Degrees C Symbol

[richardmckenna]

Hi all,

I can't seem to find the answer to this anywhere. I'm using the Arduino API and trying to display the degrees C symbol eg 5.2ºC in M5.Lcd.printf("%0.1f%cC", temp, (char)000) but can't for the life of me find what number I need for (char)000

Can anyone help?

[m5stack]

@richardmckenna The character " ° " is not in the range of ASCII code. So it cannot be displayed, maybe you can try to use " 'C " symbol instead, it will look more same

[richardmckenna]

@m5stack hmmm ok that's a shame.

I don't suppose you can suggest any other way of displaying it? Would have thought it was a common thing to do given temperature applications are a popular thing for this kind of hardware.

Is there any documentation on what characters are available? Or is it just the standard ASCII set but not the extended set?

[m5stack]

@richardmckenna You can refer to this Unicode example, but in fact it still does not support displaying " ° ", but will be able to display more characters. Please pay attention to the content of the notes when using.

Github link: https://github.com/m5stack/M5Stack/tree/master/examples/Advanced/Display_Unicode

[richardmckenna]

@m5stack Thank you I will take a look.

[world101]

I manually create the degree symbol by drawing a white circle and then a smaller black circle on top. But it takes some trial and error depending on your text size.

[richardmckenna]

@world101 thanks. I think I will do this.

[peter153]

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[peter153]

This post is deleted!

[peter153]

//Fake degrees C Symbol

String strTemp;
strTemp = String(temp1 + strtof(&adj1[0], NULL));
strTemp += " C";

M5.Lcd.drawCentreString(strTemp,320/2,50,1);
//M5.Lcd.print(String(temp1 + strtof(&adj1[0], NULL))+"℃"); //broken --;

int nTempLen=strTemp.length();
M5.Lcd.setTextSize(1);
M5.Lcd.setCursor(2, 50);
M5.Lcd.print("Sensor");
M5.Lcd.print(" 1");
if(nTempLen==6)
{
M5.Lcd.setCursor(195, 45);
}
else if(nTempLen==7)
{
 M5.Lcd.setCursor(205, 45);
}
else if(nTempLen==8)
{
 M5.Lcd.setCursor(216, 45);
}
else
{
 M5.Lcd.setCursor(200, 45);
}

M5.Lcd.setTextSize(2);
M5.Lcd.print("o"); //lowcase o

[world101]

Just an update. I noticed that uiFlow now supports Unicode characters. I'm not sure in which release it was introduced, but I'm now able to add the degree symbol to a label using characters from this site.

Two drawbacks...

• Size is fixed at unicode 24 (similar in size to DejaVu 24).
• Unicode 24 is missing from the label set font block