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POSending UISlider value using AsyncUdpSocket to Arduino via UDP
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copied!<p>i am trying to send the UISlide value to Arduino Uno (With wifi shield) to control the Servo attached.</p> <p>The following is the Xcode i have made. i am using the AsyncUdpSocket class , also tried with the GCDAsyncUdpSocket. Ok i managed to get it to work by clearing the buffer after every value received. Now the problem is the Lag :( .. </p> <blockquote> <p>-(void)viewDidLoad { [super viewDidLoad];<br> mySocket = [[AsyncUdpSocket alloc]initWithDelegate:self]; gcdSocket = [[GCDAsyncUdpSocket alloc]initWithDelegate:self delegateQueue:dispatch_get_main_queue()]; mySlide.minimumValue = 0; mySlide.maximumValue = 180; // Do any additional setup after loading the view, typically from a nib. }</p> <p>-(IBAction)slideValueChange:(UISlider*)sender{<br> NSInteger value = lround(sender.value); myLabel.text = [NSString stringWithFormat:@"%d",value]; NSString * address = @"192.168.1.7"; UInt16 port = 8888; NSData *myData = [myLabel.text dataUsingEncoding:NSUTF8StringEncoding];</p> </blockquote> <pre><code>//[gcdSocket sendData:myData toHost:address port:port withTimeout:-1 tag:2]; [mySocket sendData:myData toHost:address port:port withTimeout:-1 tag:2]; } </code></pre> <blockquote> <p>-(void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. }</p> <p>-(IBAction)sendMessage:(id)sender {</p> </blockquote> <pre><code>NSString *message = [[NSString alloc]init]; NSString * address = @"192.168.1.7"; message = @"test"; UInt16 port = 8888; NSData * data = [message dataUsingEncoding: NSUTF8StringEncoding]; [mySocket sendData:data toHost:address port:port withTimeout:-1 tag:1]; </code></pre> <p>}</p> <blockquote> <p>-(void)onUdpSocket:(AsyncUdpSocket *)sock didSendDataWithTag:(long)tag {</p> </blockquote> <pre><code>if (tag == 1){ NSLog(@"something is happening !!"); } else if (tag == 2){ NSLog(@"received message from slider");}} </code></pre> <blockquote> <p>Following is my arduino code</p> </blockquote> <pre><code>Servo servo ; int status = WL_IDLE_STATUS; char ssid[] = "Allcad"; // your network SSID (name) char pass[] = "gauravsoni"; unsigned int localPort = 8888 ; char PacketBuffer [ UDP_TX_PACKET_MAX_SIZE ] ; WiFiUDP Udp; void setup () { 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); } Serial.println("Connected to wifi"); printWifiStatus(); Serial.println("\nStarting connection to server..."); Udp.begin(localPort); servo.attach ( 6 ) ; } void printWifiStatus() { // print the SSID of the network you're attached to: Serial.print("SSID: "); Serial.println(WiFi.SSID()); // print your WiFi shield's IP address: IPAddress ip = WiFi.localIP(); Serial.print("IP Address: "); Serial.println(ip); // print the received signal strength: long rssi = WiFi.RSSI(); Serial.print("signal strength (RSSI):"); Serial.print(rssi); Serial.println(" dBm"); } void loop ( ) { int packetSize = Udp.parsePacket() ; if ( packetSize ) { Udp.read ( PacketBuffer , UDP_TX_PACKET_MAX_SIZE ) ; int num = 0; num = atoi ( PacketBuffer ) ; Serial.print("New num value is: "); Serial.println(num); servo.write (num) ; for(int i=0;i<3;i++) { Serial.println(i); PacketBuffer[i] = 0; } } delay ( 5 ) ; } </code></pre>

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