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Finger print sensor uses which interface?

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Finger print sensor uses which interface?

(a) USART protocol

(b) UART protocol

(c) SPI protocol

(d) I2C protocol

The question was asked in an online interview.

This key question is from UART Protocol topic in portion Internet Principles of IOT

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Right option is (b) UART protocol

The best explanation: Projects that use RFID modules can be built with modules that have a UART interface. This even applies to some finger print sensors.

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