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The Arduino Wire library is used for I2C communication. It is often used in the wrong way. This wiki will explain how to use it.

• Common mistakes
• Explanation of the functions of the Wire library
• Check for bus errors ?
• Buffer size of the Wire library
• Tricks that are (almost) allowed

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Nick Gammon wrote an excellent tutorial about I2C and the Arduino Wire library: www.gammon.com.au/i2c

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How to make a reliable I2C bus.