UART Shield Development Board For Arduino UNO R3 Circuits Boards Modul

The ESP8266 ESP-12E UART WIFI Wireless Shield is an expansion board that adds Wi-Fi connectivity to standard-size Arduino boards like the Uno and Mega.

Key Features

Onboard Module: Features an industrial-grade ESP8266-12E module with a metal shielding can and an enhanced PCB antenna for better signal quality.

Voltage Regulation: Includes a built-in 5V to 3.3V TTL level converter and power chip to protect the 3.3V ESP8266 from higher 5V Arduino signals.

Compatibility: Uses a standard Arduino pin mapping layout for stackable designs on Uno and Mega boards.

DIP Switches: Features onboard switches to easily configure operating modes, serial routing, or firmware flashing states.

Managing the Onboard DIP Switches

The shield features an integrated 4-way DIP switch (labeled SW1 through SW4) that determines how the ESP8266 interacts with the host Arduino board and handles serial communication:

SW1 (ESP_TX to D0): Connects the ESP8266 transmitter pin directly to the Arduino's hardware RX pin (D0).

SW2 (ESP_RX to D1): Connects the ESP8266 receiver pin directly to the Arduino's hardware TX pin (D1).

SW3 (DFU / Bootloader): Used to put the ESP8266 into flashing/firmware upgrade mode.

SW4 (LED Activity): Enables an onboard DFU LED indicator to visually show serial data activity.