Circuit **Pins:** - EN [pin 3] - GND [pin 2] - VIN [pin 1] - VOUT [pin 5] ### U5 — [DS18B20+](https://www.flux.ai/adrian95/ds18b20plus.md) - Manufacturer Part Number: DS18B20+ - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Sensor - Manufacturer Name: Analog Devices Inc./Maxim Integrated - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/ds18b20.pdf **Pins:** - DQ [pin 2] - GND [pin 1] - VDD [pin 3] ### U6 — [BME280](https://www.flux.ai/vasy_skral/bme280.md) - Datasheet URL: https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bme280-ds002.pdf - Manufacturer Name: Bosch Sensortec - Part Type: Integrated Circuit - Manufacturer Part Number: BME280 - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: Parametric **Pins:** - CSB [pin 2] - GND [pin 7] - GND [pin 1] - SCK [pin 4] - SDI [pin 3] - SDO [pin 5] - VDD [pin 8] - VDDIO [pin 6] ### U7 — [VL53L0CXV0DH](https://www.flux.ai/vasy_skral/vl53l0cxv0dh.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Sensor - Manufacturer Name: STMicroelectronics - Manufacturer Part Number: VL53L0CXV0DH/1 - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/group3/b2/1e/33/77/c6/92/47/6b/DM00279086/files/DM00279086.pdf/jcr:content/translations/en.DM00279086.pdf **Pins:** - AVDD [pin 11] - AVDDVCSEL [pin 1.1] - AVDDVCSEL [pin 1] - AVSSVCSEL [pin 2] - GND [pin 3] - GND [pin 12] - GND [pin 6] - GND [pin 4] - GPIO1 [pin 7] - SCL [pin 10] - SDA [pin 9] - XSHUT [pin 5] ### U8 — [L298N](https://www.flux.ai/vasy_skral/l298n.md) - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: STMicroelectronics - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/82/cc/3f/39/0a/29/4d/f0/CD00000240.pdf/files/CD00000240.pdf/jcr:content/translations/en.CD00000240.pdf - Manufacturer Part Number: L298N - Symbol Style: Parametric **Pins:** - ENA [pin 6] - ENB [pin 11] - GND [pin 8] - IN1 [pin 5] - IN2 [pin 7] - IN3 [pin 10] - IN4 [pin 12] - OUT1 [pin 2] - OUT2 [pin 3] - OUT3 [pin 13] - OUT4 [pin 14] - SENSE_A [pin 1] - SENSE_B [pin 15] - VS [pin 4] - VSS [pin 9] ### USB1 — [TYPE-C-31-M-12](https://www.flux.ai/vasy_skral/type-c-31-m-12.md) - Manufacturer Part Number: TYPE-C-31-M-12 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheet.lcsc.com/lcsc/2205251630_Korean-Hroparts-Elec-TYPE-C-31-M-12_C165948.pdf - Manufacturer Name: Korean Hroparts Elec - Part Type: Connector - Symbol Style: Parametric **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 B4A9] - VBUS [pin A4B9] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/kiransekar/esp32-wroom-32e-reference-design](https://www.flux.ai/kiransekar/esp32-wroom-32e-reference-design).* --- *Generated from [https://www.flux.ai/kiransekar/esp32-wroom-32e-reference-design](https://www.flux.ai/kiransekar/esp32-wroom-32e-reference-design)*