Custom 32 4MB/16MB ESP32 module WiFi+Bluetooth dual core CPU

The ESP32-WROOM-32 WiFi module is independently designed and developed by Lexin Technology. The core processor of the module, ESP32-WROOM-32, provides a complete set of 802.11 b/g/n/e/i wireless local area network (WLAN) and Bluetooth 4.2 solutions, with a small physical size. This chip is designed specifically for low-power and mobile consumer electronic devices, wearable and IoT devices, and integrates all the functions of WLAN and Bluetooth on the chip, with the characteristics of low cost and good layout. ESP32-WROOM-32 also provides an open platform that allows users to flexibly customize functions for different application scenarios.

ESP32-WROOM-32 Function Block Diagram

ESP32-WROOM-32 is a WiFi and Bluetooth system level chip (SoC) with industry-leading RF performance, low power consumption, and highly integrated advantages. ESP32-WROOM-32 integrates complete transmit/receive RF functions, including antenna switch, RF balun, power amplifier, low noise amplifier, filter, power management module, and advanced self calibration circuit. The self calibration circuit achieves dynamic automatic adjustment to eliminate defects in external circuits. ESP32-WROOM-32 comes with two 32-bit, LX6 CPUs, with a main frequency of up to 240MHz, and adopts a 7-stage pipeline architecture. ESP32-WROOM-32 also integrates rich analog sensing and digital interfaces.

The ultra-low power RF architecture of ESP32-WROOM-32 and patented energy-saving technology extend the battery life in practical applications.

ESP32-WROOM-32 fully complies with the standards of WiFi 802.11b/g/n/e/i and Bluetooth 4.2, integrates WiFi/Bluetooth/BLE RF and low-power technology, and supports an open real-time operating system RTOS. The integrated tuning cache of ESP32-WROOM-32 helps improve system performance and optimize system storage. The flexible RAM/ROM partitioning architecture allows users to customize to meet special requirements and usage scenarios.

ESP32-WROOM-32 can be used as a standalone application or as a slave device for the host MCU. As a slave device, ESP32-WROOM-32 provides WiFi and Bluetooth functionality through SPI/SDIO or I2C/UART interfaces.

Product Features

2.1 WiFi. 1WiFi

• 802.11 b/g/n/e/i

• 802.11 n (2.4 GHz) at speeds up to 150 Mbps

802.11 e: QoS mechanism for implementing wireless multimedia technology

WMM-PS, UAPSD

A-MPDU and A-MSDU frame aggregation technology

Block Reply

• Fragmentation and recombination

Beacon automatic monitoring/scanning

• 802.11 i security features: pre authentication and TSN

Support WPA/WPA2/WPA2 Enterprise/WPS encryption

Infrastructure BSS Station mode/SoftAP mode

• Wi Fi Direct (P2P), P2P discovery, P2P GO mode, and P2P power management

• UMA compatibility and certification

• Antenna diversity and selection

2.2 Bluetooth 2 Bluetooth

Bluetooth v4.2 complete standard, including traditional Bluetooth (BR/EDR) and low-power Bluetooth (BLE)

Supports standard Class-1, Class-2, and Class-3 without the need for external power amplifiers

• Enhanced power control

• Output power up to+10dBm

The NZIF receiver has a BLE reception sensitivity of -98dBm

Adaptive Frequency Hopping (AFH)

Standard HCI based on SDIO/SPI/UART interface

High speed UARTHCI with speeds up to 4Mbps

Support for BT4.2 controller and host protocol stack

Service Discovery Protocol (SDP)

• General Access Application (GAP)

• Security Management Protocol (SMP)

Low power Bluetooth

• ATT/GATT

• HID

Supports all low-power Bluetooth applications based on GATT

SPP-Like low-power Bluetooth data transmission protocol

• BLEBeacon

A2DP/AVRCP/SPP, HSP/HFP, RFCOMM

• CVSD and SBC audio encoding and decoding algorithms

• Bluetooth Piconet and Scatternet

2.3 CPU and storage

• Xtensa ® 32 bit LX6 dual core processor with up to 600 DMIPS computing power

448 KByte ROM

520 KByte SRAM

16 KByte SRAM in RTC

QSPI can connect up to 4 Flash/SRAMs, with each FlashMax being 16 MBytes

Power supply voltage: 2.2V to 3.6V

2.4 Clock and Timer

Built-in 8 MHz oscillator, supporting self calibration

Built in RC oscillator, supporting self calibration

Support for external 2 MHz to 40 MHz crystal oscillators

Supports external 32 kHz crystal oscillator for RTC, supports self calibration

2 timer groups, each consisting of 2 64 bit universal timers and 1 main system watchdog

RTC timer with sub second level accuracy

• RTC Watchdog

2.5 Peripheral interface

12-bit SAR ADC with up to 18 channels

Two 8-bit D/A converters

10 touch sensors

• Temperature sensor

• 4 SPIs

• 2 I2S

• 2 I2C

• 3 UARTs

1 Host SD/eMMC/SDIO

1 Slave SDIO/SPI

Ethernet MAC interface with dedicated DMA, supporting IEEE 1588

• CAN 2.0

• IR (TX/RX)

• Motor PWM

LED PWM, up to 16 channels

Hall sensor

Ultra low power pre analog amplifier

2.6 Security Mechanism 6 Security Mechanism

• Supports all IEEE 802.11 security features, including WFA, WPA/WPA2, and WAPI

• Safe start

• Flash encryption

1024 bit OTP with up to 768 bits available to users

• Encryption hardware accelerator:

– AES

- HASH (SHA-2) library

- RSA

– ECC

Random Number Generator (RNG)

2.7 Application

• Universal low-power IoT sensor hub

• Universal low-power IoT recorder

Video streaming for cameras

OTT TV box/set-top box equipment

• Music player

- Network music player

- Audio streaming devices

• Wi Fi toys

- Counter

- Toy loss prevention device

• Wi Fi speech recognition device

• Earphones

Intelligent socket

• Home automation

• Mesh network

Industrial wireless control

• Baby monitor

• Wearable electronic products

• Wi Fi location aware device

• Security ID label

• Healthcare

- Motion monitoring and anti loss alarm

- Temperature recorder