FinalCodeEdit

// scrolltext demo for Adafruit RGBmatrixPanel library.
// Demonstrates double-buffered animation on our 16x32 RGB LED matrix:
// http://www.adafruit.com/products/420

// Written by Limor Fried/Ladyada & Phil Burgess/PaintYourDragon
// for Adafruit Industries.
// BSD license, all text above must be included in any redistribution.

float tempC;
int tempPin = A5;



#include <Adafruit_GFX.h>   // Core graphics library
#include <RGBmatrixPanel.h> // Hardware-specific library


#define CLK 8  // MUST be on PORTB! (Use pin 11 on Mega)
#define LAT A3
#define OE  9
#define A   A0
#define B   A1
#define C   A2
// Last parameter = 'true' enables double-buffering, for flicker-free,
// buttery smooth animation.  Note that NOTHING WILL SHOW ON THE DISPLAY
// until the first call to swapBuffers().  This is normal.
RGBmatrixPanel matrix(A, B, C, CLK, LAT, OE, false);
// Double-buffered mode consumes nearly all the RAM available on the
// Arduino Uno -- only a handful of free bytes remain.  Even the
// following string needs to go in PROGMEM:

#define STRING_SIZE 32

char str[STRING_SIZE];  //the string to scroll
char tempBuffer[8];     //storage for the temperature substring

int    textX   = matrix.width(),
       textMin = sizeof(str) * -12,
       hue     = 0;


void setup() {
  matrix.begin();
  matrix.setTextWrap(false); // Allow text to run off right edge
  matrix.setTextSize(2);

  Serial.begin(9600); //opens serial port, sets data rate to 9600 bps

}
uint32_t  temptimer = millis();
void loop() {
  byte i;

  if ((millis() - temptimer) > 3500)
  {
    temptimer = millis();
    tempC = analogRead(tempPin);           //read the value from the sensor
    tempC = (5.0 * tempC * 10.0)/1024.0;  //convert the analog data to temperature
    Serial.print(tempC);                  //send the data to the computer


    snprintf(str, STRING_SIZE-1, "Current Temperature is %sC", dtostrf(tempC, 6, 2, tempBuffer));

  }
  // Clear background
  matrix.fillScreen(0);

  matrix.setTextColor(matrix.ColorHSV(hue, 255, 255, true));
  matrix.setCursor(textX, 1);
  matrix.print(str);

  // Move text left (w/wrap), increase hue
  if((--textX) < textMin) textX = matrix.width();
  hue += 7;
  if(hue >= 1536) hue -= 1536;

  // Update display
  matrix.swapBuffers(false);
  delay(15);
}