Feather Huzzah ESP8266 with ILI9341 Screen

Other Hardware Displays
1

Hi all,

Looking for a bit of help if i can.

I have an Adafruit Feather Huzzah ESP8266 which i'm trying to hook up to an SPI screen from Amazon ( https://www.amazon.co.uk/gp/product/B08HH7SXJW/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 )

The code i'm using works fine when connected to a 2.4" Adafruit Featherwing screen but when i try and hook it up to the no-brand screen i'm only getting a white screen, i'm guessing i'm not connecting to the right pins but this being my first time out on this i'm hoping someone can point me in the direction

IMG_20220110_134042
IMG_20220110_1340421920×1440 356 KB

Here's a picture of the boards in question, VCC and LED i'm connecting to the 3.3v pin on the board, GND to GND.

The top of the code is attached which where i guess i've got the issue. The screen is labelled as SCK, SDI (MOSI), D/C and CS, where as the pins in the code are STMPE_CS, TFT_CS, TFT_DC and SD_CS. I'm assuming its just a matter of knowing which one connects to which?

#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <gfxfont.h>


   #define STMPE_CS 16
   #define TFT_CS   0
   #define TFT_DC   15
   #define SD_CS    2


Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

Any assistance would be much appreciated.

2

Adafruit are not stupid. They know that Chinese Red SPI displays do not have a pullup on TFT_RST. So their code will fail on the Chinese displays.
Genuine Adafruit displays do have a pullup.

If you use the full-fat constructor everything should work.
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

David.

3

Thanks David, so for that will i need to set another pin high and plug that one into the reset on the TFT? (sorry for the stupid questions, first project so i'm driving blind!)

4

You don't set anything.
You connect a jumper cable from TFT_RST on the Display to a spare pin on the Arduino.
#define TFT_RST this_Arduino_pin_number

This is not rocket science. You have already connected the Adafruit display successfully.

5

Got there eventually!

The adafruit display plugs directly into the feather so no wiring required. When i was connecting to the red board i was using the wrong pins. Reconnected everything along with the reset as per yours and its fired up

Thanks for the help