ESP8266 ESP-12E Wifi Wi-Fi UART IoT Wireless Internet Module Shield for Arduino UNO R3 / MEGA

Product Name : ESP8266 Wifi Shield

• Compatible with Arduino UNO R3 / MEGA 2560 (Standard UNO R3 Pin interface)
• With a stackable design , you can continue to add other modules on top for ease of use.
• Using the advanced 3.3V power chip
• The onboard ESP8266-12 industrial grade stable WiFi module has a metal shield and is highly resistant to interference.
• Built-in 5V to 3.3V TTL level shifter prevents high voltage Arduino TTL levels from damaging the WiFi module. (General modules are not available)
• The operation mode (such as operation mode and upgrade mode) of the ESP8266-12 industrial-grade stable WiFi module can be quickly switched by the DIP switch, and the serial port chip can be integrated to quickly write the firmware.
• All interfaces of the onboard ESP8266-12 industrial grade stable WiFi module are taken out at standard intervals , which is convenient for developers to develop in depth.
• The Arduino library of the ESP8266-12 industrial-grade stable WiFi module written by this station can be controlled by very simple instructions to provide routines.
• Onboard four LED displays the status of ESP8266, namely PWR, DFU, AP, STA
   

Tutorial / Reference Link : 

• https://www.instructables.com/ESP8266-ESP-12E-UART-Wireless-WIFI-Shield-TTL-Conv/
• https://elfquake.wordpress.com/2018/02/25/arduino-esp8266-shiald-step-by-step/
• https://arduino.stackexchange.com/questions/24919/how-to-connect-wi-fi-shield-esp-12e-esp8266-uart-wifi-wireless-shield-with-ardui
• https://medium.com/@manrick01/arduino-uno-esp8266-esp-12e-uart-wifi-wireless-shield-3a39858e5f25