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Module 5: External Communication Interface

20252m

Which protocol is commonly used for sensor interfacing?

(i) I2C
(ii) FTP
(iii) HTTP
(iv) SMTP

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Answer: (i) I2C

Explanation: For sensor interfacing, I2C and SPI are common. I2C uses 2 wires (SDA, SCL) and allows multiple sensors on same bus with addressing, low pin count, ideal for embedded sensor networks. FTP/HTTP/SMTP are internet application protocols, not sensor buses.

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