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