https://forge.codesys.com/u/repc2026/activity/Recent activity for repc2026enMon, 13 Jul 2026 00:34:51 -0000https://forge.codesys.com/forge/talk/Engineering/thread/4ac69b246d/?limit=25#f63aI am trying to use Codesys to connect by Modbus RTU to an Arduino UNO, I add the Modbus COM Port but when I try to add the master and the slave I don't have these options, I attach an image of the device manager. I am using Codesys 3.5 SP21.repc2026Mon, 13 Jul 2026 00:34:51 -0000https://forge.codesys.com/forge/talk/Engineering/thread/4ac69b246d/?limit=25#f63a