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ESP32-WROOM-32E-N4

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Espressif Systems WiFi Modules, ESP32-WROOM-32E. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ESP32-WROOM-32E-N4

Espressif Systems · WiFi Modules · ESP32-WROOM-32E

ESP32-WROOM-32E-N4 from Espressif Systems, in a ESP32-WROOM-32E. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground pin of the module.
2 3V3 power_in Power supply input; recommended VDD33 is 3.0-3.6 V (3.3 V typical) with at least 0.5 A delivered by the external supply (Table 14, page 28).
3 EN input Chip enable: high enables the chip, low shuts it down, and the pin must not be left floating.
4 SENSOR_VP input GPIO36, ADC1_CH0 and RTC_GPIO0 input.
5 SENSOR_VN input GPIO39, ADC1_CH3 and RTC_GPIO3 input.
6 IO34 input GPIO34, ADC1_CH6 and RTC_GPIO4 input.
7 IO35 input GPIO35, ADC1_CH7 and RTC_GPIO5 input.
8 IO32 bidirectional GPIO32, also 32.768 kHz crystal oscillator input (XTAL_32K_P), ADC1_CH4, TOUCH9 and RTC_GPIO9.
9 IO33 bidirectional GPIO33, also 32.768 kHz crystal oscillator output (XTAL_32K_N), ADC1_CH5, TOUCH8 and RTC_GPIO8.
10 IO25 bidirectional GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6 and EMAC_RXD0.
11 IO26 bidirectional GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7 and EMAC_RXD1.
12 IO27 bidirectional GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17 and EMAC_RX_DV.
13 IO14 bidirectional GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK and EMAC_TXD2.
14 IO12 bidirectional GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2 and EMAC_TXD3; it should be kept low when the module is powered on.
15 GND power_in Ground pin of the module.
16 IO13 bidirectional GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3 and EMAC_RX_ER.
17 NC unconnected Not connected; the datasheet table refers to note 2 (GPIO6-GPIO11 are tied to the in-package flash and not led out).
18 NC unconnected Not connected; the datasheet table refers to note 2 (GPIO6-GPIO11 are tied to the in-package flash and not led out).
19 NC unconnected Not connected; the datasheet table refers to note 2 (GPIO6-GPIO11 are tied to the in-package flash and not led out).
20 NC unconnected Not connected; the datasheet table refers to note 2 (GPIO6-GPIO11 are tied to the in-package flash and not led out).
21 NC unconnected Not connected; the datasheet table refers to note 2 (GPIO6-GPIO11 are tied to the in-package flash and not led out).
22 NC unconnected Not connected; the datasheet table refers to note 2 (GPIO6-GPIO11 are tied to the in-package flash and not led out).
23 IO15 bidirectional GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD, SD_CMD and EMAC_RXD3; MTDO is a strapping pin that controls U0TXD printing.
24 IO2 bidirectional GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0 and SD_DATA0; it is a boot-mode strapping pin (default pull-down).
25 IO0 bidirectional GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1 and EMAC_TX_CLK; it is a boot-mode strapping pin (default pull-up).
26 IO4 bidirectional GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1 and EMAC_TX_ER.
27 IO16 bidirectional GPIO16, HS1_DATA4, U2RXD and EMAC_CLK_OUT; in variants with embedded QSPI PSRAM it is connected to the PSRAM and cannot be used for other functions.
28 IO17 bidirectional GPIO17, HS1_DATA5, U2TXD and EMAC_CLK_OUT_180.
29 IO5 bidirectional GPIO5, VSPICS0, HS1_DATA6 and EMAC_RX_CLK; it is a strapping pin used for SDIO slave timing (default pull-up).
30 IO18 bidirectional GPIO18, VSPICLK and HS1_DATA7.
31 IO19 bidirectional GPIO19, VSPIQ, U0CTS and EMAC_TXD0.
32 NC unconnected Not connected; no function is listed for this pin.
33 IO21 bidirectional GPIO21, VSPIHD and EMAC_TX_EN.
34 RXD0 bidirectional GPIO3, U0RXD and CLK_OUT2; UART0 receive, used for firmware download and log output.
35 TXD0 bidirectional GPIO1, U0TXD, CLK_OUT3 and EMAC_RXD2; UART0 transmit, used for firmware download and log output.
36 IO22 bidirectional GPIO22, VSPIWP, U0RTS and EMAC_TXD1.
37 IO23 bidirectional GPIO23, VSPID and HS1_STROBE.
38 GND power_in Ground pin of the module.
39 GND power_in Exposed ground pad (EPAD) on the module bottom; soldering it to base-board ground is optional and improves thermal performance.

Key specifications

Parameter Value
Manufacturer Espressif Systems
Package ESP32-WROOM-32E
Category IoT/Communication Modules
Pins 39

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Power supply voltage VDD33 3 3.3 3.6 V 28
Current delivered by external power supply IVDD 0.5 A 28
Operating ambient temperature T -40 85 °C 85 °C version 28
Power supply voltage VDD33 -0.3 3.6 V 28
Storage temperature TSTORE -40 105 °C 28
High-level input current IIH 50 nA 28
Low-level input current IIL 50 nA 28
Differential nonlinearity DNL -7 7 LSB RTC controller; ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi&Bluetooth off 25
Integral nonlinearity INL -12 12 LSB RTC controller; ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi&Bluetooth off 25
Total error -23 23 mV Atten = 0, effective measurement range of 100 ∼ 950 mV 26
Total error -30 30 mV Atten = 1, effective measurement range of 100 ∼ 1250 mV 26
Total error -40 40 mV Atten = 2, effective measurement range of 150 ∼ 1750 mV 26
Total error -60 60 mV Atten = 3, effective measurement range of 150 ∼ 2450 mV 26
Power supply voltage (3.3 V) VCC 2.7 3.3 3.6 V Flash, 3.3 V supply 30
Maximum clock frequency FC 80 MHz Flash 30
Crystal oscillator frequency tolerance -10 10 ppm 40 MHz crystal 37

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin Solder, Sn-Ag-Cu (SAC305) lead-free solder alloy Figure 15: Reflow Profile 46

CAD (KiCad official)

  • Symbol: ESP32-WROOM-32E-N4
  • Footprint: PCM_Espressif:ESP32-WROOM-32E
  • 3D model: ESP32-WROOM-32E (KiCad packages3D, STEP)
  • 3D model files: esp32-wroom-32e-n4-etched.step / esp32-wroom-32e-n4-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esp32-wroom-32e-n4.step / esp32-wroom-32e-n4.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Espressif Systems datasheet (52 pp, sha256 4c7a345d1c1bfec3, retrieved 2026-10-28, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF