How to connect TFT screen (ST7735S) to Arduino?

Question

I'm learning to work with Arduino and I decided to work with a TFT display (driver ST7735S, I connect to Arduino Uno), but I encountered a problem in the form that my contacts are labeled differently than in all the examples I looked at (example - no MOSI contacts/ MISO and CLK, instead of BL - BLK), because of which I am confused and cannot connect the screen correctly - please, help)

Display photo:

Main

Driver

• jsotola: what are the pin labels?... you only said what they are not, which is not very useful ... please update you post

Answer 1

Connections

Connections as follows:

• BLK -> 5V
• CS -> D10 (or anything, i.e. D9 - just change the #define below)
• DC -> D9 (or anything, i.e. D8 - just change the #define below)
• RST -> D8 (or anything, i.e. D7 - just change the #define below)
• SDA -> D11
• SCL -> D13
• VDD -> 5V
• GND -> GND

Using TFT library

You can use the TFT library:

#include <TFT.h> 
#include <SPI.h>

With the following #defines:

#define CS 10
#define DC 9
#define RST 8

Note: if you used different pins, then just change the numbers.

Create an instance and initialise with:

TFT myDisplay = TFT(CS, DC, RST);
myDisplay.begin();

Using GFX

#include <Adafruit_GFX.h>
#include <Adafruit_ST7735.h>
#include <SPI.h>

With the following #defines:

#define CS 10
#define DC 9
#define RST 8

Note: if you used different pins, then just change the numbers.

Create instance¹:

Adafruit_ST7735 myDisplay = Adafruit_ST7735(CS, DC, RST);

Initialise with

myDisplay.initR(INITR_BLACKTAB);

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Further reading

• Beginner Arduino - Using a 1.8 Inch TFT Display
• Guide to 1.8 TFT Display with Arduino

Footnote

¹ Alternative instance creation, which is slower, but you can use different MOSI/SCLK pins (hence the additional #defines):

#define SCLK 13 // You can change this
#define MOSI 11 // You can change this
Adafruit_ST7735 myDisplay = Adafruit_ST7735(CS, DC, MOSI, SCLK, RST);