2.8" tft cap. touch versions problems Moderators: adafruit_support_bill, adafruit

[Jonaczt]

HI,

My company recently purchased new stock of adafru.com/product/1947. However, when we attached the new ones to the MKR ZERO board and it didn't do anything other than turn on the backlight. When I use the Arduino UNO the projects run normally. So, I took a look and found that IOREF must be shorted with 3V pin. Nevertheless, it still no working.

When I used the version v. 2.3 the display worked!!! Additionally, I can not find a version number on the new display board.

I was wondering if this would be a hardware or software issue?

Thanks

[mikeysklar]

Hello Jonaczt,

We have had quite a few posts recently on this topic. Please let me know if this solution also works for you. I do not know where the version number of the board is located.

viewtopic.php?f=47&t=148262&p=771877&hilit=2.8+tft+mkr#p771877

This version (Adafru~1) has the 2X3 header as a default to use SCK, MOSI and MISO pins, while the older version (v2.3) had those pins already connected to the peripheral single row pins.

Therefore, for the latest version I did this: (refer schematic ADAFRU~1 2019-09-17 10:57AM):

Connected the pin closest to the pin 3 of MIC5225-3.3, to 3.3V (since I am using MKR Zero)
Left the pin IOREF/VCCIO open
Left the adjacent 3V pin open
Soldered together all three positions of IOREF
Closed SJ1, Closed SJ2, Closed SJ3