Description:
    1. Standard pin interface to achieve full compatibility with the pitch Arduino Uno,
       Mega and so on. (Unless the standard size arduino, such as Nano, Mini)
    2. 3.3V power supply using advanced chip (with the official expansion board power
      chip CC3000 same), so 3.3V Arduino board provided more accurate, so ESP8266 as official
      cc3000 chip work as normal, there is no gap.
    3. It leads to a WiFi module power supply / service interface to facilitate developers
       to extend the power supply and maintenance.
    4. Onboard ESP8266-12 stable industrial grade serial WiFi module, using an enhanced
       PCB antenna, signal better.
    5. You can quickly switch DIP switch ESP8266-12 industrial grade WiFi stable operation
       mode (such as operating mode and upgrade mode) module, integrated serial chip,
       quickly flashing the firmware.
    6. Built-in 5V to 3.3V TTL level converter to prevent high-pressure Arduino TTL level
       of the WiFi module damage.
    7. Onboard ESP8266-12 stable industrial grade WiFi module with a metal shield, immunity
       to interference.
    8. Onboard ESP8266-12 standard pitch leads to a stable industrial grade WiFi module
       all interfaces, enabling developers to easily develop deep.
    9. Use stackable design, it can continue to accumulate above the other modules, easy to use.
    10. Onboard four LED displays the status of ESP8266, namely PWR, DFU, AP, STA