Using 2nd Nano for S meter

Brian Arnott
 

I wired up a second arduino nano to provide an s-meter using the "fun" design from KD8CEC (two 20k resistors and a capacitor). How do I assign an address to the second nano?
Right now it looks as though they are both on the same address, I've tried various combinations of the NX.hex and NX_S.hex without any success. 
Any help would be much appreciated.

de Brian G3YYT

Join BITX20@groups.io to automatically receive all group messages.