digispark-temp.c

#include <DigiCDC.h>

// the setup routine runs once when you press reset:
void setup() {    
  SerialUSB.begin();
  // initialize the digital pin as an output.
  pinMode(1, OUTPUT); //LED on Model A   
}

int get_temp() {
  analogReference(INTERNAL1V1);
  int raw = analogRead(A0+15); 
  /* Original code used a 13 deg adjustment. But based on my results, I didn't seem to need it. */
  // raw -= 13; // raw adjust = kelvin //this value is used to calibrate to your chip
  int in_c = raw - 273; // celcius
  analogReference(DEFAULT);
  return in_c;
}

char msg[128];

// the loop routine runs over and over again forever:
void loop() {
  // turn the LED on (HIGH is the voltage level)
  digitalWrite(1, HIGH);
  SerialUSB.delay(500);
  //delay(1000);               // wait for a second
  // turn the LED off by making the voltage LOW
  digitalWrite(1, LOW); 
  //delay(1000);               // wait for a second
  SerialUSB.delay(500);
  sprintf(msg, "temp: %d\r\n", get_temp());
  SerialUSB.print(msg);
  SerialUSB.refresh();
}