I recently have been working with my interface between Nextion and Arduino. I made a small change to my code (arduino) to increase the baud rate from 9600 to 115200 and after updating my code my Nextion screen went blank. I removed 5 vdc from the display and tried to reapply power and it only blinks white. It seems to blink a sequence of 3 and stops and blinks 3 times repeated. Im not sure it has anything to do with my baud rate. I tried to apply external power with only power and ground but it does the same thing. Is this sequence of screen blinks a clue as to what may have happened? Thanks
Well the first steps are to:
I spent the time to download your video and reviewed it twice before posting my suggestion of compiling and uploading a blank project to ensure your Display is not screwed.
If you can first ensure that your display is still functional, that is a good starting point.
If the display is NOT functional, it is hard to proceed on anything other than opening a Support Ticket
After you make sure your display is still functioning, then
- when you changed the baud rate,
did you issue the baud command to the Nextion (holds true until power reset)
or did you issue bauds (sets the value as the new default baud rate)
What was the reply code response from the Nextion when you issued the baud change
0x11 0xFF 0xFF 0xFF -- invalid baud rate value
0x00 0xFF 0xFF 0xFF -- invalid instruction
0x01 0xFF 0xFF 0xFF -- instruction accepted as okay
or perhaps another reply code response
Enjoy the long weekend. I'll check back in on Tuesday as well.
tried the blank page this morning but still flashes like shown in the video. I guess its dead?
Before declaring it as dead
Check your power supply with a known good 5V (sometimes low power causes issues).
Use the adapter that came with the Nextion Display
Finally before declaring it dead, open a support ticket