Adafruit GFX and '\n'

Projects General Guidance
1

On Adafruit GFX, I can't print a \n using .print,why i dont use println is i want it jumps to new line only it reads a '\n' in the String. It looks like only println produces newline on GFX

2

Post your code and a photo that shows the result. Why use String?

Here is a short sketch using Adafruit GFX and Adafruit_ST7735 with an Uno and 128 x128 color TFT (ST7735 controller) that uses \n to print on a new line. As you can see by the photo, the code does that just fine.

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>

const byte TFT_CS = 6;
const byte TFT_RST = 7;
const byte TFT_DC  = 8;
uint16_t backgroundColor(ST7735_BLACK);

Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS,  TFT_DC, TFT_RST);

void setup()
{
   Serial.begin(115200);
   
   tft.initR(INITR_144GREENTAB);
   tft.setRotation(2);
   tft.fillScreen(backgroundColor);
   //tft.fillScreen(backgroundColor);
   tft.setCursor(0, 20);
   tft.setTextColor(ST7735_WHITE);
   tft.setTextSize(1);
   
   tft.print("Temperature \n");
   tft.print("new line of text");
}

void loop()
{

}

20221127_153634
20221127_1536341920×2560 344 KB

3

at first, my string is coming from Serial (sender uses Serial.println())
and reciever uses (String s = Serial.readStringUntil('\n'); )

But when using write,it doesnt have newlines

4

From Serial.readStringUntil() - Arduino Reference

Notes and Warnings

The terminator character is discarded from the serial buffer.