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What mode does the ESP8266 WiFi Module switch to when fed the sequence 0 1 to its GPIO-0 and GPIO-2 Pins?

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What mode does the ESP8266 WiFi Module switch to when fed the sequence 0 1 to its GPIO-0 and GPIO-2 Pins?

(a) UART Mode

(b) Sleep Mode

(c) Active Mode

(d) Flash Mode

The question was posed to me in an online interview.

The query is from ESP8266 Wifi Module in portion Interfacing of Sensors, Actuators, and Other Modules of Arduino

1 Answer

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Best answer
The correct answer is (a) UART Mode

Best explanation: UART Mode  gives the correct combination of input needed for the module to program using Arduino or any serial communication supplied to it externally.

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