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I2C Communication between Arduino and Raspberry Pi

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Introduction
We have already examined the I2C bus in a fair amount of detail. We have seen how the I2C bus works, and how we can create our own I2C sensors and devices using an Arduino. Today we will take another look at I2C, and this time we’ll be using both an Arduino and Raspberry Pi.

Both the Arduino and the Raspberry Pi support I2C, however interfacing them can present a special challenge as they don’t work at the same logic voltage levels. The Raspberry Pi uses 3.3-volt logic, whereas most Arduino’s (including the Arduino Uno) make use of 5-volt logic.

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However, despite these voltage differences it is possible to interface the two devices. In fact, there are two ways to do it.

 

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Author: Ho Quang Dai

I am Ho Quang Dai, from Vietnam – A country that loves peace. I share completely free courses from major academic websites around the world. Hope to bring free knowledge to everyone who can’t afford to buy


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