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ESP-WROOM-32U - Wi-Fi/BT/BLE Module with U.FL (IPEX) connector



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The Espressif ESP-WROOM-32U is a powerful and compact module that combines Wi-Fi, Bluetooth (BT), and Bluetooth Low Energy (BLE) to support a wide range of applications. The module boasts a U.FL (IPEX) connector making the module perfect for space-constrained applications.

By integrating the ESP32-D0WD chip, the device offers a dual-core CPU with an adjustable clock frequency (80 MHz to 240 MHz) and can be individually controlled and powered. The CPU may also be powered off to make use of the low power co-processor to continuously monitor the peripherals for a change of state.

Some of the powerful peripherals integrated within the ESP32-D0WD include:

  • Capacitive touch sensors
  • Hall sensors
  • SD card interface
  • Ethernet
  • High speed SPI
  • UART
  • I²S
  • I²C
  • Low-noise sense amplifiers


The WROOM-32U operates on freeRTOS with LwIP; TLS 1.2 with hardware acceleration built-in. The module includes secure encrypted over-the-air (OTA) updates, allowing developers to continually upgrade their products after release with low cost and effort.

The system is completely open-source with a large collection of example code and information on GitHub.

Common applications include:

  • Home automation
  • Wearable electronics
  • Sensor networks
  • Internet of Things (IoT) solutions
  • Voice encoding
  • Music streaming
  • MP3 decoding


Compare ESP-WROOM-32 Series


Order Summary


Flash Memory
Operating Temperature
Manufacturer Part #
GC-ESP-WROOM-32U 4MB -40ºC to 85ºC (-40ºF to 185ºF) ESP32-WROOM-32U
GC-ESP-WROOM-32U-8M 8MB -40ºC to 85ºC (-40ºF to 185ºF) ESP32-WROOM-32U (8 MB)
GC-ESP-WROOM-32U-16M 16MB -40ºC to 85ºC (-40ºF to 185ºF) ESP32-WROOM-32U (16 MB)
GC-ESP-WROOM-32U-HT 4MB -40ºC to 105ºC (-40ºF to 221ºF) ESP32-WROOM-32U (M113DH3200US3Q0)

Features of the ESP-WROOM-32U

  • Combo Wi-Fi, Bluetooth (BT), and Bluetooth Low Energy (BLE) module
  • Integrates with the ESP32-D0WD chip
  • Two independently controlled CPU cores with adjustable clock frequency from 80MHz to 240MHz
  • Sleep current is less than 5 μA, making it suitable for battery-powered and wearable-electronics applications
  • 4-layer FCC, CE ( RED ), IC, TELEC, SRRC, and KCC-compliant design
  • Classic Bluetooth for legacy connections, supporting:
    - L2CAP
    - SDP
    - GAP
    - SMP
    - AVDTP
    - AVCTP
    - A2DP (SNK)
    - AVRCP
  • Including BLE GATT-based profiles, such as BlueFi, SPP-like, etc.
  • Bluetooth Low Energy (BLE) connects to smart phones, broadcasting low-energy beacons for easy detection
  • Wi-Fi modes: Soft-AP/Station/SoftAP+Station/P2P
Antenna U.FL (physically equivalent to IPEX)
Certifications FCC1 / CE1 / CE2 / IC / KCC / NCC / SRRC / TELEC
Dimensions 18mm x 19.2mm x 3.2mm
Firmware Upgrade: UART Download / OTA (via network)
Download and write firmware via host
Frequency band 2.4GHz-2.5GHz (2400M-2483.5M)
Integrated circuit (ic) ESP32-DOWD
Interfaces Wi-Fi mode: station/SoftAP/SoftAP+station/P2P
GPIO, Capacitive touch sensor, ADC, DAC, LNA pre-amplier
Memory 4 MB, 8 MB, or 16 MB Flash
448kB ROM
536kB SRAM
Pins 38 Pins
Power Average: 80 mA
Protocols Wi-Fi: 802.11 b/g/n/d/e/i/k/r (802.11n up to 150 Mbps)
Wi-Fi: A-MPDU and A-MSDU aggregation and 0.4 guard interval support
Bluetooth: Bluetooth v4.2 BR/EDR and BLE specification
Radio Power Output 20.5 dBm
Sensitivity -98dBm
Security/protection Security: WPA/WPA2/WPA2-Enterprise/WPS
Encryption: AES/RSA/ECC/SHA
  • Hall sensor
  • Temperature sensor
Software Supports Cloud server development
SDK for custom firmware development
Temperature range Operating: -40ºC to 85ºC (-40ºF to 185ºF)
High Temp option: -40ºC to 105ºC (-40ºF to 221ºF)
Timers On board clock: 26 MHz crystal, 32 kHz crystal
Voltage Operating: 2.7V ~3.6V


ESP-WROOM-32U Datasheet View (PDF)
ESP-WROOM-32 Datasheet View (PDF)
ESP32 Datasheet View (PDF)


ESP-WROOM-32 Reference Design V1.1 - (recommended for developers who design modules themselves) Download (ZIP)
ESP-WROOM-32 Reference Design V1.0 - (recommended for mass-produced modules) Download (ZIP)
ESP-WROOM-32 AT Bin Download (ZIP)

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