Kinect Car

 

 

De’Ranged Bot from Kazi Murtaza.

Arduino WiFi Shield : JSON Parsing

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#include ;
#include ;

char ssid[] = "Kazi-House"; // your network SSID (name)
char pass[] = "123456789"; // your network password
int keyIndex = 0; // your network key Index number (needed only for WEP)

int status = WL_IDLE_STATUS;

WiFiServer server(80);

void setup() {
//Initialize serial and wait for port to open:
Serial.begin(9600);

// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue:
while(true);
}

// attempt to connect to Wifi network:
while ( status != WL_CONNECTED) {
Serial.print("Attempting to connect to SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network.
// Change this line if using open or WEP network:
status = WiFi.begin(ssid, pass);

// wait 10 seconds for connection:
delay(10000);
}
server.begin();
// you're connected now, so print out the status:
printWifiStatus();
pinMode(45, OUTPUT);
pinMode(46, OUTPUT);
pinMode(47, OUTPUT);
pinMode(48, OUTPUT);
pinMode(49, OUTPUT);
pinMode(51, OUTPUT);
}

void loop() {
// listen for incoming clients
WiFiClient client = server.available();
if (client) {
//Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
//Serial.write(c);
if(c=='1'){
if(client.read() == '=') {
char onoff = client.read();
if( onoff == '1'){
Serial.println("Center Bulb On");
digitalWrite(45,HIGH);
}
else if(onoff == '0'){
Serial.println("Center Bulb Off");
digitalWrite(45,LOW);
}
}
}
else if(c=='2'){
if(client.read() == '=') {
char onoff = client.read();
if( onoff == '1'){
Serial.println("No Device 1 On");
digitalWrite(46,HIGH);
}
else if(onoff == '0'){
Serial.println("No Device 1 Off");
digitalWrite(46,LOW);
}
}
}
else if(c=='3'){
if(client.read() == '=') {
char onoff = client.read();
if( onoff == '1'){
Serial.println("BathRoom TubeLight On");
digitalWrite(47,HIGH);
}
else if(onoff == '0'){
Serial.println("BathRoom TubeLight Off");
digitalWrite(47,LOW);
}
}
}
else if(c=='4'){
if(client.read() == '=') {
char onoff = client.read();
if( onoff == '1'){
Serial.println("No Device 2 On");
digitalWrite(48,HIGH);
}
else if(onoff == '0'){
Serial.println("No Device 2 Off");
digitalWrite(48,LOW);
}
}
}
else if(c=='5'){
if(client.read() == '=') {
char onoff = client.read();
if( onoff == '1'){
Serial.println("Room TubeLight On");
digitalWrite(49,HIGH);
}
else if(onoff == '0'){
Serial.println("Room TubeLight Off");
digitalWrite(49,LOW);
}
}
}
else if(c=='6'){
if(client.read() == '=') {
char onoff = client.read();
if( onoff == '1'){
Serial.println("No Device 3 On");
digitalWrite(51,HIGH);
}
else if(onoff == '0'){
Serial.println("No Device 3 Off");
digitalWrite(51,LOW);
}
}
}
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connnection: close");
client.println();
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
}
else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
//Serial.println("client disonnected");
}
}

void printWifiStatus() {
// print your WiFi shield's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
}

Communication Mediums: Arduino WiFi, RN-42 Bluetooth, Netduino Ethernet

Hello, I have gotten my hands on couple of communication devices which could be used for android and Arduino/ Netduino communication, first RN-42 SMD bought from robotics.pk – link, Arduino WiFi Shield also bought from robotics.pk – link and third is Netduino it self which comes with Ethernet shield built-in, and Netduino is given to me by my teacher for educational purposes only, sad cant keep it.

Any ways lets start of with, RN-42 SMD is fairly cheap comparatively to others available for sale on spark fun  and is very easy to use you just need 4 connections VCC(3.3v),GND,RX and TX and you are done and by default RN-42 runs on 115200 braud rate, I found this to be very cheap and easy to use although for making connections on the smd, could be stressing, you would need small and steady hands, after making connections and connecting it to my Arduino Mega 2560, I used my serial Bluetooth android app and data transfer was done perfectly and fast, and range was acceptable, about 50 to 60 feet. it is perfect fit for short range, battery powered application.

Second device is WiFi Shield, which lets Arduino board connect to the internet using the 802.11 wireless specification and comes with a micro-SD card socket for saving of html pages and data logging,  we could either use the WiFi Shield as Server or Client and in my case I use it as a server, although Arduino cant process anything above HTML and JavaScript but we can do with these all so well, with WiFi Shield, we use Get and Post methods – (which I will explain in next post how?) to send and receive data from Arduino, from then on its same as serial monitor or Bluetooth. So from my android I send a request on the ip which is assigned to WiFi Shield through DHCP, request could be Get or Post and Arduino executes that request.

Arduino and WiFi Shield : Controlling my room lights from Kazi Murtaza on Vimeo.

Third device which is Netduino in-built Ethernet Shield, I have not gotten around to configure it yet, but will do it next. I feel the results will be same as Arduino WiFi Shield.

So in end I realized one thing, WiFi Shield is a bit buggy, sometimes requests in buffer of Arduino don’t really execute and if they do its 4-5 sec delay, I guess it takes time to process the request and its fairly new so needs a firmware update, so WiFi shield is not recommended for on second execution for example like WiFi controlled car, for such projects Bluetooth should be preferred, and for projects such as Home Automation and such WiFi is ideal.

 

 

things

Requirement list

This is basic things i have at my dissposal, list you will need to follow my experiments, if you have any suggestion do comment

ITEM
ARDUINO MEGA 2560 Rev3
Bluetooth Serial Module
TRANSISTORS (C945)
RESISITANCE (330 ohm )
RESISITANCE ( 10k )
BREAD BOARD
JUMPER CABLES or WIRES
Relay 6V
PRINTER CABLE
ANDROID PHONE
ARDUINO WIFI SHIELD
7805 12V TO 5V
5V DC ADAPTER
100 OHM RESISTANCE
BLUETOOTH RN42 SMD
NETDUINO
9V BATTERY
9V BATTERY STRAP
VERO BOARD

for now I guess that’s it.

My Jarvis

Jarvis, the one from iron man movie, Yes, Digital Life Assistance crazy idea for hobby project, right ? well we have seen many different kind’s of implementation’s in hope’s of achieving what that rich bastard has, but if we were to have it, we must first have platform to build upon, as far as I can see we need a system which is capable of achieving tasks in real world and virtual world, so to start off my first task is controlling the lights with Arduino, don’t worry I will be taking it slow. Idea, if it was not clear above,  idea is to use Arduino without spending a lot of money(very crucial) to control devices such as bulbs, fans and stuff,  I plan on using some sort of communication shield, When done it will send some MESSEAGE(not really clear on that) to Arduino, Arduino will move some relays and give me back a  response, toggling devices.

next post will be about requirements and basic concept of controlling a device through relay.

Arduino: toggling leds through SERIAL monitor

ok here is a sample code which receives data from serial and toggles devices to test it you can plug in led’s to test it,

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//for keeping the current status of leds
int status1 = 0;
int status2 = 0;
int status3 = 0;
int status4 = 0;
//leds connected to Arduino int pin1 = 2;
int pin2 = 4;
int pin3 = 6;
int pin4 = 8;
void setup() {
//open serial ports
Serial.begin(9600);
Serial.println("Serial Ready.");
Serial.println("Waiting...");
//open led ports
pinMode(pin1, OUTPUT);
pinMode(pin2, OUTPUT);
pinMode(pin3, OUTPUT);
pinMode(pin4, OUTPUT);
}
void loop() {
//keep the incoming byte, in readByte
int readByte;
boolean readSomething = false;
//read serial data
while(Serial.available() > 0 ){
readByte =  Serial.read();
readSomething = true;
Serial.println(readByte);
}
//if something was read toggle the selective device
if(readSomething){
readSomething = false;
if(readByte==1){ status1^=1; digitalWrite(pin1,status1);}
if(readByte==2){ status2^=1; digitalWrite(pin2, status2);}
if(readByte==3){ status3^=1; digitalWrite(pin3, status3);}
if(readByte==4){ status4^=1; digitalWrite(pin4, status4);}
}// status^=1 is xoring if its 0 it will be 1 and if its 1 it will be 0..
}