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-IE 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)

Pins 27 and 28 are NC on the module edge.

External Coaxial Antenna Receptacle (U.FL / IPEX MHF I) System
Chip Pad: LNA_IN
Onboard 50Ω U.FL / IPEX external 2.4 GHz antenna connector

Both WROVER-E and WROVER-IE share the full 18.0×31.4 mm PCB length.

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)