Description Features ESP-WROOM-02 is a low-power 32-bit MCU Wi-Fi module, based on the ESP8266 chip. TCP/IP network stacks, 10-bit ADC, and HSPI/UART/PWM/I2C/I2S interfaces are all embedded in this module. ESP-WROOM-S2 uses a SPI flash connected to HSPI, working as the SDIO/SPI slave with the SPI speed of up to 8 Mbps. ESP8266 Module can be easily integrated into space-limited devices, due to its small size of only 18mm x 20mm (ESP-WROOM-02) / 16 mm x 23 mm (ESP-WROOM-S2). Reliable and most certificate: Wi-Fi Alliance, SRRC, FCC, CE, TELEC, IC & KCC Certified RoHS, Halogen Free, REACH & CFSI Compliant HTOL, ESD-HM, MSL, μHAST, HTSL Output Power: 22dBm peak power in FCC certification ESP8266 Module can operate in low-power connectivity mode; for instance, if it operates in DTIM10, it only consumes 1.2mW while maintaining a Wi-Fi connection. The module also integrates an SPI flash of 16 Mbits used for storing user programs, data and firmware. Module is directly supplied from Espressif, sufficient stock and constant price. Current offer SPI Flash Size = 4MB for all variations Variation: WROOM-02D/U further optimized RF performace, pin-to-pin compatible with WROOM-02 WROOM-02D – on board PCB antenna WROOM-02U – on board IPEX antenna connector, can mount external atenna. Documentation of this series please see on this page.
