https://forge.codesys.com/u/repc2026/2026-07-13T00:34:47ZRecent posts by repc20262026-07-13T00:34:47Z2026-07-13T00:34:47Zrepc2026https://forge.codesys.com/u/repc2026/https://forge.codesys.com242d8e6f0ae52da7c27c71f267e543f3762db306

<div class="markdown_content"><p>I 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.</p></div>