Discovering the potential of mobile apps - hardware interaction

In today's digital age, smart mobile apps have become essential tools for improving user experience and optimizing business operations. But their greatest value lies in the ability to communicate and interact with hardware devices. Our developers routinely extend the functionality of the entire solution by carefully connecting devices to apps. In this article, we will discuss the topic of development, the benefits, possible limitations of communicating with hardware and of course remind some practical examples for our clients.

Connecting a mobile app to hardware

Developing mobile applications that communicate well with hardware devices opens a wide range of possibilities for companies, users, and developers. By linking software and hardware, it is possible to unlock unique features and create exceptional user experiences.

The advantages of communicating with hardware include:

• Extended functionality. Mobile apps can leverage the capabilities of hardware devices and provide advanced functionalities.
• Seamless user experience. Hardware integration allows smooth interaction and enhances user convenience.
• Automation and efficiency. Integration with hardware enables process automation and increases overall efficiency.
• Personalization. Communication with hardware allows apps to adapt and personalize user experience based on interactions with connected devices.

It is also important not to forget possible limitations such as compatibility issues, security concerns and the limits of specific devices. Understanding these factors in detail helps developers create robust and reliable solutions.

Two key types of hardware

When it comes to developing mobile applications that communicate with hardware, the devices used can be divided into two main categories: standardized hardware and custom solutions.

Let's have a closer look at them.

• Standardized hardware

As the name suggests, standardized hardware refers to commonly available devices with established communication protocols. Examples include Zebra scanners or myPOS payment terminals. 

Such devices often offer detailed documentation and libraries which considerably facilitate integration into mobile applications.

• Custom hardware

Custom hardware solutions are tailored to specific business needs and thus require special development. For example, Bikelink developed a custom prototype device based on a chip from Nordic Semiconductor (nRF52832). 

And that's not all! Bikelink further customized the device to suit all their requirements. As a result, the custom hardware solution offers specialized features specific to the unique bicycle locking system.

Communication types: from Bluetooth to USB

Mobile applications can communicate with hardware devices using a variety of methods. We will therefore focus on the four most common types of communication on the Android platform.

1) Bluetooth

Bluetooth offers mobile applications a versatile wireless communication in conjunction with hardware. Another advantage is a widespread, low power consumption, and reliable data transmission over short distances. Developers will use Bluetooth APIs and libraries to, for example, establish connections, exchange data, and control the devices themselves.

2) NFC (Near Field Communication)

NFC technology also provides contactless communication between mobile apps and devices. The main advantage is secure data exchange of nearby devices. NFC is commonly used for contactless payments, access control or data sharing.

3) USB (Universal Serial Bus)

USB connection creates a reliable and fast cable communication channel. By connecting the mobile device to a hardware via USB, applications can easily transfer data, control functions, and establish connections. USB integration is particularly useful when using peripheral devices such as printers, barcode scanners and industrial control devices.

4) SDK Integration

Many hardware manufacturers provide development environments (SDKs) for an easy integration. The SDK contains pre-built libraries, APIs, and documentation. Again, this means smooth communication with hardware devices. Examples include Zebra scanners, which can be communicated with using DataWedge or the Enterprise Mobility Developer Kit (EMDK).

Bikelink: Efficient communication with BLE

The Bikelink mobile app is a prime example of a successful hardware-software integration. The app provides a secure and convenient solution for locking bicycles in paid parking lots.

Bikelink uses Bluetooth Low Energy (BLE) technology as a reliable connection to special bike locks. BLE is ideal for mobile applications due to its low power consumption and efficient data transmission. Thanks to this ingenious connection, users can park their bikes safely with just a few clicks!

Let's take a look at some examples of Kotlin code in practice:

BluetoothAdapter and BluetoothScanner Initialization:

private val bluetoothAdapter: BluetoothAdapter? by lazy {
BluetoothAdapter.getDefaultAdapter()
}

private val bluetoothScanner: BluetoothLeScanner? by lazy {
bluetoothAdapter?.bluetoothLeScanner
}

BluetoothManager and GATTClient Initialization:

private val bluetoothManager: BluetoothManager by lazy {
context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
}

private val gattClient: BluetoothGatt? by lazy {
bluetoothManager.openGattServer(context, gattCallback)
}

Verify that the device supports BLE:

fun isBLESupported(context: Context): Boolean {
return bluetoothAdapter?.isEnabled ?: false
}

Scan BLE devices within range:

fun startBLEScan(context: Context, scanCallback: ScanCallback) {
val scanSettings = ScanSettings.Builder()
.setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
.build()

bluetoothScanner?.startScan(null, scanSettings, scanCallback)

// Stop the scan after a specified duration
Handler().postDelayed({
bluetoothScanner?.stopScan(scanCallback)
}, SCAN_DURATION_MS)
}

Connecting to a BLE device:

fun connectToDevice(context: Context, device: BluetoothDevice, gattCallback: BluetoothGattCallback) {
gattClient?.connect()
}

Dactyl's experience in communicating with hardware

Our company has extensive experience in this area. Developing high-quality mobile applications that communicate perfectly with various hardware devices comes to us naturally. Do you have a challenge for us? We will gladly welcome it!

We have several successful projects behind. Let's introduce some of them.

Robe: Use of NFC technology

Our Robe app uses NFC technology for lightning configuration at concerts, festivals and other events. Users can use NFC to control and customize lighting as needed. This creates completely unforgettable and magical experiences!

Kurýr Na Slovensko: SDK integration

The KNS project integrates scanners with a mobile app to scan packages during the different phases of transport. Using Zebra's SDK, the app optimizes inventory management, increases barcode reading accuracy and improves tracking of delivered shipments.

POPP: Using Bluetooth to control swimming pools

The POPP app connects to custom hardware devices that allow users to control and monitor pool parameters. Using Bluetooth communication, the app provides real-time data and facilitates remote control of pools.

Where to go for a perfectly integrated app?

Connecting mobile apps to hardware creates endless possibilities for businesses and users. By integrating standardized and custom hardware, developers can unlock unique features, streamline operations, and create exceptional user experiences. Bluetooth, NFC, USB and SDK integration presents rich communication options to ensure perfect compatibility with a wide range of hardware devices. 

Developing applications and ensuring their perfect communication is our daily bread. Do you need an innovative solution for your business? Are you looking for a simple or complex customized application?

Contact us! Together we will embark on an exciting journey into the world of mobile apps and hardware.