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Connection fail problem

Hi there.. 

Im new on nextion lcd. I want to use it for my projects. But I have a problem about connection. I supply from stm32f4 disco board because I dont have external supply here. I use just 5 V and gnd from stm32f4. And I use usb to rs232 translate with max232 circuit on bread board. Its very confused but it was worked until 5 min ago. stm32f4 disco board supply was cut-off when uploading project and lcd is not working yet. What should I do? 


Any suggestion?

What do you mean of " stm32f4 disco board supply was cut-off when uploading project"?

Hi Yavuz,

Dont use usb to rs232 converter with max232. Use usb to rs232  converter with TTL level.

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