Bought my TIU years ago second hand for $75. Running software 4.2 or 4.3. Non USB version. Haven't played with it in years until wanting a train around the tree this year. Wouldn't play nice via wireless. After reading through Barry's DCS companion (sad to hear he as passed on), I figured I'd try tethering the remote. Picked up the correct 4P4C "phone handset" cable today. I was pleased to see the remote found the TIU, and I was able to add my B&P GP-20 without issue. So, my system works with the remote tethered, but not via wireless. I have re-seated the wifi chip in the TIU, no change. I won't attempt disassembling the remote. I have only one MTH locomotive, so I'm thinking I can get along fine with just the DCS Explorer. I figure I can sell the TIU and remote with the disclaimer that it only works tethered. And perhaps a knowledgeable person can get the wifi working also. As I'm just a casual hobbyist, am I really going to lose functionality or features. Just looking for opinions here. Happy New Year all
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