I2C requires a pullup on the bus. "master" devices like the raspberry pi have those integrated on their PCB, but if this is not the case, this can be solved with this PCB!

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I2C Pull Up

  • Brand: BitWizard
  • Product Code: i2c-pull-up
  • Availability: In Stock
  • €1.95

Tags: i2c, pull, up, pull-up, pullup