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example of communicating with TCA9535 I/O Expander from ESP32

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TCA9535 ESP32 Example

  • This example will show you how to use TCA9535 I2C I/O Expander:

    • read register data
    • write register data
  • Pin assignment:

    • GPIO33 is assigned as the data signal of i2c slave port
    • GPIO9 is assigned as the clock signal of i2c slave port
    • GPIO39 is assigned to INT output of TCA9535. This functionality is not used in this example

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example of communicating with TCA9535 I/O Expander from ESP32

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