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I2C connection

Posted by Peter Seddon on October 27, 2010 at 9:39am
I am in the process of changing my ESC's from ppm to I2C (I have modified 4-30A Turnigy's). 

Do I need to add some pull-ups to the I2C lines from the oilpan or are they fitted already?

Peter

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Replies

  • Peter Koch January 5, 2011 at 3:25pm

    Hi,

    I am very new to this project and planning to build my Quad with I2C ESC´s but I didn´t find any uncommented lines at the code. Please let me know if you finished your conversion and what have you done to get I2C support for the ESC´s.

     

    Peter

  • John Ryan October 27, 2010 at 4:02pm
    A 1.8K on SDA and the same on SCL should do the job.
  • Peter Seddon October 27, 2010 at 1:05pm
    Thanks Sebastian,

    I have finally managed to trace the circuit diagram and I can't see any pullups on the SDA/SCL lines. I have decided to play safe and fit them - my test rig using an ATMega32 certainly needed them when testing my modified ESC's!

    Peter
  • Sebastian Gralla October 27, 2010 at 9:48am
    I didn't need any pullups it just worked fine
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