Delivery:
2MB ships same or next business day
4MB/2MB (high temp) ships within 5 to 7 business days
Availability: in stock
30 day Money Back Guarantee *Some Exceptions Apply
Warranty: 1 year Comprehensive support for all products
The ESP-WROOM-02U is a compact, low-power, Wi-Fi module incorporating the ESP8266EX chip. The device supports an external U.FL (IPEX) connector for optimized RF performance. It’s low power consumption and compact size (18 x 14.3 x 3.2 mm) makes the device essential for Internet of Things (IoT) applications.
Common applications include:
- Internet of Things (IoT) solutions
- Industrial wireless control
- Wearable electronics
- Home automation
- Sensor networks
- Wi-Fi location-aware devices
The ESP8266EX chip provides a Tensilica L106 32-bit RISC processor with a maximum clock speed of 160 MHz. The chip supports SPI flash memory with options of 2MB or 4MB and works with the following SPI modes:
- Standard SPI
- DIO (Dual I/O)
- DOUT (Dual Output)
- QIO (Quad I/O)
- QOUT (Quad Output)
The WROOM-02U is customizable with 80% of the processing power available for development through the Real-Time Operating System (RTOS) and Wi-Fi stacks. GitHub provides additional information and code examples.
Order Summary
SKU |
Flash Memory |
Operating Temperature |
Manufacturer Part # |
|---|---|---|---|
| GC-ESP-WROOM-02U | 2 MB | -40ºC to 85ºC (-40ºF to 185ºF) | ESP-WROOM-02U |
| GC-ESP-WROOM-02U-4MB | 4 MB | -40ºC to 85ºC (-40ºF to 185ºF) | ESP-WROOM-02U (4 MB) |
| GC-ESP-WROOM-02U-HT | 2 MB | -40ºC to 105ºC (-40ºF to 221ºF) | ESP-WROOM-02U (M1102H1600US3Q0) |
Features of the ESP-WROOM-02U
- Wi-Fi 802.11 b/g/n
- Integrates with the ESP8266EX chip
- External U.FL (IPEX) connector
- Optimized RF performance
- 2 MB or 4 MB SPI flash memory
- Tensilica L106 32-bit RISC processor
- 26-MHz crystal oscillator
- Secure (encrypted) over the air (OTA) upgrades
- SRRC, FCC, CE (RED), IC, NCC, KCC, TELEC (MIC) certified
- Programmable RAM/ROM interface (iBus)
- Programmable Data RAM interface (dBus)
- AHB interface accesses the register
| ANTENNA | External U.FL (IPEX) connector |
| CERTIFICATIONS | RF: SRRC, FCC, CE (RED), IC, NCC, KCC, TELEC (MIC) Green: RoHS, REACH |
| DIMENSIONS | 18 mm x 14.3 mm x 3.2 mm |
| FIRMWARE | Upgrade: UART Download / OTA (via network) Download and write firmware via host |
| FREQUENCY BAND | Wi-Fi frequency: 2.4 GHz ~ 2.5 GHz (2400M ~ 2483.5M) |
| INTERFACES | UART/HSPI/I2C/I2S/IR Remote Control GPIO/PWM |
| MEMORY | 2 MB or 4 MB |
| MPN | ESP-WROOM-02U |
| PINS | 18 pins |
| POWER | Average Current: 80 mA Minimum Current: 500 mA |
| PROTOCOLS | Wi-Fi: 802.11 b/g/n (802.11n up to 150 Mbps) Network: IPv4, TCP/UDP/HTTP/FTP |
| SECURITY/PROTECTION | Security: WPA/WPA2 Encryption: WEP/TKIP/AES |
| SOFTWARE | Supports Cloud Server Development SDK for custom firmware development |
| TEMPERATURE RANGE | Operating: -40ºC to 85ºC (-40ºF to 185ºF) Storage: -40ºC to 85ºC (-40ºF to 185ºF) High Temp option: -40ºC to 105ºC (-40ºF to 221ºF) |
| TIMERS | On board clock: 26 MHz crystal |
| VOLTAGE | Operating: 2.7V ~ 3.6V |
Documentation |
|
|---|---|
| ESP-WROOM-02U Datasheet | View (PDF) |
| ESP8266 Datasheet | View (PDF) |
| ESP8266 Quick Start Guide | View (PDF) |
Downloads |
|
|---|---|
| ESP8266 AT Bin | Download (ZIP) |
Tech Support
We have the best technical support engineers that know how to use our products. If our Tech Support cannot solve your problem, we will contact the design engineer or manufacturer to help find a resolution.