ESP32-WROOM-32

Wi-Fi+BT+BLE MCU module

The ESP32-WROOM-32 is a wi-fi+bt+ble mcu module from Espressif Systems. View the full ESP32-WROOM-32 datasheet below including pinout, electrical characteristics, absolute maximum ratings.

Manufacturer

Espressif Systems

Overview

Part: ESP32-WROOM-32 (ESP-WROOM-32) from Espressif Systems

Type: Wi-Fi+BT+BLE MCU Module

Description: A powerful, generic Wi-Fi+BT+BLE MCU module featuring two Xtensa 32-bit LX6 CPU cores adjustable from 80 MHz to 240 MHz, supporting Wi-Fi data rates up to 150 Mbps with 20.5 dBm output power, and a deep-sleep current of less than 5 μA.

Operating Conditions:

Supply voltage: 2.7 ~ 3.6V
Operating temperature: -40°C ~ +85°C
CPU clock frequency: 80 MHz to 240 MHz
Wi-Fi data rate: up to 150 Mbps

Absolute Maximum Ratings:

Max supply voltage: 3.6 V
Min current delivered by power supply: 0.5 A
Max output drive capability: 40 mA
Max storage temperature: 85 °C

Key Specs:

CPU: Dual-core Xtensa 32-bit LX6 microprocessors
Internal SRAM: 520 kB (including 8 kB RTC FAST Memory)
Integrated Flash: 4 MB external SPI flash
Wi-Fi Protocols: 802.11 b/g/n (up to 150 Mbps)
Bluetooth Protocols: v4.2 BR/EDR and BLE specification
Wi-Fi Tx Output Power (11b mode): 20.5 dBm
BLE Receiver Sensitivity: -97 dBm
Hibernation Mode Current: 5 μA (RTC timer only)

Features:

Wi-Fi, Bluetooth, Bluetooth LE connectivity
Dual-core CPU with adjustable clock frequency
Low-power co-processor
Rich set of peripherals: SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, GPIO, capacitive touch sensor, ADC, DAC
On-chip sensors: Hall sensor, temperature sensor
FreeRTOS with LwIP, TLS 1.2 with hardware acceleration
Secure Over-The-Air (OTA) upgrade support

Applications:

Low-power sensor networks
Voice encoding
Music streaming
MP3 decoding
Battery powered and wearable electronics applications

Package:

18±0.2 mm x 25.5±0.2 mm x 3.1±0.15 mm

Pin Configuration

ESP32-WROOM-32 Pinout

Pin Number	Pin Name	Type	Function
1	GND	P	Ground
2	3V3	P	Power supply
3	EN	I	Chip-enable signal. Active high.
4	SENSOR_VP	I	GPIO36, SENSOR_VP, ADC_H, ADC1_CH0, RTC_GPIO0
5	SENSOR_VN	I	GPIO39, SENSOR_VN, ADC1_CH3, ADC_H, RTC_GPIO3
6	IO34	I	GPIO34, ADC1_CH6, RTC_GPIO4
7	IO35	I	GPIO35, ADC1_CH7, RTC_GPIO5
8	IO32	I/O	GPIO32, XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4, TOUCH9, RTC_GPIO9
9	IO33	I/O	GPIO33, XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5, TOUCH8, RTC_GPIO8
10	IO25	I/O	GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0
11	IO26	I/O	GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1
12	IO27	I/O	GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV
13	IO14	I/O	GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK, EMAC_TXD2
14	IO12	I/O	GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3
15	GND	P	Ground
16	IO13	I/O	GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3, EMAC_RX_ER
17	SHD/SD2	I/O	GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD
18	SWP/SD3	I/O	GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD
19	SCS/CMD	I/O	GPIO11, SD_CMD, SPICS0, HS1_CMD, U1RTS
20	SCK/CLK	I/O	GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS
21	SDO/SD0	I/O	GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS
22	SDI/SD1	I/O	GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS
23	IO15	I/O	GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD, SD_CMD, EMAC_RXD3
24	IO2	I/O	GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0, SD_DATA0
25	IO0	I/O	GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1, EMAC_TX_CLK
26	IO4	I/O	GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1, EMAC_TX_ER
27	IO16	I/O	GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT
28	IO17	I/O	GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180
29	IO5	I/O	GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK
30	IO18	I/O	GPIO18, VSPICLK, HS1_DATA7
31	IO19	I/O	GPIO19, VSPIQ, U0CTS, EMAC_TXD0
32	NC	—	No Connect
33	IO21	I/O	GPIO21, VSPIHD, EMAC_TX_EN
34	RXD0	I/O	GPIO3, U0RXD, CLK_OUT2
35	TXD0	I/O	GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2
36	IO22	I/O	GPIO22, VSPIWP, U0RTS, EMAC_TXD1
37	IO23	I/O	GPIO23, VSPID, HS1_STROBE
38	GND	P	Ground

Notes

Integrated SPI Flash: Pins 17–22 (GPIO6–GPIO11: SCK/CLK, SDO/SD0, SDI/SD1, SHD/SD2, SWP/SD3, SCS/CMD) are connected to the integrated SPI flash and are not recommended for other uses.
Power pins: Pins 1, 15, 38 are GND; Pin 2 is 3V3.
ADC1 pins: SENSOR_VP (Pin 4) and SENSOR_VN (Pin 5) are input-only and cannot be used as GPIO outputs.
RTC GPIO: Many pins have RTC (Real-Time Clock) GPIO functionality for low-power operation.

Electrical Characteristics

The specifications in this chapter have been tested under the following general condition: VDD = 3.3V, T A = 27°C, unless otherwise specified.

Absolute Maximum Ratings

Table 5: Absolute Maximum Ratings

Parameter	Symbol	Min	Typ	Max	Unit
Power supply	VDD	2.7	3.3	3.6	V
Minimum current delivered by power supply	I VDD	0.5	-	-	A
Input low voltage	V IL	-0.3	-	0.25×V IO 1	V
Input high voltage	V IH	0.75×V IO 1	-	V IO 1 +0.3	V
Input leakage current	I IL	-	-	50	nA
Input pin capacitance	C pad	-	-	2	pF
Output low voltage	V OL	-	-	0.1×V IO 1	V
Output high voltage	V OH	0.8×V IO 1	-	-	V
Maximum output drive capability	I MAX	-	-	40	mA
Storage temperature range	T STR	-40	-	85	°C
Operating temperature range	T OPR	-40	-	85	°C

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
ESP32	Espressif Systems	ESP32-WROOM-32E (18.0 x 25.5 x 3.1 mm)

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