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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
Order Summary
SKU |
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 SD Card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR GPIO, Capacitive touch sensor, ADC, DAC, LNA pre-amplier |
| Memory | 4 MB, 8 MB, or 16 MB Flash 448kB ROM 536kB SRAM |
| Mpn | ESP32-WROOM-32U |
| 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 Network: IPv4, IPv6, SSL, TCP/UDP/HTTP/FTP/MQTT |
| Radio | Power Output 20.5 dBm Sensitivity -98dBm |
| Security/protection | Security: WPA/WPA2/WPA2-Enterprise/WPS Encryption: AES/RSA/ECC/SHA |
| Sensors |
|
| 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 |
Documentation |
|
|---|---|
| ESP-WROOM-32U Datasheet | View (PDF) |
| ESP-WROOM-32 Datasheet | View (PDF) |
| ESP32 Datasheet | View (PDF) |
Downloads |
|
|---|---|
| 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) |
Tech Support
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