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Author Topic: Wire sample problem?  (Read 325 times)
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I was just reading this tutorial, and making research about it and saw this schematic.

There is missing two pull ups resistors on A5 and A4, right?

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Two Arduinos close together may well work as illustrated, as the Wire library enables internal pull-ups. Better would be to have 4.7K pull-ups on both SDA and SCL.

http://www.gammon.com.au/i2c
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