![]() can use SoftwareSerial on boards that support it (not supported on Arduino Due). ![]() can be configured to use the default hardware serial port on most Arduino boards (not supported on Arduino Due),.built-in high-speed automatic voltage-level-translation allows for use of 3.3v and 5v Arduino boards and protects the ESP8266 GPIO pins from over-voltage (not available on 3.3v-ONLY version).on-board 3.3v regulator to provide plenty of power to the ESP8266 module.on-board ESP-07 with onboard and external antenna (3.3v/5V version) or ESP-12E (3.3v-ONLY version).This shield uses serial protocol to communicate between the Arduino and on-board ESP8266 to allow for the use of existing HTTP/WiFi libraries, and leaves the SPI and I2C ports available for other uses. This version does not include the external WiFi antenna. The 3.3v-ONLY version should only be used with 3.3v Arduino boards like the Arduino Due. NOTE: A cost-reduced 3.3v-ONLY version is this shield is available. If your Arduino has a serial port, you can use this shield to give it WiFi capabilities. Easily add WiFi capabilities to any 3.3V or 5V Arduino that conforms to the UNO 3 footprint (UNO/Genuino, MEGA/MEGA2560, Due, etc).
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