Nextion serial port issue
oke, a while ago I've put a dash on the Nextion via editor and simhub and it WORKS all fine. Now I want to upload a new dash on it, but with Nextion uploader I keep getting the message "Unable to open Serial Port COM4". Also after reset (unplug USB). Is COM 4 printed in Nextion or something? I did switch the USB port few times.
Hi it simply means an application is already using the serial port, make sure to close any potential apps using it (including simhub),
Oke, so i should close all other app you said, so you mean stuff using the USB ports? And then only connect the nextion? I was in assumption that the COM4 was in use of the Nextion.
I will try to disconnect everything beside of the nextion. Thx