To make your project working, you have to follow these steps:
1. Connect NodeMCU and UNO-1 as per Fig-1. Check that the reading (from 0.00 V to 5.00 V) in the Serial Monitor of Master changes as the Pot1 is rotated.
Figure-1:
2. Post the Master/Slave sketches and readings of the Master Serial Monitor to get help for the next step.
3. Tell the names/link of the sensors that you want to connect with UNO-1.