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Topic: Wire sample problem? (Read 398 times) previous topic - next topic

blacblu

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?


Nick Gammon

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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