Thank you for your response, my Legacy LCS design plan is initially similar to yours, “ DB9 base to wifi module, followed by other serial modules right after the WiFi. Am I correct that you have your 6 or 7 sensors in series at the following lengths apart (followed by at least 2 ea 20 ft, a couple or 3 ea 10 ft and a couple or 3 ea 3ft. I have 7 sensors,) . I also connect my sensors in series too.
edited, just read Dave’s post. I will purchase for Lionel, thank you for your offer.