How set ° symbol in drawString

[brightproject]

I'm using sprites

LGFX Lcd;
LGFX_Sprite draw(&Lcd);

draw.setFont(&fonts::FreeSansBold24pt7b);
draw.drawString("HDG" + "°", x, y);

The degree symbol isn't displayed; the library doesn't accept the encoding.

I found the only clue in font 16.

LovyanGFX/src/lgfx/Fonts/Font16.h

Line 17 in 5438181

#define TFT_ESPI_GRAVE_IS_DEGREE

But I don't use this font.

How do I display UTF-8 or ASCII characters correctly?

[tobozo]

hi,

TomThumb has the degree symbol at 0xB0 if you enable the extended ascii set.

char degree_sym = { 0xB0, 0x00 }; // extended ascii
tft.setFont(&fonts::TomThumb);
tft.printf("The temp is 20 %s\n", degree_sym);

However if you paste the degree symbol in your code, it'll probably be its utf8 representation (0xC2B0) and won't be matched in the TomThumb font set, it will only work a unicode font. Fortunately u8g2 has plenty of those.

tft.drawChar( 0xC2B0, x, y, &MyUnicodeFont )

[brightproject]

Fortunately u8g2 has plenty of those.

Unfortunately, I couldn't do it using char.

draw.drawChar( 0xC2B0, x, y, &MyUnicodeFont )

It complains that the function requires 7 elements, but I only provided 4.

  draw.setTextDatum (MC_DATUM);
  draw.setFont(&fonts::FreeSansBold12pt7b);
  
  draw.setTextColor(TFT_LIGHTGRAY);
  draw.drawString("HDG", 150, 105); // LEFT-RIGHT, UP-DOWN

  draw.setTextColor(TFT_ORANGE);
  draw.drawString("HDG", 152, 106); // LEFT-RIGHT, UP-DOWN
  draw.setFont(&fonts::DejaVu72); // The biggest font I found

  draw.setTextColor (TFT_LIGHTGRAY);
  draw.drawString(String(heading), px0, py0);

  String degreeSymbol = String((char)0xC2) + String((char)0xB0); // Degree symbol
  draw.drawString(degreeSymbol, px0 + 70, py0 - 11, &fonts::lgfxJapanMinchoP_40); // LEFT-RIGHT, UP-DOWN

  draw.setTextColor (TFT_YELLOW);
  draw.drawString(String(heading), px0 + 2, py0 + 2);
  draw.drawString(degreeSymbol, px0 + 71, py0 - 10, &fonts::lgfxJapanMinchoP_40); // LEFT-RIGHT, UP-DOWN

It turned out pretty well🙂

[tobozo]

putting the whole japanese font on the flash just for a symbol seems a bit overkill, but this character is cursed so anything goes :)