Espresso Lite V2.0 Specs and Features:

• Features Espressif System's ESP8266 WROOM-02 Wi-Fi module (with 4Mb flash)
• Design for IoT with free espert.io cloud and app service
• Support the Arduino IDE (boards manager) and libraries
• Auto program loading from Arduino IDE, using  (or other compatible USB to Serial)
• Vin: 5 to 12VDC
• Operating Voltage: 3.3VDC
• On board 3.3V Voltage Regulator with maximum current of 800mA continuous, 1A peak
• One Reset button, two User Programmable buttons
• WROOM-02 module is FCC, CE & TELEC certified
• Breadboard friendly breakout pins
• Ready pads for I2C OLED panel

WROOM-02 Specs and Features:

• Operating Voltage: 3.0 to 3.6VDC
• Operating Current: Average = 80mA
• IEEE 802.11b/g/n at 2.4 GHz
• WiFi mode: SoftAP/Station/SoftAP + Station
• Security: WPA/WPA2
• Encrytion: WEP/TKIP/AES
• Integrated low power 32-bit MCU
• Integrated 10-bit ADC
• Integrated TCP/IP protocol stack
• Integrated TR switch, balun, LNA, power amplifier and matching network
• Integrated PLL, regulators, and power management units
• Various interfaces available, including SDIO, HSPI, UART, I2C, I2S, IR, PWM, GPIO, etc.
• Supports antenna diversity
• Deep sleep power <10uA, Power down leakage current < 5uA
• Wake up and transmit packets in < 2ms
• Standby power consumption of < 1.0mW (DTIM3)
• +20dBm output power in 802.11b mode
• Operating temperature range -40C ~ 125C
• FCC, CE and TELEC certified