ESP32-WROVER-E

module
Espressif Systems Datasheet ↗

ESP32-WROVER-E and ESP32-WROVER-IE pair the dual-core 240 MHz ESP32-D0WD-V3 SoC with 4/8/16 MB of 3.3 V Quad SPI flash AND 8 MB (64 Mbit) of 3.3 V SPI PSRAM in an 18.0×31.4 mm 1.27 mm-pitch castellated footprint. Unlike WROOM-32E, Pins 17–22 (flash bus) AND Pins 27–28 (GPIO16/GPIO17 used internally for PSRAM CS#/CLK) are disconnected (NC) at the module edge, leaving 24 clean external GPIOs.

Silicon IC: ESP32 Boards / Modules: ESP32-MINI-1 ESP32-WROOM-32E Also known as: ESP32-WROVER-IE ESP32-WROVER-E-N4R8 ESP32-WROVER-E-N8R8 ESP32-WROVER-E-N16R8
ESPRESSIF ESP32-WROVER-E 1 GND GND GND 2 3V3 ! 3V3 3V3 3 EN ! CHIP_PU CHIP_PU 4 SENSOR_VP ! GPIO36 ADC1_CH0 GPIO36 ADC1_CH0 5 SENSOR_VN ! GPIO39 ADC1_CH3 GPIO39 ADC1_CH3 6 IO34 ! GPIO34 ADC1_CH6 GPIO34 ADC1_CH6 7 IO35 ! GPIO35 ADC1_CH7 GPIO35 ADC1_CH7 8 IO32 GPIO32 ADC1_CH4 System Clock +2 GPIO32 ADC1_CH4 TOUCH9 XTAL_32K_P 9 IO33 GPIO33 ADC1_CH5 System Clock +2 GPIO33 ADC1_CH5 TOUCH8 XTAL_32K_N 10 IO25 ! GPIO25 ADC2_CH8 DAC_1 GPIO25 ADC2_CH8 DAC_1 11 IO26 ! GPIO26 ADC2_CH9 DAC_2 GPIO26 ADC2_CH9 DAC_2 12 IO27 ! GPIO27 ADC2_CH7 TOUCH7 GPIO27 ADC2_CH7 TOUCH7 13 IO14 ! GPIO14 HSPICLK ADC System Debug +3 GPIO14 ADC2_CH6 TOUCH6 HSPICLK MTMS 14 IO12 ! GPIO12 HSPIQ ADC System Debug +3 GPIO12 ADC2_CH5 TOUCH5 HSPIQ MTDI 15 GND GND GND 16 IO13 ! GPIO13 HSPID ADC System Debug +3 GPIO13 ADC2_CH4 TOUCH4 HSPID MTCK 17 NC 18 NC 19 NC 20 NC 21 NC 22 NC 23 IO15 ! GPIO15 HSPICS0 ADC System Debug +3 GPIO15 ADC2_CH3 TOUCH3 HSPICS0 MTDO 24 IO2 ! GPIO2 ADC2_CH2 TOUCH2 GPIO2 ADC2_CH2 TOUCH2 25 IO0 ! GPIO0 ADC2_CH1 TOUCH1 GPIO0 ADC2_CH1 TOUCH1 26 IO4 ! GPIO4 ADC2_CH0 TOUCH0 GPIO4 ADC2_CH0 TOUCH0 27 NC 28 NC 29 IO5 ! GPIO5 VSPICS0 GPIO5 VSPICS0 30 IO18 GPIO18 VSPICLK GPIO18 VSPICLK 31 IO19 GPIO19 VSPIQ U0CTS GPIO19 VSPIQ U0CTS 32 NC 33 IO21 GPIO21 I2C0_SDA GPIO21 I2C0_SDA 34 RXD0 ! GPIO3 U0RXD GPIO3 U0RXD 35 TXD0 ! GPIO1 U0TXD GPIO1 U0TXD 36 IO22 GPIO22 I2C0_SCL U0RTS GPIO22 I2C0_SCL U0RTS 37 IO23 GPIO23 VSPID GPIO23 VSPID 38 GND GND GND 39 EPAD GND GND

Onboard Peripherals & Internal Signals

Internal 8 MB 3.3V SPI PSRAM QSPI
Chip Pad: GPIO16
Connected internally to GPIO16 (CS#) and GPIO17 (CLK) plus SPI flash data lines

Pins 27 and 28 are disconnected (NC) on the module edge.

Internal Quad SPI Flash (4 / 8 / 16 MB) QSPI
Chip Pad: GPIO6
Connected internally to GPIO6–GPIO11 (Pins 17–22 NC on module edge)

3.3V Quad SPI XIP flash memory.

Pin Assignment Planner

Add the peripherals you need and plan the pin assignments

Full Pin Reference (39 Pins)

Pin # Label Type Functions Warnings & Notes
1 GND ground GND
Module system ground (0V)
2 3V3 power 3V3
[CAUTION] 3.0V–3.6V supply only (>=500 mA current capability + 10 µF & 0.1 µF decoupling)
Wi-Fi TX bursts draw high peak current. Exceeding 3.6V permanently damages the SoC and onboard flash.
Main 3.3V module power supply input (3.0V–3.6V; >=500 mA regulator recommended)
3 EN CHIP_PU reset CHIP_PU
[CAUTION] Active-HIGH chip enable / reset — never leave floating
High enables ESP32; Low powers off the chip. Connect an external 10 kΩ pull-up to 3.3V and 1 µF delay capacitor to GND.
Active-HIGH chip enable / reset input (EN / CHIP_PU)
4 SENSOR_VP GPIO36 mixed GPIO36 ADC1_CH0
[CAUTION] Input-only pin — NO output driver and NO internal pull-up/pull-down resistors
GPIO36 (RTC/ADC1 domain) can only be used as a digital or analog input. Provide an external pull-up or pull-down resistor if driven by an open-drain or mechanical switch.
Input-only RTC/ADC1 GPIO36 (no output driver, no internal pull resistors, 3.3V max)
5 SENSOR_VN GPIO39 mixed GPIO39 ADC1_CH3
[CAUTION] Input-only pin — NO output driver and NO internal pull-up/pull-down resistors
GPIO39 (RTC/ADC1 domain) can only be used as a digital or analog input. Provide an external pull-up or pull-down resistor if driven by an open-drain or mechanical switch.
Input-only RTC/ADC1 GPIO39 (no output driver, no internal pull resistors, 3.3V max)
6 IO34 GPIO34 mixed GPIO34 ADC1_CH6
[CAUTION] Input-only pin — NO output driver and NO internal pull-up/pull-down resistors
GPIO34 (RTC/ADC1 domain) can only be used as a digital or analog input. Provide an external pull-up or pull-down resistor if driven by an open-drain or mechanical switch.
Input-only RTC/ADC1 GPIO34 (no output driver, no internal pull resistors, 3.3V max)
7 IO35 GPIO35 mixed GPIO35 ADC1_CH7
[CAUTION] Input-only pin — NO output driver and NO internal pull-up/pull-down resistors
GPIO35 (RTC/ADC1 domain) can only be used as a digital or analog input. Provide an external pull-up or pull-down resistor if driven by an open-drain or mechanical switch.
Input-only RTC/ADC1 GPIO35 (no output driver, no internal pull resistors, 3.3V max)
8 IO32 GPIO32 mixed GPIO32 ADC1_CH4 TOUCH9 XTAL_32K_P
General-purpose 3.3V GPIO32 (NOT 5V tolerant)
9 IO33 GPIO33 mixed GPIO33 ADC1_CH5 TOUCH8 XTAL_32K_N
General-purpose 3.3V GPIO33 (NOT 5V tolerant)
10 IO25 GPIO25 mixed GPIO25 ADC2_CH8 DAC_1
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
General-purpose 3.3V GPIO25 (NOT 5V tolerant)
11 IO26 GPIO26 mixed GPIO26 ADC2_CH9 DAC_2
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
General-purpose 3.3V GPIO26 (NOT 5V tolerant)
12 IO27 GPIO27 mixed GPIO27 ADC2_CH7 TOUCH7
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
General-purpose 3.3V GPIO27 (NOT 5V tolerant)
13 IO14 GPIO14 mixed GPIO14 ADC2_CH6 TOUCH6 HSPICLK MTMS
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
General-purpose 3.3V GPIO14 (NOT 5V tolerant)
14 IO12 GPIO12 mixed GPIO12 ADC2_CH5 TOUCH5 HSPIQ MTDI
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
[DANGER] VDD_SDIO flash voltage strap (weak pull-down: LOW=3.3V, HIGH=1.8V — boot failure risk!)
Pulling GPIO12 (MTDI) HIGH during reset switches internal flash power VDD_SDIO to 1.8V, causing boot brownout/loops on 3.3V flash modules (WROOM-32E, WROVER-E) unless overridden via eFuse.
General-purpose 3.3V GPIO12 (NOT 5V tolerant)
15 GND ground GND
Module system ground (0V)
16 IO13 GPIO13 mixed GPIO13 ADC2_CH4 TOUCH4 HSPID MTCK
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
General-purpose 3.3V GPIO13 (NOT 5V tolerant)
17 NC nc —
NC on WROVER-E (isolated from internal SPI flash; leave floating)
18 NC nc —
NC on WROVER-E (isolated from internal SPI flash; leave floating)
19 NC nc —
NC on WROVER-E (isolated from internal SPI flash; leave floating)
20 NC nc —
NC on WROVER-E (isolated from internal SPI flash; leave floating)
21 NC nc —
NC on WROVER-E (isolated from internal SPI flash; leave floating)
22 NC nc —
NC on WROVER-E (isolated from internal SPI flash; leave floating)
23 IO15 GPIO15 mixed GPIO15 ADC2_CH3 TOUCH3 HSPICS0 MTDO
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
[INFO] ROM boot log strapping pin (weak pull-up: HIGH=U0TXD boot log enabled, LOW=silent)
Controls early ROM bootloader messages on U0TXD (GPIO1) during reset.
General-purpose 3.3V GPIO15 (NOT 5V tolerant)
24 IO2 GPIO2 mixed GPIO2 ADC2_CH2 TOUCH2
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
[CAUTION] Download boot strapping pin (weak pull-down: must be LOW or floating to flash)
Must be LOW or left floating when GPIO0 is pulled LOW to enter UART Download Boot.
General-purpose 3.3V GPIO2 (NOT 5V tolerant)
25 IO0 GPIO0 mixed GPIO0 ADC2_CH1 TOUCH1
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
[CAUTION] Boot mode strapping pin (weak pull-up: HIGH=SPI Flash Boot, LOW=Download Boot)
Sampled at reset. Holding GPIO0 LOW with GPIO2 LOW enters UART0 Download Boot.
General-purpose 3.3V GPIO0 (NOT 5V tolerant)
26 IO4 GPIO4 mixed GPIO4 ADC2_CH0 TOUCH0
[CAUTION] ADC2 channel unavailable while Wi-Fi radio is active
The Wi-Fi transceiver shares the SAR ADC2 controller. Use ADC1 (GPIO32–GPIO39) whenever Wi-Fi and analog reads run concurrently.
General-purpose 3.3V GPIO4 (NOT 5V tolerant)
27 NC nc —
NC on WROVER-E (GPIO16 used internally for 8 MB PSRAM CS#; leave floating!)
28 NC nc —
NC on WROVER-E (GPIO17 used internally for 8 MB PSRAM CLK; leave floating!)
29 IO5 GPIO5 digital GPIO5 VSPICS0
[INFO] SDIO Slave timing strapping pin (internal weak pull-up)
Sampled at reset only if SDIO Slave mode is used; safe for normal general-purpose output.
General-purpose 3.3V GPIO5 (NOT 5V tolerant)
30 IO18 GPIO18 digital GPIO18 VSPICLK
General-purpose 3.3V GPIO18 (NOT 5V tolerant)
31 IO19 GPIO19 digital GPIO19 VSPIQ U0CTS
General-purpose 3.3V GPIO19 (NOT 5V tolerant)
32 NC nc —
No internal connection — leave floating on host PCB
33 IO21 GPIO21 digital GPIO21 I2C0_SDA
General-purpose 3.3V GPIO21 (NOT 5V tolerant)
34 RXD0 GPIO3 digital GPIO3 U0RXD
[INFO] Default UART0 console & bootloader RX pin
Outputs/receives ROM bootloader traffic at reset unless silenced via GPIO15.
General-purpose 3.3V GPIO3 (NOT 5V tolerant)
35 TXD0 GPIO1 digital GPIO1 U0TXD
[INFO] Default UART0 console & bootloader TX pin
Outputs/receives ROM bootloader traffic at reset unless silenced via GPIO15.
General-purpose 3.3V GPIO1 (NOT 5V tolerant)
36 IO22 GPIO22 digital GPIO22 I2C0_SCL U0RTS
General-purpose 3.3V GPIO22 (NOT 5V tolerant)
37 IO23 GPIO23 digital GPIO23 VSPID
General-purpose 3.3V GPIO23 (NOT 5V tolerant)
38 GND ground GND
Module system ground (0V)
39 EPAD ground GND
Underside exposed thermal & RF ground pad (connect to host GND plane)