home automation with arduino and android

you can find an example of arduino sketch at the first page of this post, let me know

Hi got my uno today, all connected up have it conected to the network. I put the scetch you posted on the first page and i get the error on the line

readString.append(c);

'class string' has no member named 'append'

any ideas?

Thanks

Adam

Which version of the IDE are you using? Take a look on this

Looms really good!
What code did you use for the computer interface?
I'd love to build something like this, but I would have
no idea how to intergrate it into the computer.

the interface has been developed for android device, so it has been build in JAVA, full code is available on github

Thanks got rid of the error but now means the wont sync with my android :-/

I guess ill have to start writing from scratch then...

Thanks Adam

before to use the android app test the http call through a web browser...you should see the json message on it

Thanks mate.

Im finding it really hard to see whats what in the script so i might have to have a go at starting from scratch....

of course, some basic programming skills are needed to better understand it, let me know!

Hi there, with this sample you should be able to turn on/off a light, i'm posting this beacuse an user of this forum asked me how to make it and i thought it was nice sharing this with all the people.

#include <SPI.h>
#include <Ethernet.h>

#define action_none -1
#define action_out_all 0
#define action_on_light 1
#define action_off_light 2

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xBE }; //physical mac address
byte ip[] = { 192, 168, 1, 16 };                  // ip address
byte gateway[] = { 192, 168, 1, 1 };                  // internet access via router
byte subnet[] = { 255, 255, 255, 0 };                   //subnet mask
Server server(80);                                      //server port
String readString = String(30); //string for fetching data from address

// arduino out
int pinOutPlight = 4;


// incoming GET command  
String r_pinOnLight = "GET /?out=4&status=1";
String r_pinOffLight = "GET /?out=4&status=0";
String r_out_all = "GET /?out=all";

// current action
int current_action;

void setup(){
  //start Ethernet
  Ethernet.begin(mac, ip, gateway, subnet);
  delay(1000);

  pinMode(pinOutPlight, OUTPUT);    
  digitalWrite(pinOutPlight, LOW);
  //enable serial datada print  
  Serial.begin(9600);
  current_action = -1;
}
void loop(){
  current_action = -1;

  // Create a client connection
  Client client = server.available();
    if (client) {
      while (client.connected()) {
       if (client.available()) { 
        char c = client.read();
        //read char by char HTTP request
        if (readString.length() < 30) 
        {
          //store characters to string 
          readString = readString + c;
        }  
        //output chars to serial port
        //Serial.print(c);
        //if HTTP request has ended
        if (c == '\n') {

         Serial.print(readString);
         // ****************************************************
          if(readString.startsWith(r_pinOnLight))
          {
          Serial.print("\n ON UP \n");
          current_action = action_on_light;
          }
          else if(readString.startsWith(r_pinOffLight))
          {
           Serial.print("\n OFF UP \n");
           current_action = action_off_light;               
          }
          else if(readString.startsWith(r_out_all))
          {
            Serial.print("\n ALL\n");
            current_action = action_out_all;
          }
          else
          {
            Serial.print("\n None \n");  
            current_action = action_none;
          }
         // ****************************************************  
          // now output HTML data starting with standart header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println();
         char buf[12];               
         switch(current_action)
         {
         case action_out_all:
            client.print("{\"ip\" : \"192.168.10.16\", \"devices\" : [{ \"type\" : \"light\", \"name\" : \"your name\", \"out\" : \"");           
            client.print(pinOutPlight);
            client.print("\"}");                        
            client.print("]}");                      
           break;
         case action_on_light:
           digitalWrite(pinOutPlight, HIGH);
           client.print("{\"status\" : \"1\" , \"out\" : \""); 
           client.print(pinOutPlight);
           client.print("\"}");                           
           break;           
         case action_off_light:
           digitalWrite(pinOutPlight, LOW);
           client.print("{\"status\" : \"0\" , \"out\" : \""); 
           client.print(pinOutPlight);
           client.print("\"}");                 
           break;
         default:
           current_action = action_none;         
         }


         // ****************************************************             

          //clearing string for next read
          readString="";
          //stopping client
          client.stop();
        }
      }
    }
  }
}

you have to change your ip in the sketch. It's just a demo, any improvement are welcome.

If someone has downloaded my app and played a bit with arduino and this stuff you should vote my project on MAKE

Thanks!

This post started out with the premise that other home automation systems are too expensive. Aren't X10 systems pretty cheap ($99 for controller and software)?

One issue with X10 is that they require a computer with X10 controller on 24/7. The computer provides a web interface and can turn devices on/off at scheduled times. For example, you may want to switch an outside light on automatically at 7 PM every day.

Have you given any thought to a server solution, i.e. leaving an android device at home and on 24/7 that can be connected to remotely?

Hello!

I try to get this to work with the 28J60 Ethernet Shield.

But i get error in the android APP "An error has accoured, check your internet connection. Is Arduino Alive?"
It all works, i get "my item" and i can controll the arduino output from the app.
The only problem seems to be with the JSON from the arduino to the android app. When i test in my web browser its look like this:

//arduinoIP/?out=5&status=0
-> {"status" : "0" , "out" : "5"}
//arduinoIP/?out=5&status=1
-> {"status" : "1" , "out" : "5"}

What can be wrong?

 if (strcmp(params, "?out=all") == 0)
  
         {
           e.print("{\"ip\" : \"192.168.0.15\", \"devices\" : [{ \"type\" : \"plug\", \"name\" : \"LAMPA\", \"out\" : \"");          
           e.print("5\"}");            
           e.print("]}");       
           e.respond();
          Serial.println("OUTALL!!");
        } 

 if (strcmp(params, "?out=5&status=0") == 0)
       { 
           digitalWrite(pinOutRelay, LOW);
             Serial.println("OUT LOW!!");
            e.print("{\"status\" : \"0\" , \"out\" : \"");
            e.print("5\"}");   
            e.respond();  
           Serial.println("LOW!!");   
      }

 if (strcmp(params, "?out=5&status=1") == 0)
     { 
           digitalWrite(pinOutRelay, HIGH);
           Serial.println("OUT HIGH!!");
           e.print("{\"status\" : \"1\" , \"out\" : \"");
           e.print("5\"}");    
           e.respond();
           Serial.println("HIGH!!"); 
     }

Edit: I found the error :slight_smile:
I had a old DomoticHome APP installed . It work perfect with the app from market.

Can we also make an automated 'assisstant robot'? I need it to complete my homework :stuck_out_tongue:

I think it can be used for this too, if you use as "type" something like "plug" or "light" you'll have 2buttons (on/off). let me know

I had lot of mail last months, all with the same question: "how can i write the code for arduino?" down here the answer :slight_smile:

Just deployed a web app to generate automatically the code for arduino

http://domotichome.heroku.com/masters

it's in beta, please don't link it in other site because it will be moved from there.

Hope it will be helpful!
Please report bugs.

This is some fantastic stuff that you're doing and I really hope you continue to develop it.

I had a bit of trouble with the code that your creator made. It didn't seem to work, I couldn't get my Android to sync.

When I used that simpler light one that you posted on the 2nd or 3rd page that worked well. At least, I could switch the light on but not off.

The Android app is a little buggy and needs some work but it's a solid start. I've had a little bit of experience with electronics, I'm an avid Arduino user and a beginner with the programming. Keep up the good work, this will be a great project to follow.

Thanks.

@Arduino-Idea you are totally right i just fixed some stuff, try again please you can see what it's generated by the sync command typing in your browser
http://yourip/?out=all

let me know

Hi there, thanks for that.

I have tested it again and your code generator seems to work for me now.

I am using a Nexus One over 3G and can sync your app with my Arduino which listed the test LED for me.

The only issue I'm having is that when I try and use the lock or unlock buttons (LED on/off I'm assuming), I get an error saying:

"An error has occurred, check your internet connection. Is Arduino alive?"
(nothing appears in the serial monitor)

I can create an action using the LED which allows me to switch the LED on successfully but I can't see anyway to turn it off. The following appears in the serial monitor each time I press the action button in the app.

GET /?out=5&status=1 HTTP/1.1
5 HIGH

I have confirmed that everything is working by using the URL's to switch the LED on and off through my browser both locally on my PC and also over 3G on the phone browser.

I can see so much potential with this project, thank you so much for sharing it and spending so much time on it.

I'm getting confused