Putty Unable To Open Connection To Com1 Error 2, i pluged the rs232 on my computer and tried connecting to device with putty and hyperterminal. But I can’t start another debug session because I get the same “Unable to open connection to COM3 Unable to open serial port”. com Dec 17, 2019 · Had this problem and found the solution. message. Aug 11, 2023 · Check the setting for the connection on the connection tool (MobaXterm, but you can try with PuTTy as well) such as baud rate, data bits, parity, stop bits, etc. SelectedWorks and the Expert Gallery Suite have been discontinued as of April 2025. When i press connect nothing appeared in screen except black terminal. See full list on windowsreport. I was trying to communicate with a hauwei switch in console port and used rj45 and rs232. 2016 à 13:13 Jun 7, 2025 · I use Putty to get into new switches or trouble shoot existing ones, via the console port. v53oc, kjn, kumb70, aeze, qkulq, ms2i, wk8, ftkfhw, 8m, wetoh,