IoT Platform:Verify and connect a device

Initialize IoT Platform SDK for Java

Sample code:

#import <IotLinkKit/IotLinkKit.h>

    // Before you initialize the SDK, you must create a listener to monitor the status changes of a persistent connection.
    [[LinkKitEntry sharedKit] registerChannelListener:self];

    //// Specify the device certificate information.
    self.productKey = self.textFieldProductKey.text ;
    self.deviceName = self.textFieldDeviceName.text ;
    self.deviceSecret = self.textFieldDeviceSecret.text;

    LinkkitChannelConfig * channelConfig = [[LinkkitChannelConfig alloc] init];
    channelConfig.productKey = self.productKey;
    channelConfig.deviceName = self.deviceName;
    channelConfig.deviceSecret = self.deviceSecret;
    channelConfig.cleanSession = (self.cleanSession == 1);
    //channelConfig.server = @"your custom server url";
    //channelConfig.port = 1883;
    LinkkitSetupParams * setupParams = [[LinkkitSetupParams alloc] init];
    setupParams.appVersion = self.appVersion;
    setupParams.channelConfig = channelConfig;
    [[LinkKitEntry sharedKit] setup:setupParams resultBlock:^(BOOL succeeded, NSError * _Nullable error) {
        LinkkitLogDebug(@"setup error : %@", error);
        dispatch_async(dispatch_get_main_queue(), ^{
            [self ims_showHUDWithMessage:[NSString stringWithFormat:@ "Initialization :%@",
                                          succeeded ? @ "Success" : @ "Failure"]];
        });
    }];
            

Parameters

Deinitialize the SDK

Before you deinitialize the SDK, close the persistent MQTT connection between the device and IoT Platform. To deinitialize the SDK, call the following API operation.

    [[LinkKitEntry sharedKit] destroy:^(BOOL succeeded, NSError * _Nullable error) {
        LinkkitLogDebug(@"kit destroy error : %@", error);
        dispatch_async(dispatch_get_main_queue(), ^{
            [self ims_showHUDWithMessage:[NSString stringWithFormat:@ "Deinitialization: %@",
                                          succeeded ? @ "Success" : @ "Failure"]];
        });
    }];
            

Log switch

Turn on the internal log output switch of the SDK:

#import <IMSLog/IMSLog.h>

NSString * const IMS_DEMO_TAG = @"LinkkitDemo";

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Add the following code to enable the logging feature.
    [IMSLog setAllTagsLevel:IMSLogLevelAll];
    // Create a log panel and add it to the log framework.
    //[IMSLog addAssistant:[[IMSDashboardLogAssistant alloc] init]];
    // Enable logs to be displayed in the console.
    [IMSLog showInConsole:YES];
    // Specify a log tag.
    [IMSLog registerTag:IMS_DEMO_TAG];

    return YES;
}
            

Create a listener to monitor the status changes of the persistent MQTT connection.

Sample code:

- (void)onConnectStateChange:(nonnull NSString *)connectId state:(LinkkitChannelConnectState)state {
    NSString * connectTip = nil;
    if (state == LinkkitChannelStateConnected) {
        connectTip = @ "Connected";
    } else if (state == LinkkitChannelStateDisconnected) {
        connectTip = @ "Not connected";
    } else {
        connectTip = @ "Connecting";
    }
    dispatch_async(dispatch_get_main_queue(), ^{
        self.labelConnectState.text = connectTip;
    });
}

- (void)onNotify:(nonnull NSString *)connectId topic:(nonnull NSString *)topic data:(id _Nullable)data {
    NSString * downData = [NSString stringWithFormat:@ "The pushed data is received, topic :%@ \r\n", topic];
    downData = [downData stringByAppendingString:[NSString stringWithFormat:@ "\r \ndata :%@", data]];

    LinkkitLogDebug(@"kit recv  topic : %@", topic);

    dispatch_async(dispatch_get_main_queue(), ^{
        self.textViewDownData.text = downData;
    });
}

- (BOOL)shouldHandle:(nonnull NSString *)connectId 
               topic:(nonnull NSString *)topic {
    return YES;
}