# ESP32-WROVER-E-N4R8

**Espressif Systems** · WiFi Modules · ESP32-WROVER-E

ESP32-WROVER-E-N4R8 from Espressif Systems, in a ESP32-WROVER-E. 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 | Module power supply, VDD33, specified at 3.0 to 3.6 V (3.3 V typical), with an external supply able to deliver at least 0.5 A. |
| 3 | EN | input | Module-enable signal, active high. |
| 4 | SENSOR_VP | input | GPIO36 with ADC1_CH0 and RTC_GPIO0 functions. |
| 5 | SENSOR_VN | input | GPIO39 with ADC1_CH3 and RTC_GPIO3 functions. |
| 6 | IO34 | input | GPIO34 with ADC1_CH6 and RTC_GPIO4 functions. |
| 7 | IO35 | input | GPIO35 with ADC1_CH7 and RTC_GPIO5 functions. |
| 8 | IO32 | bidirectional | GPIO32 with XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4, TOUCH9 and RTC_GPIO9 functions. |
| 9 | IO33 | bidirectional | GPIO33 with XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5, TOUCH8 and RTC_GPIO8 functions. |
| 10 | IO25 | bidirectional | GPIO25 with DAC_1, ADC2_CH8, RTC_GPIO6 and EMAC_RXD0 functions. |
| 11 | IO26 | bidirectional | GPIO26 with DAC_2, ADC2_CH9, RTC_GPIO7 and EMAC_RXD1 functions. |
| 12 | IO27 | bidirectional | GPIO27 with ADC2_CH7, TOUCH7, RTC_GPIO17 and EMAC_RX_DV functions. |
| 13 | IO14 | bidirectional | GPIO14 with ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK and EMAC_TXD2 functions. |
| 14 | IO12 | bidirectional | GPIO12 with ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2 and EMAC_TXD3 functions; it should be kept low when the module is powered on. |
| 15 | GND | power_in | Ground pin of the module. |
| 16 | IO13 | bidirectional | GPIO13 with ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3 and EMAC_RX_ER functions. |
| 17 | NC | unconnected | Not led out on the module; no connection. |
| 18 | NC | unconnected | Not led out on the module; no connection. |
| 19 | NC | unconnected | Not led out on the module; no connection. |
| 20 | NC | unconnected | Not led out on the module; no connection. |
| 21 | NC | unconnected | Not led out on the module; no connection. |
| 22 | NC | unconnected | Not led out on the module; no connection. |
| 23 | IO15 | bidirectional | GPIO15 with ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD, SD_CMD and EMAC_RXD3 functions. |
| 24 | IO2 | bidirectional | GPIO2 with ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0 and SD_DATA0 functions. |
| 25 | IO0 | bidirectional | GPIO0 with ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1 and EMAC_TX_CLK functions. |
| 26 | IO4 | bidirectional | GPIO4 with ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1 and EMAC_TX_ER functions. |
| 27 | NC | unconnected | No connection on the module. |
| 28 | NC | unconnected | No connection on the module. |
| 29 | IO5 | bidirectional | GPIO5 with VSPICS0, HS1_DATA6 and EMAC_RX_CLK functions. |
| 30 | IO18 | bidirectional | GPIO18 with VSPICLK and HS1_DATA7 functions. |
| 31 | IO19 | bidirectional | GPIO19 with VSPIQ, U0CTS and EMAC_TXD0 functions. |
| 32 | NC | unconnected | No connection on the module. |
| 33 | IO21 | bidirectional | GPIO21 with VSPIHD and EMAC_TX_EN functions. |
| 34 | RXD0 | bidirectional | GPIO3 with U0RXD (UART0 receive) and CLK_OUT2 functions; UART0 is used for firmware download and log output. |
| 35 | TXD0 | bidirectional | GPIO1 with U0TXD (UART0 transmit), CLK_OUT3 and EMAC_RXD2 functions; UART0 is used for firmware download and log output. |
| 36 | IO22 | bidirectional | GPIO22 with VSPIWP, U0RTS and EMAC_TXD1 functions. |
| 37 | IO23 | bidirectional | GPIO23 with VSPID and HS1_STROBE functions. |
| 38 | GND | power_in | Ground pin of the module. |
| 39 | GND | power_in | Exposed ground pad; soldering it to base-board ground is optional but improves thermal performance, and too much solder paste can raise the module gap. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | ESP32-WROVER-E |
| 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 | -0.3 |  | 3.6 | V |  | 29 |
| Storage temperature | Tstore | -40 |  | 105 | °C |  | 29 |
| Power supply voltage | VDD33 | 3 | 3.3 | 3.6 | V |  | 29 |
| Current delivered by external power supply | IV DD | 0.5 |  |  | A |  | 29 |
| Operating temperature | T | -40 |  | 85 | °C |  | 29 |
| High-level input current | IIH |  |  | 50 | nA |  | 29 |
| Low-level input current | IIL |  |  | 50 | nA |  | 29 |
| Low-level input voltage | VIL | -0.3 |  |  | V |  | 29 |
| Low-level input voltage of CHIP_PU to shut down the chip | VIL_nRST |  |  | 0.6 | V |  | 30 |
| Power supply voltage (3.3 V) | VCC | 2.7 | 3.3 | 3.6 | V | Flash | 31 |
| Differential nonlinearity (DNL) | 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 | 27 |
| Integral nonlinearity (INL) | 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 | 27 |
| ADC total error after eFuse Vref calibration |  | -23 |  | 23 | mV | Atten = 0, effective measurement range of 100 ∼ 950 mV | 27 |
| ADC total error after eFuse Vref calibration |  | -30 |  | 30 | mV | Atten = 1, effective measurement range of 100 ∼ 1250 mV | 27 |
| ADC total error after eFuse Vref calibration |  | -40 |  | 40 | mV | Atten = 2, effective measurement range of 150 ∼ 1750 mV | 27 |
| ADC total error after eFuse Vref calibration |  | -60 |  | 60 | mV | Atten = 3, effective measurement range of 150 ∼ 2450 mV | 27 |
| Crystal frequency tolerance |  | -10 |  | 10 | ppm | U1 40 MHz crystal, schematic annotation | 37 |
| Crystal frequency |  |  | 40 |  | MHz | U1 crystal oscillator, schematic annotation | 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 16: Reflow Profile | 47 |

## CAD (KiCad official)

- Symbol: `ESP32-WROVER-E-N4R8`
- Footprint: `PCM_Espressif:ESP32-WROVER-E`
- 3D model: ESP32-WROVER-E (KiCad packages3D, STEP)
- 3D model files: `esp32-wrover-e-n4r8-etched.step` / `esp32-wrover-e-n4r8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esp32-wrover-e-n4r8.step` / `esp32-wrover-e-n4r8.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Espressif Systems datasheet](https://www.espressif.com/sites/default/files/documentation/esp32-wrover-e_esp32-wrover-ie_datasheet_en.pdf) (53 pp, sha256 `611e8506f352225e`, 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](docs/esp32-wrover-e-n4r8-datasheet.pdf)