All DLN-series adapters support I2C master interface. Some of them can have several independent I2C ports. To know the number of available I2C master ports, use the DlnI2cMasterGetPortCount() function.Before using the I2C bus for transmitting data, you need to configure the I2C master port and enable it (see Configuring the I2C Master Interface). To stop using the I2C master port, you can disable it by the DlnI2cMasterDisable() function.