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

(a) UART Mode

(b) Sleep Mode

(c) Active Mode

(d) Flash Mode

This question was addressed to me during an interview.

This question is from ESP8266 Wifi Module in section Interfacing of Sensors, Actuators, and Other Modules of Arduino

1 Answer

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Right answer is (d) Flash Mode

Easy explanation: UART Mode  gives the correct combination of input needed for the module to run the program that is already uploaded to the module.

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