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Nextion not reading card?

Posted: Thu Feb 07, 2019 5:11 pm
by kp4djt
I have taken a couple of SD cards and reformatted them to FAT32. Placed the MMDVMHost/Nextion_G4KLX/ tft file, the one for the screen I have, a NX3224K024, on the SD cards (a 2G and a 16G) insert card into screen and all I see is:
Baud: 9600
SD Card Update.....

Unless it takes and extra ordinary amount of time to read even at 9k6b/s it should after a while clear and I believe as I understood, go to the screen on the new file. At that rate if my numbers are correct it should take about 12 minutes to load the file.

Any ideas of what maybe wrong ? If I power it down and remove the card, the power it up it goes back to the original screens with animations etc. I even removed the two data lines to make sure that was not going to cause an issue.

Re: Nextion not reading card?

Posted: Fri Feb 08, 2019 2:24 am
by N3MNT
Do you have the data lines disconnected ( only power and ground).

Re: Nextion not reading card?

Posted: Sat Feb 09, 2019 1:55 am
by kp4djt
I had not seen that the first few times I tried it, the I found the place where it said to have them disconnected, I did so but still no joy. Perhaps I messed something up and need to reset the thing?

I am going to try the one on a stand alone PI and see if that works, but It would not read the SD card. It did recognize there was a card in there but never got beyond the reading screen.

Re: Nextion not reading card?

Posted: Sat Feb 09, 2019 5:33 pm
by W1KMC
I found on my NX3224K024_011 screen that it does not like Class 10 (High Speed) cards, The class 4 works fine (small number in circle on the SD Card - you may need a magnifier to see them -- a U1 and Class 10 are the same for speed, so stay with the Class 4 and it should read just fine. If not, you're no worse for wear.

Re: Nextion not reading card?

Posted: Tue Feb 12, 2019 7:56 am
by kp4djt
For some reason it would not take a card unless I had formatted it using Win10. I was doing the format using Linux and formatting to Fat32 using Gparted. but that would not work, so re-looked at the docs it said to format with Windows... OK, I will do so. Formatted the card, then I moved it over to the linux
box where the tft file was for the Nextion, put the file on the card and stuck it in the Nextion, it took of and sucked up the file and displayed MMDVM on it so got that done. Now to figure out why the dual hat modem does not talk to the screen.

Re: Nextion not reading card?

Posted: Tue Feb 19, 2019 2:29 am
I had similar issues

The display will only read old SD cards.

I had to scrape around and find one in an old "action camera" I bought about 4 years ago.

I'm a bit concerned my Nextion may be a clever fake, as I can't find any information elsewhere where it says they only accept old / slow SD cards

Re: Nextion not reading card?

Posted: Sat Apr 13, 2019 7:34 pm
by WM3M
I found same thing, had to use class 4 card, tried several newer U1 cards they would not work. Also, had to use windows 10 to format card and then copy the file onto the SD card. Once I did this it worked.
Emory WM3M