RPI Hardware

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ID_SD and ID_SC pins

  • You can't use GPIO 0/1 as an I2C bus on the Pi3. On the Pi3 I2C bus 0 is used internally.
  • You can use GPIO 0/1 as ordinary inputs and outputs on the Pi3.
  • There are no restrictions on earlier Pi models, you can use GPIO 0/1 as ordinary GPIO or as an I2C bus.