Wi-Fi technology allows communication between a device and a wireless local area network (WLAN). Devices such as personal computers and printers, digital cameras and mobile phones can connect to a Wi-Fi access point over a distance of 20m indoors with greater distances outdoors. Like Bluetooth (see Chapter 16) and wireless (see Chapter 17) communication, Wi-Fi operates at 2.4GHz.
Some Arduino Wi-Fi shields that connect to the Arduino Uno are based on the ESP8266 Wi-Fi microchip. The NodeMCU ESP8266 based ...
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