NODEMCU to Arduino Pro Mini via serial

Other Hardware 3rd Party Boards
1

I'm starting to setup an Arduino Mini connected to a NodeMCU via the Serial UART.

My question is on the NodeMCU side (so this may not be the right place to ask but I though I'd give it a try)

The UART0 of the NODEMCU board connects to:

  1. CP2101
  2. GPIO1 (Tx) and GPIO3 (Rx)

My question is; If I connect the Arduino to the Tx and Rx lines the Rx would be driving the output of the CP2102. Am I right in this assumption? Or does the CP2102 go to a High Z state if no data is detected on the USB input?

Thanks
John