ESP-WROOM-02 is a low-power 32-bit MCU Wi-Fi module, based on the ESP8266 chip.
Similar in function to the ESP8266 modules but fully certified.

• Superior performance to other ESP8266 modules.
• Best FCC Results in the WiFi module industry.
• Output Power: +22dBm peak power in FCC certification
• Fully certified: Wi-Fi Alliance, SRRC, FCC, CE, TELEC, IC & KCC Certified.
• A small size of only 18 mm x 20 mm
• Built in PCB antenna
• Designed and Manufactured by Espressif, the designers of the ESP8266EX chip.

• ESP-WROOM-02 is a low-power 32-bit MCU Wi-Fi module, based on the ESP8266EX chip. TCP/IP network stacks, 10-bit ADC, and HSPI/UART/PWM/I2C/I2S interfaces are all embedded in this module.

• Wi-Fi mode Station/SoftAP/SoftAP + Station

• Security WPA/WPA2
• Encryption WEP/TKIP/AES
• Firmware upgrade UART Download/OTA (via network)/Download and write firmware via host.

ESP-WROOM-S2 has 2 MB of Flash memory for storing your program or standard firmware.

These modules can be used as WiFi slaves through the AT-commands or code can be written in the Arduino environment and downloaded to the on module flash memory. Currently, the Wi-Fi stack only takes up 20% of CPU time. The remaining CPU time (80% of total MIPS) can be used for user applications. The CPU is a Tensilica L106 32-bit micro-controller with an 80MHz clock speed. When the WROOM-02 is working in Station mode and connected to a router, approximately 50kB of RAM is available in the Heap + Data sector.

Hardware

• Peripheral interface: UART/HSPI/I2C/I2S/IR Remote
• GPIO/PWM
• Operating voltage 2.5V ~ 3.6V
• Operating current Average: 80 mA
• Operating temperature range -40°C ~ 85°C
• Storage temperature -40°C ~ 85°C
• Package size 18 mm x 20 mm x 3 mm

I received production versions of the module that are fully certified and marked with the FCC and CE id's. The photos show the fully certified production unit as well as a pre-production unit. Pre-production units are uncertified and are marked "Special Client Only"

Volume discounts are available.