gistfile1.ino

//  Author:Chris Hannam
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA


// uses https://github.com/reeedstudio/libraries/tree/master/DigitalTube

#include "TM1637.h"
#define CLK A4//pins definitions for TM1637 and can be changed to other ports       
#define DIO A5
TM1637 tm1637(CLK,DIO);

String inputString = "";         // a string to hold incoming data
boolean stringComplete = false;  // whether the string is complete

void setup()
{
  tm1637.init();
  tm1637.set(BRIGHT_TYPICAL);//BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;
  Serial.begin(9600);
}

void loop()
{
    //tm1637.point(POINT_ON);
    
    if (stringComplete) {
      tm1637.clearDisplay();
      inputString.replace("\n","");
      int numbers = inputString.length();
      if (numbers == 1) {
        int f1 = inputString.substring(0,1).toInt();
        tm1637.display(3,f1);
      }
      if (numbers == 2) {
        int f1 = inputString.substring(0,1).toInt();
        int f2 = inputString.substring(1,2).toInt();
        tm1637.display(3,f2);
        tm1637.display(2,f1);
      }
      if (numbers == 3) {
        int f1 = inputString.substring(0,1).toInt();
        int f2 = inputString.substring(1,2).toInt();
        int f3 = inputString.substring(2,3).toInt();
        tm1637.display(3,f3);
        tm1637.display(2,f2);
        tm1637.display(1,f1);
      }
      if (numbers == 4) {
        int f1 = inputString.substring(0,1).toInt();
        int f2 = inputString.substring(1,2).toInt();
        int f3 = inputString.substring(2,3).toInt();
        int f4 = inputString.substring(3,4).toInt();
        tm1637.display(3,f4);
        tm1637.display(2,f3);
        tm1637.display(1,f2);
        tm1637.display(0,f1);
      }
      
    }
    
    delay(500);
}

void serialEvent() {
  while (Serial.available()) {
    // get the new byte:
    char inChar = (char)Serial.read(); 
    // add it to the inputString:
    inputString += inChar;
    // if the incoming character is a newline, set a flag
    // so the main loop can do something about it:
    if (inChar == '\n') {
      stringComplete = true;
    } 
  }
}