I am making an app to send UDP packets in order to switch on a LED bulb. I have been able to perform all the actions when I am connecting to the Ad-hoc created by the Wifi bridge.
Now, I want to configure the Wifi bridge so that it can connect to my main router. I have the AT command set to perform this procedure but somehow I am not able to receive the response form the Wifi bridge for the commands which I am sending to it.
The procedure is as follows:-
Step 1 : Send UDP message to the LAN broadcast IP address of "10.10.100.255" and port of 48899 => "Link_Wi-Fi"
All Wifi bridges on the LAN will respond with their details. Response is "10.10.100.254, ACCF232483E8"Step 2 : (optional for changing settings on the wifi bridge): Then send "+ok" to the LimitlessLED Wifi Bridge. Send UDP message to the response IP address returned from step 1 "10.10.100.254" => "+ok"
- Step 3 : (optional for changing settings on the wifi bridge): After that you may send AT commands (ending with \r\n) to the module.
The code for sending the UDP packets is as follows
-(void)configureWifi{
counter++;
NSString *host = @"10.10.100.255";
if ([host length] == 0)
{
[self logError:@"Address required"];
return;
}
int port = 48899; //[portField.text intValue];
if (port <= 0 || port > 65535)
{
[self logError:@"Valid port required"];
return;
}
NSString *msg = @"Link_Wi-Fi";
NSData *data = [msg dataUsingEncoding:NSUTF8StringEncoding];
NSLog(@"the message sent is %@", data);
[udpSocket sendData:data toHost:host port:port withTimeout:-1 tag:tag];
}
Now in order to setup the socket and to receive the data I am using these two delegate methods:
- (void)setupSocket
{
// Setup our socket.
// The socket will invoke our delegate methods using the usual delegate paradigm.
// However, it will invoke the delegate methods on a specified GCD delegate dispatch queue.
//
// Now we can configure the delegate dispatch queues however we want.
// We could simply use the main dispatc queue, so the delegate methods are invoked on the main thread.
// Or we could use a dedicated dispatch queue, which could be helpful if we were doing a lot of processing.
//
// The best approach for your application will depend upon convenience, requirements and performance.
//
// For this simple example, we're just going to use the main thread.
udpSocket = [[GCDAsyncUdpSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];
NSError *error = nil;
if (![udpSocket bindToPort:0 error:&error])
{
[self logError:FORMAT(@"Error binding: %@", error)];
return;
}
if (![udpSocket beginReceiving:&error])
{
[self logError:FORMAT(@"Error receiving: %@", error)];
return;
}
[self logInfo:@"Ready"];
}
and to Receive data this is the method which is note getting called after sending the UDP packets. This is the delegate method of the GCDAsyncUdpSocket class which I have used in my project in order to send and receive the UDP packets.
- (void)udpSocket:(GCDAsyncUdpSocket *)sock didReceiveData:(NSData *)data
fromAddress:(NSData *)address
withFilterContext:(id)filterContext
{
NSString *msg = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
if (msg)
{
[self logMessage:FORMAT(@"RECV: %@", msg)];
}
else
{
NSString *host = nil;
uint16_t port = 0;
[GCDAsyncUdpSocket getHost:&host port:&port fromAddress:address];
[self logInfo:FORMAT(@"RECV: Unknown message from: %@:%hu", host, port)];
}
}
Once I am able to receive the response I will be able to send the next AT commands in order to configure the Bridge.
Thanks. Any help will be appreciated.