I operated my layout with DCS & Legacy. Last year I installed MTH WIU. Everything worked fine. I had to replace my wifi. So I had to reinstall everything. The MTH engines installed fine. The Legacy engines didn't. All engines were still operational in the DCS remote except the Legacy engines. So I reinstalled the Legacy engines in the DCS remote. They were excepted, but will not operate.
The batteries were corroded. I cleaned the corrosion & replaced with new batteries in the CAB-1L. This was done prior to operate the Lionel 0-8-0 steam Locomotive. When it didn't operate. I could not remember the original ID#. I assumed the ID# could be replaced as per Manual instructions. But to no avail. So I thought, the Base-1L was the problem.
How do you know the correct channel? Do you count the blinks?