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Nextion serial port issue  

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Raymond Lodewijkx
(@rlodewijkx)
Active Member
Joined: 3 months ago
Posts: 6
05/09/2020 9:32 pm  

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.


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Wotever
(@admin5435)
Member Admin
Joined: 3 years ago
Posts: 335
05/09/2020 9:39 pm  

Hi it simply means an application is already using the serial port, make sure to close any potential apps using it (including simhub),


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Raymond Lodewijkx
(@rlodewijkx)
Active Member
Joined: 3 months ago
Posts: 6
16/09/2020 11:01 am  

@admin5435

 

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


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