ESP32-WROOM-32D and ESP32-WROOM-32U are powerful, generic Wi-Fi+BT+BLE MCU modules that target a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding.
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ESP32-WROOM-32D and ESP32-WROOM-32U are powerful, generic Wi-Fi+BT+BLE MCU modules that target a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding.
ESP32-WROOM-32U is different from ESP32-WROOM-32D in that ESP32-WROOM-32U integrates a U.FL connector. At the core of the two modules is the ESP32-D0WD chip that belongs to the ESP32 series* of chips. The chip embedded is designed to be scalable and adaptive. There are two CPU cores that can be individually controlled, and the CPU clock frequency is adjustable from 80 MHz to 240 MHz. The user may also power off the CPU and make use of the low-power co-processor to constantly monitor the peripherals for changes or crossing of thresholds. ESP32 integrates a rich set of peripherals, ranging from capacitive touch sensors, Hall sensors, SD card interface, Ethernet, high-speed SPI, UART, I²S and I²C.
The integration of Bluetooth, Bluetooth LE and Wi-Fi ensures that a wide range of applications can be targeted, and that the module is all-around: using Wi-Fi allows a large physical range and direct connection to the Internet through a Wi-Fi router, while using Bluetooth allows the user to conveniently connect to the phone or broadcast low energy beacons for its detection. The sleep current of the ESP32 chip is less than 5 µA, making it suitable for battery powered and wearable electronics applications. The module supports a data rate of up to 150 Mbps, and 20 dBm output power at the antenna to ensure the widest physical range. As such the module does offer industry-leading specifications and the best performance for electronic integration, range, power consumption, and connectivity. The operating system chosen for ESP32 is freeRTOS with LwIP; TLS 1.2 with hardware acceleration is built in as well. Secure (encrypted) over the air (OTA) upgrade is also supported, so that users can upgrade their products even after their release, at minimum cost and effort.
| Module | ESP32-WROOM-32D | ESP32-WROOM-32U |
| Core | ESP32-D0WD(Xtensa® 32-bit LX6 MCU) | ESP32-D0WD(Xtensa® 32-bit LX6 MCU) |
| SPI flash | 32 Mbits, 3.3 V | 32 Mbits, 3.3 V |
| Crystal | 40 MHz | 40 MHz |
| Antenna | PCB antenna | IPEX Antenna |
| Dimensions (Unit: mm) | (18.00±0.10) × (25.50±0.10) × (3.10±0.10) | (18.00±0.10) × (19.20±0.10) × (3.20±0.10) |
| Categories | Items | Specifications |
| Certification |
RF Certification Wi-Fi Certification Bluetooth certification Green Certification |
FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC Wi-Fi Alliance BQB REACH/RoHS |
| Test | Reliablity | HTOL/HTSL/uHAST/TCT/ESD |
| Wi-Fi |
Protocols Frequency range |
802.11 b/g/n (802.11n up to 150 Mbps) A-MPDU and A-MSDU aggregation and 0.4 µs guard interval support 2.4 GHz ~ 2.5 GHz |
| Bluetooth |
Protocols Radio Audio |
Bluetooth v4.2 BR/EDR and BLE specification NZIF receiver with –97 dBm sensitivity Class-1, class-2 and class-3 transmitter,AFH CVSD and SBC |
| Hardware |
Module interfaces On-chip sensor Integrated crystal Integrated SPI flash Operating voltage/Power supply Operating current Minimum current delivered by power supply Recommended operating temperature range |
SD card, UART, SPI, SDIO, I2C, LED PWM, Motor,PWM, I2S, IR, pulse counter, GPIO, capacitive touch,sensor, ADC, DAC Hall sensor 40 MHz crystal 4 MB(8 MB flash or 16 MB flash are available for custom order) 2.7 V ~ 3.6 V Average: 80 mA 500 mA –40 °C ~ +85 °C |
| Name | No. | Type | Function |
| GND |
1 15 38 |
P | Ground |
|
3V3 |
2 | I | Power supply |
|
EN |
3 | I | Module-enable signal. Active high. |
|
SENSOR_VP SENSOR_VN |
4 5 |
I I |
GPIO36, ADC1_CH0, RTC_GPIO0 GPIO39, ADC1_CH3, RTC_GPIO3 |
|
IO34 IO35 IO32 IO33 IO25 IO26 IO27 IO14 IO12 IO13 IO15 IO2 IO0 IO4 IO16 IO17 IO5 IO18 IO19 IO21 IO22 IO23 |
6 7 8 9 10 11 12 13 14 16 23 24 25 26 27 28 29 30 31 33 36 37 |
I/O |
GPIO34, ADC1_CH6, RTC_GPIO4 GPIO35, ADC1_CH7, RTC_GPIO5 GPIO32, XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4, TOUCH9, RTC_GPIO9 GPIO33, XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5, TOUCH8, RTC_GPIO8 GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0 GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1 GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK, EMAC_TXD2 GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3 GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3, EMAC_RX_ER GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD, SD_CMD, EMAC_RXD3 GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0, SD_DATA0 GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1, EMAC_TX_CLK GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1, EMAC_TX_ER GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180 GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK GPIO18, VSPICLK, HS1_DATA7 GPIO19, VSPIQ, U0CTS, EMAC_TXD0 GPIO21, VSPIHD, EMAC_TX_EN GPIO22, VSPIWP, U0RTS, EMAC_TXD1 GPIO23, VSPID, HS1_STROBE |
|
RXD0 TXD0 |
34 35 |
I/O |
GPIO3, U0RXD, CLK_OUT2 GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2 |
|
SHD/SD2 SWP/SD3 |
17 18 |
I/O |
GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD |
|
SCS/CMD SCK/CLK SDO/SD0 SDI/SD1 |
19 20 21 22 |
I/O |
GPIO11, SD_CMD, SPICS0, HS1_CMD, U1RTS GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS |
|
NC |
32 | - | - |
ESP32-MeshKit-Sense Hardware Design Guidelines
ESP32-WROOM-32 Reference Design V1.1 (recommended for developers who design modules themselves) r1.0
Espressif Products Ordering Information
Flash Download Tools (ESP8266 & ESP32)
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Brand: Semtech
ESP32-WROOM-32D and ESP32-WROOM-32U are powerful, generic Wi-Fi+BT+BLE MCU modules that target a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding.
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