Arduino Controller android app

@ grim - Thanks for your comment! Glad i could help.

@ SamuelFreeman - Coding for arduino is easy when compared to android! It took me days to get it working. For now i made two apps, one to control a arduino connected to my heating system (thermoduino) and this universal arduino controller. I use arduino controller to controll my somfy shades for wich i connected a 8 channel relay bord to a arduino and it works great! I have plans to make a dedicated android app to control my somfy shades.

Here is the code to control 6 relay's:

edit - code was to big??? so it is in the next post.

/*********************** Marque's Somfy Controler *****************************/
 /*
  Hardware used:
  Arduino uno
  Ethernet Shield W5100
  8 channel 5v relay
  
  */
#include <SPI.h>
#include <Ethernet.h>
#include <HTTPClient.h>

#define DEBUG1 1  //debug info

char AA =  3;     // pin connected to relay 1
char BB =  4;     // pin connected to relay 1
char CC =  5;     // pin connected to relay 1
char DD =  6;     // pin connected to relay 1
char EE =  7;     // pin connected to relay 1
char FF =  8;     // pin connected to relay 1
char II =  0;     // pin connected to relay 1


long intervalNetworkCheck = 1500;
long previousMillis = 0;
unsigned long currentMillis; 
boolean networkonline = false;
boolean DNS = false;

String sketchname = String(30);             //skech name

String readString = String(30); 

float set;
float Smin;
float Smax;
float Set;
int Ic;

byte mac[] = { 
  0xDE, 0xBD, 0xBE, 0xBF, 0xFE, 0xED };
IPAddress ip(192,168,1,69);
EthernetServer server(80);
EthernetClient client;
IPAddress Google1    (74,125,228,32 );   
//IPAddress Google2    ( 173,194,75,94);   
IPAddress ServerToCheck = Google1;             // set the name of the server to check
char dnsServerToCheck[] = "google.com";             // set the name of the server to check

char content_main_top[] = "<body bgcolor=black><font color=white><center>";
char aa[] = "A omhoog";
char bb[] = "A stop";
char cc[] = "A omlaag";
char dd[] = "B omhoog";
char ee[] = "B stop";
char ff[] = "B omlaag";
char ii[] = "info";


int pgm_lastIndexOf(uint8_t c, const char * p)
{
  int last_index = -1; // -1 indicates no match
  uint8_t b;
  for(int i = 0; true; i++) {
    b = pgm_read_byte(p++);
    if (b == c)
      last_index = i;
    else if (b == 0) break;
  }
  return last_index;
}

// displays at startup the Sketch running in the Arduino

void display_srcfile_details(void){
  const char *the_path = PSTR(__FILE__);           // save RAM, use flash to hold __FILE__ instead

  int slash_loc = pgm_lastIndexOf('/',the_path); // index of last '/' 
  if (slash_loc < 0) slash_loc = pgm_lastIndexOf('\\',the_path); // or last '\' (windows, ugh)

  int dot_loc = pgm_lastIndexOf('.',the_path);   // index of last '.'
  if (dot_loc < 0) dot_loc = pgm_lastIndexOf(0,the_path); // if no dot, return end of string

 if (DEBUG1) Serial.print("\nSketch: ");

  for (int i = slash_loc+1; i < dot_loc; i++) {
    uint8_t b = pgm_read_byte(&the_path[i]);
    if (b != 0)
    {
      sketchname.concat((char) b);
    }
    else break;
  }
if (DEBUG1) Serial.print(sketchname);

 if (DEBUG1) Serial.print(", Compiled on: ");
 if (DEBUG1) Serial.print(__DATE__);
 if (DEBUG1) Serial.print(" at ");
 if (DEBUG1) Serial.print(__TIME__);
 if (DEBUG1) Serial.print("\n");
}

/* start ethernet */
void init_eth()
{
 if (DEBUG1) Serial.println("Ethernet start");
  Ethernet.begin(mac);
  server.begin();   
 if (DEBUG1) Serial.print("IP address is ");
 if (DEBUG1) Serial.println(Ethernet.localIP());
 if (DEBUG1) Serial.print("Gateway IP address is ");
 if (DEBUG1) Serial.println(Ethernet.gatewayIP());
 if (DEBUG1) Serial.print("DNS IP address is ");
 if (DEBUG1) Serial.println(Ethernet.dnsServerIP());
}

/***  Network check ***/
void networkcheck()
{

 if (DEBUG1) Serial.println ("Network check");
  if (client.connect(dnsServerToCheck, 80))
  {
   delay(300);
  if (DEBUG1) Serial.print("connected to ");
  if (DEBUG1) Serial.println(dnsServerToCheck);
   client.println("GET / HTTP/1.1");
   client.println();
   while (client.connected())
   {
    if (client.available()) 
    {
     char c = client.read();
     if (readString.length() < 20)
    if (DEBUG1) Serial.print(c);
     {
       readString.concat(c);
     }
     if (c == '\n')
     {
       client.stop();
      if (DEBUG1) Serial.println();
      if (DEBUG1) Serial.println("DNS OK");
       DNS = true;
       networkonline = true;
       readString="";
     }
   }
   if (!client.connected()) 
   {
     client.stop();
     readString="";
   }
 }
}
if (!DNS)
{
 if (DEBUG1) Serial.println("DNS Error");
 if (DEBUG1) Serial.println("Check for IP");
  if (client.connect(ServerToCheck, 80))
  {
   delay(300);
  if (DEBUG1) Serial.print("connected to ");
  if (DEBUG1) Serial.println(ServerToCheck);
   client.println("GET / HTTP/1.1");
   client.println();
   while (client.connected())
   {
    if (client.available()) 
    {
     char c = client.read();
     if (readString.length() < 20)
    if (DEBUG1) Serial.print(c);
     {
       readString.concat(c);
     }
     if (c == '\n')
     {
       client.stop();
      if (DEBUG1) Serial.println();
      if (DEBUG1) Serial.println("IP lookup OK");
      if (DEBUG1) Serial.println("DNS not available");
       networkonline = true;
       readString="";
     }
   }
   if (!client.connected()) 
   {
    if (DEBUG1) Serial.println("Disconnecting");
     client.stop();
     readString="";
   }
 }
 }
 else
 {
  if (DEBUG1) Serial.println("Network Error");
   networkonline = false;
 }
}
}

/******** Setup *******************/

void setup()
{
 pinMode(1, OUTPUT);
 pinMode(2, OUTPUT);
 pinMode(3, OUTPUT);
 pinMode(4, OUTPUT);
 pinMode(5, OUTPUT);
 pinMode(6, OUTPUT);
 // pinMode(Heater, OUTPUT); 
  //pinMode(Buzzer, OUTPUT);

//  pinMode (Led, OUTPUT);
//  pinMode (53, OUTPUT);
  Serial.begin(9600); 
  display_srcfile_details();

  init_eth();
 // init_avviso();
  networkcheck();
  if (DEBUG1) Serial.println("Setup complete");
  if (DEBUG1) Serial.println("");
}

/****************************** Loop *****************************/

void loop() 
{
  run_eth();
  
/****Every x seconds check network conection***/
 if (!networkonline)
 {
  currentMillis = millis(); 
  if(currentMillis - previousMillis > intervalNetworkCheck)
  {
    networkcheck();
  }
}
}
/** Check fot Ethernet Client ***/
void run_eth()
{
  EthernetClient client = server.available();
  if (client)
  {
    boolean sentHeader = false;
    boolean currentLineIsBlank = true;
    while (client.connected())
    {
      if (client.available())
      {
        if(!sentHeader){
        client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println();
          sentHeader = true;
        }
        char c = client.read();
      if (DEBUG1) Serial.write(c);
 
         if (int Ih = readString.indexOf("H"));
           if(readString.indexOf("H") < 1)
       {
         readString.concat(c);
       }
        if (c == '\n' && currentLineIsBlank) {
          if (DEBUG1) Serial.println("end");
          if (DEBUG1) Serial.println(readString);
           int Is = readString.indexOf("/");
           int Iq = readString.indexOf("?");
           if(readString.indexOf("?") > 1)
           {
            if (DEBUG1) Serial.println("? found");
             int Ic = readString.indexOf("?");
             
             if (Ic > 1)
             {
               if (DEBUG1) Serial.println("c found");
               char carray[2];
               readString.toCharArray( carray,2,(Ic+1));
               int button = atoi(carray);
               switch (button) {
               case 1: 
              if (DEBUG1) Serial.println("1 found");
               action(AA,aa, client);
               break;
               case 2: 
              if (DEBUG1) Serial.println("2 found");
               action(BB,bb, client);
               break;
               case 3: 
              if (DEBUG1) Serial.println("3 found");
               action(CC,cc, client);
               break;
               case 4: 
              if (DEBUG1) Serial.println("4 found");
               action(DD,dd, client);
               break;
               case 5: 
              if (DEBUG1) Serial.println("5 found");
               action(EE,ee, client);
               break;
               case 6: 
              if (DEBUG1) Serial.println("6 found");
               action(FF,ff, client);
               break;
               case 7: 
              if (DEBUG1) Serial.println("7 found");
               action(FF,ii, client);
               break;
               }
             }
          delay(1);
             client.stop();
             readString="";
             client.read(); client.read();
           }
         delay(1);
         client.stop();
         readString="";
         client.read(); client.read();
       }
       if (c == '\n') {currentLineIsBlank = true; } 
       else if (c != '\r') { currentLineIsBlank = false;}
       //      if (client.available())
   }//    while (client.connected())
  }
     client.stop();
 }
}
/************************* Actions on web input *************************************/
void action(char XX, char* xx, EthernetClient client)
{
  if (DEBUG1) Serial.print("Action ");
  if (DEBUG1) Serial.println(xx);
  digitalWrite(XX, HIGH);
  delay (500);
  digitalWrite(XX, LOW);
  client.print (content_main_top);
  client.println(xx);
}

Marque,

I saw your sketch and it looked like it would be great for my android tablet. nexus 7

I have downloaded your latest arduino sketch from the arduino forum. (relay version)

I entered the default ip 192.168.1.69 and port 80 in the android tablet - saved the settings

I also uploaded the sketch to the aurduino
it compiled fine.

Problem:

  1. on android the top part displays webpage not found.

  2. When i look at the serial monitor, i keep getting this:

Getting IP......
My IP address: 255.255.255.255
Gateway IP address is 255.255.255.255
DNS IP address is 0.0.0.0

I have done a port forward 192.168.1.69 port 80
i am running arduino 1.02 but tried it with 1.00 with the same problem

Any suggestions how to get this working?

I use the arduino uno r3 with an ethernet 5100 shield - and it works fine with other web arduino software

Thanks
Joe

In the above sketch the fixed ip is diabled and you should get a ip by dhcp from your router. or you can try to change:
Ethernet.begin(mac);
to
Ethernet.begin(mac,ip);

Howdy Marque,

Any idea why my other pins are high? I can pop a led into any of my unused pins and the led lights up?

Very soon I'm going to buy another etherten and use the first one as a lightswitch that will send the status of the pins through to another etherten connected to my server. Server will use php to write values to a db, then switch relays accordlingly. As I'm not the best coder its a daunting task!

/*********************** Marque's Arduino Controller Example ***********************/
/***********************  for questions: marque.l@gmail.com  ***********************/
/*
In the android app settingsscreen you can set up you IP and port.
For this example you need to call prefix 1 "B" and prefix 2 "C".
*/
#include <Ethernet.h>
#include <HTTPClient.h>
#include <SPI.h>

int RecievedString;
int valueB;
int valueC;
String readString = String(20);

int rm2light1 = 4;
int fishlight = 2;
int fishpump = 3;


byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
EthernetServer server(80);   // port to listen on
EthernetClient client;

char content_main_top[] = "<body bgcolor=black><font color=white><center>";
char S1[] = "Room 2, Light 1 is on " ;
char S2[] = "Room 2, Light 1 is off" ;
char S3[] = "Fish Light is on";
char S4[] = "Fish Light is off";
char S5[] = "Fish Pump is on";
char S6[] = "Fish Pump is off";
char S404[] = "Not Found";

/************************** Setup **********************/
void setup() 
{
  Serial.begin(9600); 
  Serial.println("Getting IP......");
  Ethernet.begin(mac);
  Serial.print("My IP address: ");
  Ethernet.localIP().printTo(Serial);
  Serial.println();
  Serial.print("Gateway IP address is ");
  Ethernet.gatewayIP().printTo(Serial);
  Serial.println();
  Serial.print("DNS IP address is ");
  Ethernet.dnsServerIP().printTo(Serial);
  Serial.println();
  pinMode(rm2light1, OUTPUT);
  pinMode(fishlight, OUTPUT);
  pinMode(fishpump, OUTPUT);
  Serial.print("Initialising rm2light1 ");
  Serial.print("Initialising fishlight ");
  Serial.print("Initialising fishpump ");
  Serial.println();
  digitalWrite(rm2light1, LOW);
  digitalWrite(fishlight, LOW);
  digitalWrite(fishpump, LOW);
}
void loop() 
{

checkclient();
}

void checkclient()
{
  EthernetClient client = server.available();
  if (client)   
  {
    boolean sentHeader = false;
    while (client.connected())
    {
      if (client.available())
      {
        if(!sentHeader){
        client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println();
          sentHeader = true;
        }
         char c = client.read(); 
         if (readString.length() < 20) 
         Serial.print(c);
         {readString.concat(c);}
         if (c == 'H')
         {
           Serial.println();
           int Is = readString.indexOf("/");
           int Iq = readString.indexOf("?");
           int Ib = readString.indexOf("b");
           int Ic = readString.indexOf("c");
           if(readString.indexOf("?") > 1)
           { 
             if (Ib == (Iq+1))
             {
               char carray[5];
               readString.toCharArray( carray,5,(Ib+1));
               Serial.println(carray);
                valueB = atof(carray);
               Serial.print("B is now: ");
               Serial.println(valueB);
               client.print (content_main_top);
               client.print("B is now: ");
               client.print(valueB);
             }
            else if (Ic == (Iq+1))
             {
               char carray[5];
               readString.toCharArray( carray,5,(Ic+1));
               Serial.println(carray);
                valueC = atof(carray);
               Serial.print("C is now: ");
               Serial.println(valueC);
               client.print (content_main_top);
               client.print("C is now: ");
               client.print(valueC);
             }
             else
             {
               char carray[2];
               readString.toCharArray( carray,2,(Iq+1));
               RecievedString = atoi(carray);
               switch (RecievedString) {
               case 1: action(1, client);digitalWrite(rm2light1, HIGH);break;
               case 2: action(2, client);digitalWrite(rm2light1, LOW);break;
               case 3: action(3, client);digitalWrite(fishlight, HIGH);break;
               case 4: action(4, client);digitalWrite(fishlight, LOW);break;
               case 5: action(5, client);digitalWrite(fishpump, HIGH);break;
               case 6: action(6, client);digitalWrite(fishpump, LOW);break;
               default: action(404, client);
               }
             }
          delay(1);
             client.stop();
             readString="";
             client.read(); client.read();
           }
         if (Iq < 0)
         {
         action(404, client);
         delay(1);
         client.stop();
         readString="";
         client.read(); client.read();
         }
          delay(1);
         client.stop();
         readString="";
         client.read(); client.read();
       }
     }
   }
 }
}

void action(int x, EthernetClient client)
{  
  if (x == 1) 
  {client.print (content_main_top);
   client.println(S1);
   Serial.println(S1);
  }
if (x == 2) 
  {client.print (content_main_top);
   client.println(S2);
   Serial.println(S2);
  }
if (x == 3) 
  {client.print (content_main_top);
   client.println(S3);
   Serial.println(S3);
  }
if (x == 4) 
  {client.print (content_main_top);
   client.println(S4);
   Serial.println(S4);
  }
if (x == 5) 
  {client.print (content_main_top);
   client.println(S5);
   Serial.println(S5);
  }
if (x == 6) 
  {client.print (content_main_top);
   client.println(S6);
   Serial.println(S6);
  }
if (x == 404) 
  {client.print (content_main_top);
   client.println(S404);
   Serial.println(S404);
  }
x=0;
}

Hi, I've been playing around with the Arduino code a little. I am using a DF Robot Relay Shield (has 4 relays)and 2 10K thermistors from adafruit to read temperature.
After the code preforms your digitalWrite to operate the relay, the code will do a digitalRead to see what the current state of the relays are and an analogRead to get temperature data. From the android a "9" will turn On all the relays, a "0" will cause a 404 which I changed to a space " " to clear the Line of text "Turning on 1" etc,from the android screen leaving just the Read data. Color coded the relays red for off and green for on.
Couple of issues with the Android code, I can only send 0 thru 9, if I enter 10 it sends 1, enter 21 it sends 2, etc.
Second the android controller keeps running after exit,draining my battery, so when I am done using the app I have to go to manage apps and forcestop the app.
Would like to be able to put in a URL address (i.e. myarduino.mysite.com) so I can use dynamic ip forwarding without having to know the IP address of the arduino.
Thanks, next post contains your code with my modifications...

/*********************** Marque's Arduino Controller Example ***********************/
/***********************  for questions: marque.l@gmail.com  ***********************/
/*
In the android app settingsscreen you can set up you IP and port.
For this example you need to call prefix 1 "B" and prefix 2 "C".
*/
#include <Ethernet.h>
#include <HTTPClient.h>
#include <SPI.h>
const int relay1 = 2; // DF Robot uses 2 thru 5
const int relay2 = 3;
const int relay3 = 4;
const int relay4 = 5;


int RecievedString;
int valueB;
int valueC;
String readString = String(20); 

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
EthernetServer server(8077);   // port to listen on
EthernetClient client;

char content_main_top[] = "<body bgcolor=black><font color=white><center>";
char S1[] = "Turning 1 on" ;
char S2[] = "Turning 1 off" ;
char S3[] = "Turning 2 on";
char S4[] = "Turning 2 off";
char S5[] = "Turning 3 on";
char S6[] = "Turning 3 off";
char S7[] = "Turning 4 on";
char S8[] = "Turning 4 off";
char S9[] = "Turning All On";
char S10[] = "All Off";
//char S404[] = "Not Found ";
char S404[] = "&nbsp;";

double Thermister(int RawADC) {
 double Temp;
 Temp = log(((10240000/RawADC) - 10000));
 Temp = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * Temp * Temp ))* Temp );
 Temp = Temp - 273.15;            // Convert Kelvin to Celcius
 Temp = (Temp * 9.0)/ 5.0 + 32.0; // Convert Celcius to Fahrenheit
 return Temp;
}

/************************** Setup **********************/
void setup() 
{
  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
  pinMode(relay3, OUTPUT);
  pinMode(relay4, OUTPUT);
  
  digitalWrite(relay1, LOW);
  digitalWrite(relay2, LOW);
  digitalWrite(relay3, LOW);
  digitalWrite(relay4, LOW);
  
  Serial.begin(9600); 
  Serial.println("Getting IP......");
  Ethernet.begin(mac);
  Serial.print("My IP address: ");
  Ethernet.localIP().printTo(Serial);
  Serial.println();
  Serial.print("Gateway IP address is ");
  Ethernet.gatewayIP().printTo(Serial);
  Serial.println();
  Serial.print("DNS IP address is ");
  Ethernet.dnsServerIP().printTo(Serial);
  Serial.println();
}
void loop() 
{
 
checkclient();
}

void checkclient()
{
  EthernetClient client = server.available();
  if (client)   
  {
    boolean sentHeader = false;
    while (client.connected())
    {
      if (client.available())
      {
        if(!sentHeader){
        client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("<meta http-equiv='refresh' content='10'>"); 
          client.println();
          sentHeader = true;
        }
         char c = client.read(); 
         if (readString.length() < 20) 
         Serial.print(c);
         {readString.concat(c);}
         if (c == 'H')
         {
           Serial.println();
           int Is = readString.indexOf("/");
           int Iq = readString.indexOf("?");
           int Ib = readString.indexOf("b");
           int Ic = readString.indexOf("c");
           if(readString.indexOf("?") > 1)
           { 
             if (Ib == (Iq+1))
             {
               char carray[5];
               readString.toCharArray( carray,5,(Ib+1));
               Serial.println(carray);
                valueB = atof(carray);
               Serial.print("B is now: ");
               Serial.println(valueB);
               client.print (content_main_top);
               client.print("B is now: ");
               client.print(valueB);
             }
            else if (Ic == (Iq+1))
             {
               char carray[5];
               readString.toCharArray( carray,5,(Ic+1));
               Serial.println(carray);
                valueC = atof(carray);
               Serial.print("C is now: ");
               Serial.println(valueC);
               client.print (content_main_top);
               client.print("C is now: ");
               client.print(valueC);
             }
             else
             {
               char carray[2];
               readString.toCharArray( carray,2,(Iq+1));
               RecievedString = atoi(carray);
               switch (RecievedString) {
               case 1: digitalWrite(relay1, HIGH);action(1, client);break;/* Put the digitalWrite first, then the action portion will read the status */
               case 2: digitalWrite(relay1, LOW);action(2, client);break;
               case 3: digitalWrite(relay2, HIGH);action(3, client);break;
               case 4: digitalWrite(relay2, LOW);action(4, client);break;
               case 5: digitalWrite(relay3, HIGH);action(5, client);break;
               case 6: digitalWrite(relay3, LOW);action(6, client);break;
               case 7: digitalWrite(relay4, HIGH);action(7, client);break;
               case 8: digitalWrite(relay4, LOW);action(8, client);break;
               case 9: digitalWrite(relay1, HIGH);digitalWrite(relay2, HIGH);digitalWrite(relay3, HIGH);digitalWrite(relay4, HIGH);action(9, client);break; /* Basically a call for all relays on */
               case 10: action(10, client);break;
               default: action(404, client);
               }
             }
          delay(1);
             client.stop();
             readString="";
             client.read(); client.read();
           }
         if (Iq < 0)
         {
         action(404, client);
         delay(1);
         client.stop();
         readString="";
         client.read(); client.read();
         }
          delay(1);
         client.stop();
         readString="";
         client.read(); client.read();
       }
     }
   }
 }
}


void action(int x, EthernetClient client)
 
{  
/* Read the current status of the relays */
if(x >= 0) {
   int status1 = digitalRead(relay1);
   int status2 = digitalRead(relay2);
   int status3 = digitalRead(relay3);
   int status4 = digitalRead(relay4);
    client.print (content_main_top);
    //client.println("
");
    if(status1 == 1) {
    client.print("<font color='green'>Relay 1 is ON&nbsp;</font>");
    }else{
    client.print("<font color='red'>Relay 1 is OFF</font>");  
    }
    //client.print(status1);
    //client.print("   Relay 2 is "); 
    //client.print(status2);
    if(status2 == 1) {
    client.print("<font color='green'>&nbsp;&nbsp;&nbsp;&nbsp; Relay 2 is ON&nbsp;</font>");
    }else{
    client.print("<font color='red'>&nbsp;&nbsp;&nbsp;&nbsp; Relay 2 is OFF</font>");  
    }
    client.println("
");
    //client.print("Relay 3 is "); 
    //client.print(status3);
    if(status3 == 1) {
    client.print("<font color='green'>Relay 3 is ON&nbsp;</font>");
    }else{
    client.print("<font color='red'>Relay 3 is OFF</font>");  
    }
    //client.print("   Relay 4 is "); 
    //client.print(status4);
    if(status4 == 1) {
    client.print("<font color='green'>&nbsp;&nbsp;&nbsp;&nbsp; Relay 4 is ON&nbsp;</font>");
    }else{
    client.print("<font color='red'>&nbsp;&nbsp;&nbsp;&nbsp; Relay 4 is OFF</font>");  
    }
    client.println("
");
/* Temperature readings here */
    client.print("A0 is ");
    client.print(int(Thermister(analogRead(0))));  // display Fahrenheit
    client.print("&deg;F");
    client.print("&nbsp;&nbsp;&nbsp;&nbsp; A1 is ");
    client.print(int(Thermister(analogRead(1))));  // display Fahrenheit
    client.print("&deg;F");
    client.println("
");
}
  
  if (x == 1) 
  {//client.print (content_main_top);
   client.println(S1);
   Serial.println(S1); 
  }
if (x == 2) 
  {//client.print (content_main_top);
   client.println(S2);
   Serial.println(S2);
  }
if (x == 3) 
  {//client.print (content_main_top);
   client.println(S3);
   Serial.println(S3);
   //digitalWrite(relay2,HIGH);
  }
if (x == 4) 
  {//client.print (content_main_top);
   client.println(S4);
   Serial.println(S4);
   //digitalWrite(relay2,LOW);
  }
if (x == 5) 
  {//client.print (content_main_top);
   client.println(S5);
   Serial.println(S5);
   //digitalWrite(relay3,HIGH);
  }
if (x == 6) 
  {//client.print (content_main_top);
   client.println(S6);
   Serial.println(S6);
   //digitalWrite(relay3,LOW);
  }
if (x == 7) 
  {//client.print (content_main_top);
   client.println(S7);
   Serial.println(S7);
   //digitalWrite(relay4,HIGH);
  }
if (x == 8) 
  {//client.print (content_main_top);
   client.println(S8);
   Serial.println(S8);
   //digitalWrite(relay4,LOW);
  }  
if (x == 9) 
  {//client.print (content_main_top);
   client.println(S9);
   Serial.println(S9);
  }
if (x == 10) 
  {//client.print (content_main_top);
   client.println(S10);
   Serial.println(S10);
  } 
if (x == 404) 
  {//client.print (content_main_top);
   client.println(S404);
   Serial.println(S404);
  }
x=0;
if (x == 0)
 {
  client.println("&nbsp;");
 }
}
/* Done */

Thanks i was thinking about doing a home automation project (probably just lights) but i havent coded anything for android before so ive been putting it off this will definately help

SamuelFreeman:
Howdy Marque,

Any idea why my other pins are high? I can pop a led into any of my unused pins and the led lights up?

Very soon I'm going to buy another etherten and use the first one as a lightswitch that will send the status of the pins through to another etherten connected to my server. Server will use php to write values to a db, then switch relays accordlingly. As I'm not the best coder its a daunting task!

I have no idea why you unused pins are high, i have no experiance with the etherten. I'm an beginning amateur as well, i think a pro or more experianced dev will laugh about my arduino / android code. :smiley:

mutantgeek:
Hi, I've been playing around with the Arduino code a little. I am using a DF Robot Relay Shield (has 4 relays)and 2 10K thermistors from adafruit to read temperature.
After the code preforms your digitalWrite to operate the relay, the code will do a digitalRead to see what the current state of the relays are and an analogRead to get temperature data. From the android a "9" will turn On all the relays, a "0" will cause a 404 which I changed to a space " " to clear the Line of text "Turning on 1" etc,from the android screen leaving just the Read data. Color coded the relays red for off and green for on.

Looks good!

Couple of issues with the Android code, I can only send 0 thru 9, if I enter 10 it sends 1, enter 21 it sends 2, etc.

In the exapmle code the arduino looks for one digit after the questionmark, so you need to make a little change in the arduino code to make it look for two....
change in the checkclient() part:

else
             {
               char carray[2];
               readString.toCharArray( carray,2,(Iq+1));
               RecievedString = atoi(carray);
               switch (RecievedString) {

to:

else
             {
               char carray[2];
               readString.toCharArray( carray,3,(Iq+1));
               RecievedString = atoi(carray);
               switch (RecievedString) {

so it will look for two digit, but you need to send strings with two digits to make it work well (eg. 01, 02, 09, 10, 99)

Second the android controller keeps running after exit,draining my battery, so when I am done using the app I have to go to manage apps and forcestop the app.

I tink it's the way android is build but it should not drain your battery bacuase it is just some simple code.

Would like to be able to put in a URL address (i.e. myarduino.mysite.com) so I can use dynamic ip forwarding without having to know the IP address of the arduino.

Perhaps in a next version, thanks for the sugestion!

@marque: Great work! :wink:

SamuelFreeman:
Any idea why my other pins are high? I can pop a led into any of my unused pins and the led lights up?

Is it likely to be this reason?

The pullup resistor is enough to light an LED dimly, so if LEDs appear to work, but very dimly, this is a likely cause.

Marque ,
Wow , I love the app ...I sent an email to you as well , but i also wanted to say THANK YOU! on the forum. I am now able to use your app to control my home audio system . I tried the Android tablet in my garage + outside and it works great ! I activated more buttons in the code and found it very straight forward . I have other code that I want to integrate as well as some low voltage lighting.
Keep up the great work and MANY THANKS on a job well done!
Build_it_Bob

Are there any plans to enable USB serial communication with an Arduino in this app?

finally.. i found the most important part of my project.. hehe thank you for this post.. uhmm marque can you post or share the codes from you android app? cause i want to see it.. i am really noob to making android app and i want to see hwo the code is constructed if you dont mind.. anyway thank you so much for this post.. i will try it tomorrow hehe

additional question.. uhmm can you tell me which part in your sketch the actions the arduino makes after recieving strings from the app? cause i want to insert ther actions like digitalwrite for my relays to turn on.. thank you

i downloaded the app sir..i downlaoded it on my samsung galaxy tab.. how will i go to settings screen? i dont see other button that goes to settings screen?

SUPERB!!

Thank you Marque!!!

This is just what I needed. I just started on my room-automation project today, so I'm sure I'll come up with some suggestions soon enough :slight_smile:

I tried rating the app, but unfortunately i don't have a Google+ account as yet -- will get around to that soon!

Thanks,
R

PS - Though I've made some changes and its working great, i have no clue what the following code does. Could you please explain it to me in just a brief overview sentence or two? Thanks!

 {readString.concat(c);}
         if (c == 'H')
         {
           Serial.println();
           int Is = readString.indexOf("/");
           int Iq = readString.indexOf("?");
           int Ib = readString.indexOf("b");
           int Ic = readString.indexOf("c");
           if(readString.indexOf("?") > 1)
           { 
             if (Ib == (Iq+1))
             {
               char carray[5];
               readString.toCharArray( carray,5,(Ib+1));
               Serial.println(carray);
                valueB = atof(carray);
               Serial.print("B is now: ");
               Serial.println(valueB);
               client.print (content_main_top);
               client.print("B is now: ");
               client.print(valueB);
             }
            else if (Ic == (Iq+1))
             {
               char carray[5];
               readString.toCharArray( carray,5,(Ic+1));
               Serial.println(carray);
                valueC = atof(carray);
               Serial.print("C is now: ");
               Serial.println(valueC);
               client.print (content_main_top);
               client.print("C is now: ");
               client.print(valueC);
             }

djjoshuad:
Are there any plans to enable USB serial communication with an Arduino in this app?

No sorry, Just IP/TCP network

pisayjames:
finally.. i found the most important part of my project.. hehe thank you for this post.. uhmm marque can you post or share the codes from you android app? cause i want to see it.. i am really noob to making android app and i want to see hwo the code is constructed if you dont mind.. anyway thank you so much for this post.. i will try it tomorrow hehe

additional question.. uhmm can you tell me which part in your sketch the actions the arduino makes after recieving strings from the app? cause i want to insert ther actions like digitalwrite for my relays to turn on.. thank you

The first piece of code looks for the recieved string and send it to the second piece of code where the action takes place.
First piece of code:

 else
             {
               char carray[2];
               readString.toCharArray( carray,2,(Iq+1));
               RecievedString = atoi(carray);
               switch (RecievedString) {
               case 1: action(1, client);break;          //if found a "1" goto void action and preform action 1
               case 2: action(2, client);break;
               case 3: action(3, client);break;
               case 4: action(4, client);break;
               case 5: action(5, client);break;
               case 6: action(6, client);break;
               default: action(404, client);
               }

Second piece of code:

void action(int x, EthernetClient client)           //this is where the actions take place
{  
  if (x == 1)                                          //if found "1" this action takes place
  {client.print (content_main_top);     
   client.println(S1);                               //put your actions for button 1 here, like digitalwrite etc...
   Serial.println(S1);
  }
if (x == 2)                                          //if found "1" this action takes place
  {client.print (content_main_top);
   client.println(S2);                            //put your actions for button 2 here
   Serial.println(S2);
  }

pisayjames:
i downloaded the app sir..i downlaoded it on my samsung galaxy tab.. how will i go to settings screen? i dont see other button that goes to settings screen?

You can find the settings in the menu. You do not have a standard menu button as such. What you have is a softkey which can be found in different places depending on which android version you are in. This softkey takes the form of OPTIONS or SETTINGS which can be selected like a menu. IT looks like 3/4 horizontal bars.

I hope that answers your questions and I'm more than happy to help you out again anytime.

RB:
SUPERB!!

Thank you Marque!!!

This is just what I needed. I just started on my room-automation project today, so I'm sure I'll come up with some suggestions soon enough :slight_smile:

I tried rating the app, but unfortunately i don't have a Google+ account as yet -- will get around to that soon!

Thanks,
R

PS - Though I've made some changes and its working great, i have no clue what the following code does. Could you please explain it to me in just a brief overview sentence or two? Thanks!

 {readString.concat(c);}

if (c == 'H')
         {
           Serial.println();
           int Is = readString.indexOf("/");
           int Iq = readString.indexOf("?");
           int Ib = readString.indexOf("b");    //arduino looks for a b
           int Ic = readString.indexOf("c");    //arduino looks for a c
           if(readString.indexOf("?") > 1)
           {
             if (Ib == (Iq+1))                          // if there is a b
             {
               char carray[5];
               readString.toCharArray( carray,5,(Ib+1));    // read the value after the "b"
               Serial.println(carray);
                valueB = atof(carray);                              //set the found value to variable "valueB"
               Serial.print("B is now: ");
               Serial.println(valueB);                                  //print the found value
               client.print (content_main_top);
               client.print("B is now: ");
               client.print(valueB);
             }
            else if (Ic == (Iq+1))                                            // the same for "c"
             {
               char carray[5];
               readString.toCharArray( carray,5,(Ic+1));
               Serial.println(carray);
                valueC = atof(carray);
               Serial.print("C is now: ");
               Serial.println(valueC);
               client.print (content_main_top);
               client.print("C is now: ");
               client.print(valueC);
             }

in thise piece of code you can set two variable with you android app. In the settings screen you can set a prefix in the two textboxes top right. in the first one put a "b" and in the second one put a "c". on the main screen you can put a value in the two text views top left and hit the send button. the app will send a HTTP GET request in the following format: "http://yourip:yourport/?prefixvalue" , "http://192.168.1.120:80/?b2800". where the "b" is the prefix you have set in the settingsscreen and 2800 is the value you set in the main screen. The arduino sketch will look for a "b" or a "c" and sets the variable to the value that follows.
I have commented the code above, hope it clears it up for you.