map and smooth functions questions...

Projects Programming
5

be aware that the map() function will not guard against out of range values

simple example that show Celsius to Fahrenheit conversion

//
//    FILE: mapC2F.pde
//  AUTHOR: Rob Tillaart
//    DATE: 2012=NOV-04
//
// PUPROSE: showing that map() works outside of ranges provided
//

void setup()
{
  Serial.begin(9600);
  Serial.println("start...");
}

void loop()
{
  for (int i=-100; i<200; i++)
  {
    Serial.print(i);
    Serial.print(":");
    Serial.println(map(i,0,100,32,212));
  }
  while (1);
}

SO: if the getTempC() returns an errorcode say -1000 , the map() function will just do its math, returning => -1768F :wink:

Use constrain() to constrain a value between two values