Problem in connecting with Serial Port

I need to confirm that for Bluetooth: Peripheral UART:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/peripheral_uart/README.html#testing

As mentioned here:

 

Do we need any external board? or only Jlink debugger and Thingy Device will be sufficient?

Regards,

Divya

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