IDBLUE Frequently Asked Questions

If any of these questions don’t seem to apply to your issue, please contact IDBLUE Support and we can walk you through any issues you might be encountering.

Apple iOS

When using the HID version of IDBLUE devices, I don’t have the onscreen keyboard anymore!

This is a known issue with HID profile devices in general. Our IDBLUE HID profile device is recognized as a secondary keyboard and, by default, a smartphone may disable viewing the onscreen keyboard.


You can toggle the onscreen keyboard by pressing the power button when connected.


Once you pair with the IDBLUE HID device:

  • Go to Settings and select “Language and input”.
  • Click on “Default” (Or “Current Keyboard” in Android 5.0+) located just under the “Keyboard and input methods” heading to open the “Choose input method” dialog.
  • Turn the “Hardware physical keyboard” OFF (or on Android 5.0+, it’s referred to “Hardware: Show input method”.

This setting will toggle the onscreen keyboard when you select a text field when paired with our HID profile device. If you have any other questions, please contact IDBLUE Support.


Do I need to do anything before submitting an App to iTunes Store with support for IDBLUE devices?

When working with any MFI accessory, the end user must register their app with the accessory manufacturer first as we need to whitelist your iOS app before you can submit it to the Apple App Store for approval. This is a requirement by Apple and stated in the iOS Developer Program License Agreement (as of  6/10/13).

iOS Accessories:
3.3.27 Your Application may interface, communicate, or otherwise interoperate with or control an
iOS Accessory (as defined above) through Bluetooth or Apple’s 30-pin dock connector only if

  • (i) such iOS Accessory is licensed under Apple’s MFi Licensing Program at the time that You initially submit Your Application,
  • (ii) the MFi Licensee has added Your Application to a list of those approved for interoperability with their iOS Accessory, and
  • (iii) the MFi Licensee has received approval from the Apple MFi Licensing Program for such addition.

You must supply IDBLUE with information regarding your App which we must register with Apple for approval  before your app will be whitelisted.


  • Your application must only start communication between your app and IDBLUE readers on an explicit action in the UI. It cannot auto­start upon connect and it must stop whenever the user stops using your application.
  • com.idblue.r8 is the only external accessory protocol that can be used by 3rd party apps. Make sure this is listed in your Info.plist in the UISupportedExternalAccessoryProtocols array.
  • After we have confirmed whitelisting of your app, you will need to add the following information to the “Review Notes” section of your Apple app submission: MFI PPID 111609-0001

NOTE: Your iOS app does not need to be re-whitelisted every time you release an update. However, we do reserve the right to remove an application from our whitelist if it appears that the app no longer meets requirements.

What are “Whitelisted” apps?

A key aspect of Mobile Application Management (MAM) is Whitelisted apps. Whitelisted apps are applications manufacturers/developers have deemed as safe to use on iPads and iPhones (Apple iOS devices) or Android phones and tablets.

What is the reason for “Whitelisting” apps?

Whitelisted apps are added to ensure that the applications being used are in fact the authorized apps and not malicious or otherwise inappropriate. These apps can be the same for all users or can be unique to each individual device group.

Additional links:

Please contact IDBLUE Support for more information.


How do I initialize the IDBLUE iOS SDK?

NOTE: This is taken from the IDBLUE iOS SDK documentation. Please refer to the SDK documentation for more details.

In this example, we show you how to create your own class, IDBlueApi, that inherits from IDBlueHfApi. You can use this class to communicate with IDBLUE devices.

The IDBlueHfApi takes care of all of the leg work of initializing the SDK. All you need to do is override a few methods and make a few calls into the IDBlueHfApi (and IDBlueCoreApi). You should review IResponseHandler and ISessionHandler if you haven’t already done so.

Create a class named IDBlueApi that inherits from IDBlueHfApi, like so:

// IDBlueApi.h
#import <Foundation/Foundation.h>
#import "IDBlueHfApi.h"
#import "iOSSession.h"

// By sub-classing IDBlueHfApi, IDBlueApi is the only object from the IDBLUE
// iOS SDK you need to instantiate.
@interface IDBlueApi : IDBlueHfApi {
    iOSSession* _iosSession;

-(BOOL) openFirstIDBlueDevice;


The corresponding implementation file should look like:

#import "IDBlueApi.h"
@implementation IDBlueApi
-(id) init {
    _iosSession = [[iOSSession alloc] init];
    self = [super initWithSession: _iosSession];
    if (self) {
        // Log the current version of the SDK we are using
        NSLog(@"%@", [self sdkVersion]);
        // add custom initialization here
    return self;

-(BOOL) openFirstIDBlueDevice {
    return [_iosSession openFirstIDBlueDevice];

Now you’re ready to start using the IDBLUE SDK in your application. When you’re application starts, create an instance of IDBlueApi:

// Initializing the IDBLUE SDK is as simple as creating an instantiate of IDBlueApi
IDBlueApi* sdk = [[IDBlueApi alloc] init];

Before you can communicate with an IDBLUE device in your application, you need to open a session first. Since iPhone only supports one connected accessory at the moment, you can design your application to use the one and only IDBLUE device (if one is present).

To do this, use the openFirstIDBlueDevice method of iOSSession:

if ([sdk openFirstIDBlueDevice]) {
    // onSessionOpened callback method will be called when the session is open
else {
    // A session could not be opened. Is IDBLUE paired with the iPhone?

To get notifications of session events (such as session opened, session closed, etc.) you have 2 options:

  • Override the session event callback methods in IDBlueApi
  • Create a separate class that implements the protocol ISessionHandler and register it with the IDBlueiOSSdk using addSessionDelegate

Overriding the callback methods in IDBlueApi is the simpler method. To do that, add the following code to IDBlueApi.m:

// SessionHandler callback methods we are overriding
-(void) onSessionOpened: (id) session {
    [super onSessionOpened:session];
    NSLog(@"IDBLUE session opened");

-(void) onSessionClosed: (id) session {
    [super onSessionClosed:session];
    NSLog(@"IDBLUE session closed");

When using the IDBLUE iOS SDK, sessions should be managed as follows:

  • openFirstIDBlueDevice should be called when you application starts and when it resumes from the background
  • closeSession should be called when you application goes to the background and when it terminates
  • You can use the UIApplicationDelegate protocol to detect when your application resumes from the background, is going to the background and when it terminates.

Now that we have the communication completed, let’s turn our attention to sending commands to IDBLUE and handling responses.

The IDBLUE SDK is designed asynchronously. That is, when you send a command to IDBLUE, the IDBLUE SDK does not wait for a response. Applications are notified of responses via the IResponseHandler protocol. When a response is received from IDBLUE, all registered IResponseHandlers are notified of the response via the appropriate callback method.

Note: the IDBlueCoreApi is itself a ResponseHandler (a class that implements the IResponseHandler protocol). So when you want to listen for events from IDBLUE, it’s as simple as overriding the ResponseHandler methods in your IDBlueApi class.

For example:

You want IDBLUE to scan for an RFID tag, and return back the tag identifier to our application. To do this you would call readTagId. Asynchronously, one of 2 possible callback methods will be invoked: either readTagIdResponse or readTagIdFailed, depending on whether an RFID tag was read successfully or not.

// IDBlueApi.h
-(BOOL) getTagId;

// IDBlueApi.m
// Illustrates how to get IDBLUE to scan an RFID tag and give us back the tag id.
// If IDBLUE finds a tag, the readTagIdResponse callback method will be invoked.
// If no RFID tag was found or an error occurred, the readTagIdFailed callback
// method will be invoked.
-(BOOL) getTagId {
    SendStatus* status = [self readTagId:self];
    if ([status successful]) {
        NSLog(@"get tag id command sent to IDBLUE");
        return TRUE;
    else {
        NSLog(@"failed to send get tag id command to IDBLUE");
        return FALSE;

// ResponseHandler callback methods we are overriding
-(void) readTagIdResponse: (IDBlueCommand*) command
                         withResponse: (ReadTagIdResponse*) response {
        [super readTagIdResponse:command withResponse:response];
        RfidTag* tag = [response rfidTag];
        NSString* tagId = [tag toString];
        NSLog(@"Got tag id: %@", tagId);

-(void) readTagIdFailed: (IDBlueCommand*) command
                   withResponse: (NackResponse*) response {
        [super readTagIdFailed:command withResponse:response];
        NSLog(@"Get tag id failed");