Description

The core of the ESP32-WROOM-32D and ESP32-WROOM-32U modules is the ESP32-D0WD chip, which belongs to the ESP32 series*, which is scalable and adaptive. The two CPU cores can be controlled separately. The adjustment range of the clock frequency is from 80 MHz to 240 MHz. The user can cut off the power of the CPU and use the low-power coprocessor to continuously monitor the status changes of the peripherals or whether certain analog quantities exceed the threshold. ESP32 also integrates a wealth of peripherals, including capacitive touch sensors, Hall sensors, SD card interface, Ethernet interface, high-speed SDIO/SPI, UART, I²S and I²C, etc.

The module integrates traditional Bluetooth-compatible function, low energy Bluetooth-compatible function and Wi-Fi, and has a wide range of uses: Wi-Fi supports a wide range of communication connections, and also supports direct connection to the Internet through a router; Bluetooth-compatible allows users to connect to mobile phones or broadcast BLE Beacon to facilitate signal detection. The sleep current of the ESP32 chip is less than 5 µA, making it suitable for battery-powered wearable electronic devices. The module supports a data transmission rate of up to 150 Mbps, and an antenna output power of 20 dBm, which can achieve the widest range of wireless communication. Therefore, this module has industry-leading technical specifications and has excellent performance in terms of high integration, wireless transmission distance, power consumption, and network connectivity.

The operating system of ESP32 is freeRTOS with LwIP, and TLS 1.2 with hardware acceleration is built in. The chip also supports OTA encryption upgrade, which is convenient for users to continue upgrading after the product is released.

Feature

Wi-Fi+BT+Bluetooth-compatible LE MCU module
Built-in ESP32-D0WD
PCB onboard antenna
High integration
Low power
CE-RED/FCC/ROHS
4MB/8MB/16MB Flash

block diagram of ESP32 WiFi module

physical dimension of ESP32 WiFi module

Specification

Module: ESP32-WROOM-32D
Core: ESP32-D0WD
SPI flash: 32 Mbits, 3.3 V 32 Mbits, 3.3 V

Crystal: 40 MHz
Antenna: onboard antenna
Dimensions: (Unit: mm)(18.00±0.10) × (25.50±0.10) × (3.10±0.10)

Categories	Items	Specifications
Certification	RF Certification	FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC
	Wi-Fi Certification	Wi-Fi Alliance
	Bluetooth-compatible certification	BQB
	Green Certification	REACH/RoHS
Test	Reliablity	HTOL/HTSL/uHAST/TCT/ESD
Wi-Fi	Protocols	802.11 b/g/n (802.11n up to 150 Mbps)
	Protocols	A-MPDU and A-MSDU aggregation and 0.4 µs guard interval support
	Frequency range	2.4 GHz ~ 2.5 GHz
Bluetooth-compatible	Protocols	Bluetooth-compatible v4.2 BR/EDR and BLE specification
	Radio	NZIF receiver with –97 dBm sensitivity
		Class-1, class-2 and class-3 transmitter
		AFH
	Audio	CVSD and SBC
Hardware	Module interfaces	SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC
	On-chip sensor	Hall sensor
	Integrated crystal	40 MHz crystal
	Integrated SPI flash 1	4 MB
	Operating voltage/Power supply	3.0 V ~ 3.6 V
	Operating current	Average: 80 mA
	Minimum current delivered by power supply	500 mA
	Recommended operating temperature range 2	–40 °C ~ +85 °C
	Moisture sensitivity level (MSL)	Level 3