Trying to use oF and oC on my display...

[sjmusic2]

I am trying to include temp probe data converted to oC in addition to my oF already displayed and it feels like it should be very easy but I can't seem to figure it out !

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int T2C;
float T2C2;

void DrawCustomMain()
{
T2C=ReefAngel.Params.Temp2;
T2C2=((float)T2C-32.0)*0.56;
ConvertNumToString(text, T2C2, 10);
ReefAngel.LCD.DrawText(T2TempColor,DefaultBGColor, 95, 65, T2C2);
}

Thanks in advance.

[binder]

If you are using 0.9.X libraries, you have to use this:

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ReefAngel.Params.Temp[T2_PROBE];

This is what we use when we convert from C to F initially:

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Temp = Temp * 1.8 + 320;

You also must remember that the value stored in the Temp variable does not contain a decimal point. So 80.0 is actually stored as 800. You code would need to look like this:

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T2C2 = ((float)T2C-320)*0.56;

It may need to be tweaked a little more, but that should get you going.

[sjmusic2]

I'm not using 0.9 yet, so this is where I ended up...just posting for reference (I added a degree graphic with PutPixel as I'm unaware of a font charcter already in existance) :

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int T2C;
int T2C2;

//This is inserted into DrawCustomMain...

//Convert and display LED array in Celsius
T2C=ReefAngel.Params.Temp2;
T2C2=((float)T2C-320)*0.56;
ConvertNumToString(text, T2C2, 10);
ReefAngel.LCD.DrawText(COLOR_OLIVEDRAB,DefaultBGColor, 95, 79, text);
ReefAngel.LCD.DrawText(COLOR_OLIVEDRAB,DefaultBGColor, 70, 79, "C");
ReefAngel.LCD.PutPixel(70, 66, 79);
ReefAngel.LCD.PutPixel(70, 67, 79);
ReefAngel.LCD.PutPixel(70, 65, 80);
ReefAngel.LCD.PutPixel(70, 65, 81);
ReefAngel.LCD.PutPixel(70, 66, 82);
ReefAngel.LCD.PutPixel(70, 67, 82);
ReefAngel.LCD.PutPixel(70, 68, 80);
ReefAngel.LCD.PutPixel(70, 68, 81);

I could probably have done the conversion in one step to save code, but I have plenty of free space so I made it easier to read instead

[binder]

I forgot I had this stuff inside the libraries...

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#define CONVERT_TO_C(x)	((x) - 320)/1.8
#define CONVERT_TO_F(x)	((x) * 1.8) + 320

it could be simplified or changed so there's no division being performed, but still.
You could then use:

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T2C2 = CONVERT_TO_C(ReefAngel.Params.Temp2);

Then the compiler would handle all the code behind the scenes.

[sjmusic2]

Just saw this new info, thanks, every byte saved is much appreciated

[binder]

Just saw this new info, thanks, every byte saved is much appreciated

Cool.