[AC_Hacker]

Originally Posted by Piwoslaw

The line:

steinhart -= 273.15;

is the same as:

steinhart = steinhart - 273.15;

so this in itself is not a problem.

I think this is an illegal line... with the minus in front of the equal sign:

steinhart -= 273.15;

I you want steinhart to take the value of 273.15, you could say:

steinhart = 273.15;

I you want steinhart to take the value of -273.15, you could say:

steinhart = -273.15;

... or even:

steinhart = 273.15 * -1;

If you want to increase whatever value steinhart already has by 273.25, you could say:

steinhart = steinhart + 273.15;

If you want to decrease whatever value steinhart already has by 273.25, you could say:

steinhart = steinhart - 273.15;

& & &

The part of the program that is at the top, in other words above...

void setup()   {

... is where all variable name must be declared, or else the program will not know what the strange undefined words mean.

steinhart is a variable name and it needs to be defined as such in this section.

The middle part of the program, that is below...

void setup()   {

but above...

void loop()

Is where initial values are set... in other words, you can't assume that the first time you use steinhart that it will have a value of zero, you have to make it so.

& & & & & &

You can't expect anyone to give useful advice on a program or on what it's debugger message means unless you have quoted ALL of the program and ALL of the debugger message.

Else, you're wasting everyones time, including your own.

-AC