I made a project to implement it on LCD through both Arduino and STM32, but after I use Arduino, there is no response when I connect to STM32 to click, what is going on?

 

I made a project to implement it on LCD through both Arduino and STM32, but after I use Arduino, there is no response when I connect to STM32 to click, what is going on?

Is this a guessing game?
What type of LCD are you using?
Which model of Arduino are you using?
How are the LCD and Arduino wired together and powered?
What does the software do?
Can you show a listing of the software?
How is the LCD wired to the STM32 and power supply?
What software are you using on the STM32?
Without answers to the above questions, we can only make wild guesses.

 

I am very sorry for the incomplete information.
I'm using a serial screen from Stone.
I am using an Arduino UNO.
I will upload my connection diagram.

 

Does the LCD still work correctly if you re-connect it to the Arduino? If it does, then the problem is in the pic software or wiring.

 

Does the LCD still work correctly if you re-connect it to the Arduino? If it does, then the problem is in the pic software or wiring.

Yes, my LCD works perfectly fine when connected to the Arduino, but when the LCD is connected to the STM32 there is no response when I tap on the screen.

 

I figured out the problem, when I used Arduino I soldered the interface to TTL, when I used STM32 I should use the RS232 interface, I modified this through the program and managed to get it to respond.