I2C communication with two NRF DK

Hi,

I want to make an I2C communication with an NRF5340 DK as Master and an NRF52840 as Slave, but all the example i found in I2C communication it use the slave adress to communicate,

But i don't know my NRF52840 DK I2C adress, is there a way to make this communication possible ? 

Thank you for your help,

Best Regards,

Daroussi 

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