ESP8266 ESP-12E UART WIFI Wireless Shield TTL

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By Wang Tongze in the People's Republic of China

DO NOT waste your time of money with these Arduino shields folks - they are a complete dud!
No Arduino libraries or any support documentation are offered by the Chinese sellers of these shields.
So you are left to try and guess which libraries, offered by PROFESSIONAL sellers of these boards (e.g. Adafruit), will work with them.
I have spent a lot of time trying different libraries and reading various documentation about ESP8622 and I have had no success getting this shield to do anything useful.
And many other buyers of these cheap shield are having similar problems with them.
So don't bother buying them.
You are better off saving yourself a considerable amount of time and effort by purchasing the Adafruit products etc, which come with professional support.
Read this thread on the Arduino forum and you will see how much trouble these shields are:

I've got this board and could not find the way to connect it with my board.
Here are detailed information about it:
forum_arduino_cc/index.php?topic=356174.0
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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

Maybe I can get some suggestion from you.
Thanks a lot.
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