ESP8266 Community Forum

Let me start simply without needless clutter here. I am using an NodeMCU (ESP-12E Module). The other day this current sketch worked perfectly using Port 10. The last several days I can only upload it using Port 11, but it does upload properly. But it gives me no serial monitor readout. Looking in the tools->port output I see only two choices Com port 3 and com port 11. Assuming it would run properly if I could chose port 10, how can I get com port 10 as an option.

the ports change according to the usb connector you use.
So just plug it to the usb connector you used the previous day.

Thanks for the tip. I appreciate any help I can get. Unfortunately I only have one USB cable that reaches the work bench I am using. It is the only USB cable I used, both before it worked, and then when it stopped working. Just to check I have a much shorter cable, I had to move the board much closer to try it, I still got the troublesome Port 11. I tried the shorter cable on another USB port & got once more the Port 11.

If you have any more ideas, please let me hear from you.

hmmm, is it possible that you have used a different NodeMCU that has different USB-serial chip?

you cyn check which type of USB-serial chip has been used on COM10 if you go into device-manager, activate"show hidden devices", then open connections (COM and LPT) ...