Temboo, Dropbox & Blynk - A Free Combination For Makers

// Sketch to upload pictures to Dropbox when PUSHBUTTOM IN BLYNK is pressed
// be aware that temboo will permit till 250 calls to Temboo per calendar month in the free plan.


#include <Bridge.h>
#include <Process.h>
#include <BridgeClient.h>
#include <BridgeServer.h>
#include <BlynkSimpleYun.h>

//Blynk authorization code for the Blynk
char auth[] = "YOUR AUTHO TOKEN OF YOUR BLYNK PANEL";

// Picture process
Process ProcesoLinino;

// Filename
String filename, file_ino;

// Pines
int hacerfoto = 8; //When it is ON we take the picture
int pin13 =13; //only for diagnostics

// Path
String path = "/mnt/sda1/";   //SD card root in the YUN

// To define the variables for the LEDs on the Blynk panel
// They will be activated through the Arduino sketch and Blynk // will update their states

//****************************************************************************************************
// Meaning of the LEDs widges with:
//*********************************
// led1 will be solid when the command fswebcam is sent to 
// Linino to take the picture.

// led2 will be solid when we call the phyton script to upload // the taken picture to DropBox

// led3 will blink as an indicator of Arduino YUN is running // and there is comunication with Blynk

    WidgetLED led1(V1);     
    WidgetLED led2(V2);
    WidgetLED led3(V3); 
//****************************************************************************************************

void setup() {
  Serial.begin(9600);
  file_ino="yun_camera060317.ino";
  
  // Bridge takes about two seconds to start up
  // it can be helpful to use the on-board LED
  // as an indicator for when it has initialized  pinMode(13, OUTPUT);
  digitalWrite(13, LOW);
  Serial.println("Sent auth to Blynk...");
  Blynk.begin(auth);//Sent auth to Blynk...
  Serial.println("Activating Bridge to Linino.......");
  Bridge.begin();//Activating Bridge to Linino.......
  digitalWrite(13, HIGH);
  // Set pin mode
  pinMode(hacerfoto,INPUT);
  Serial.print("Fichero INO -->  ");
  Serial.println(file_ino);
  delay(3000);
}

void loop(void) 
{
 // Initialize the client library for Blynk
  Blynk.run();
  Serial.println("Blynk running....");
  digitalWrite(13, LOW);
  led3.setValue(255);
    if (digitalRead(hacerfoto) == HIGH) 
    {
                // To create filename as the retuned value of timeStamp.
                filename = "";
                Serial.print("1. To name the picture file as the timestamp  ");
                digitalWrite(13, LOW);
                ProcesoLinino.runShellCommand("date +%s");
                while(ProcesoLinino.running()); //Waiting while ProcesoLinino to get the timestamp is running
                led3.setValue(0);
                Serial.print("2.Returned code after Process completed. 0 is OK, any other number when there was a failure....   ");
                Serial.println(ProcesoLinino.exitValue());////////////////
                while (ProcesoLinino.available()>0) { //While there are values returned by the process, in this case the instance of the process returns an String with the timestamp.
                char c = ProcesoLinino.read();
                filename += c;
                } 
                filename.trim();
                Serial.println(filename);
                filename += ".png";   //Filename is composed including its extension
                
                ////INSTEAD TO UPLOAD MANY FILES WITH TIMESTAMP AS FILENAME DUE TO DELETE THEM AT DROPBOX IS DIFICULT, I OVERWRITE THE FILENAME TO A FIX NAME.
                filename = "FOTOYUN.png";
                
                // Mount the SD
                ProcesoLinino.runShellCommand("cd  /mnt/sda1");
                Serial.print("3.Returned code after request change directory where the SD card is....  ");
                Serial.println(ProcesoLinino.exitValue());////////////////// 
                led3.setValue(255);
                
                // Take picture 
                Serial.println("3.To send the comand fswebcam to Linino to take the picture , store the picture at the desired path and filenam and also adjusting its resolution");
                digitalWrite(13, HIGH);
                led1.setValue(255);
                led3.setValue(0);
                ProcesoLinino.runShellCommand("fswebcam " + path + filename + " -r 1280x720");
                while(ProcesoLinino.running()); //Waiting while ProcesoLinino to get the picture... fswebcam... is running
                digitalWrite(13, HIGH);
                Serial.print("4.Returned code after running fswebcam command is....  ");
                Serial.println(ProcesoLinino.exitValue());//////////////////////////////////////////////
                digitalWrite(13, LOW);
                led3.setValue(255);
                led1.setValue(0);
                
                // Upload to Dropbox
                led2.setValue(255);
                Serial.println("5.To upload to Dropbox, a python scrip is ran by the Linino");
                digitalWrite(13, LOW);
                ProcesoLinino.runShellCommand("python " + path + "upload_picture.py " + path + filename);
                while(ProcesoLinino.running());
                led3.setValue(0);
                Serial.println("6.Returned code after ran the python script that upload the filename to Dropbox....    ");
                Serial.println(ProcesoLinino.exitValue());//////////////////////////////////////////////
                led2.setValue(0);
                led3.setValue(255);
                Blynk.email("emailto@gmail.com",filename,"https://www.dropbox.com/home/Aplicaciones/mmc2vlcAPP1"); // An email is sent after uploading the picture to Dropbox by using Blynk.
                delay(5000);
                led3.setValue(0);
                delay(5000);
                led3.setValue(255);
                delay(5000);
                led3.setValue(0);
                delay(5000);
                led3.setValue(255); //THESE LINES ARE JUST TO CREATE THE BLYNKING EFFECT OF THE LED3 AS A WATCHDOG LED
                delay(5000);
                led3.setValue(0);
                delay(5000);
                led3.setValue(255);
                delay(5000);
                led3.setValue(0);
                delay(5000);
              
      }
        else
        {
        Serial.println("Awaiting for user to press the Blynk buttom remotelly.................");
          
          }

      led3.setValue(255);
      delay(2000);
      led3.setValue(0);
      delay(2000);        
          
            
}