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How to control nordic uart to other microcontroller?

Hi forum,

I am working on nrf52832, using sdk 15.0.0. I want to send the data(command) from esp32 to nRF52832 through Rx ,Tx . I have done connections rx,tx,gnd . I can't able to transmit and receive the data why ? i have used ble_app_uart examples , i didn't change anything , just included one data to print .

nRF52832 esp32

8 pin Rx-----> Tx 17pin

9 pin Tx ------> Rx 16pin

please someone help me to slove this problem.