How to Write SDK-Based Firmware for an IoT Devices 2024

Once you’ve created an IoT device and tested it out, after which you can assemble it onto the printed circuit board, you have the complete device! 

The relay controls the device via the mobile application, voice commands within the Google and Apple ecosystems, a Telegram bot, and phone calls. 

The initial series of this device was used by several clients who are extremely happy with its functionality and ease of use.

Installing Custom Firmware Development requires connecting each device individually using an expensive USB cable, making the task costly and time-consuming.

The best solution was the SDK development kit. It also can create custom firmware. The SDK allows you to upgrade the entire line of devices via the Internet.

The SDK provides extra features such as a built-in interface to the web, enabling you to manage the device’s settings, send alerts about the state of the device, and more. Because of the SDK, it is possible to use all this “out of the box” right after the device’s firmware is installed. One of the advantages of using the SDK is that it comes with the core features of an ordinary device. 

The programmer must obtain appropriate, pre-built examples of code to create their device using the instructional. It will aid in explaining how the device’s operations.

What Is SDK & Its Benefits?

Software development kits (SDK) refer to a collection of tools specific to a platform for developers. There are components, such as compilers, debuggers, and libraries, to write programs that run on a particular operating system, platform, and programming language.

 SDKs contain everything you require to develop and run software in one spot. In addition, they include guides, documentation, and manuals, as well as frameworks and APIs, to speed up application development.

SDKs provide various benefits throughout the development process and IoT Service Management Firmware. They can be used to:

Efficient Development

SDKs speed up development with pre-built components and libraries that can be integrated into programs. They save developers time previously spent on programming or debugging the code from starting from scratch.

Faster Deployment

SDKs facilitate faster application deployment by offering software that lets developers create and deploy applications rapidly. 

They typically support multiple platforms, allowing developers to build applications for several operating systems and devices swiftly.


SDKs offer pre-built modules, parts, packages, and instruments for developers to create deployment, test, and release software programs. 

They facilitate the development, testing, and integration of different software and services, including codes, tutorials, and code samples, as well as debugging tools and code libraries.

Cost Savings

SDKs can reduce the time and energy required to develop applications. With pre-built tools and components, SDKs enable developers to build new capabilities and features swiftly. 

SDKs also reduce the time and money needed to create new apps and the expenses related to deploying. Also managing applications by facilitating installation procedures and upgrades.

Writing SDK-Based Custom firmware

The Custom firmware Development was already explicitly developed for Wi-Fi and is available as source code on GitHub.

Modifications aren’t necessary and require only adding particular parameters specific to the device.

Because the firmware base is changing, we cannot edit the product on the platform yet. 

  • On your selected IoT development platform, navigate to “Products.” On the “Products” page, click “Add Product.”
  • Select the microcontroller on which this device is built.
  • Please provide relevant information about the device, such as its name, and then upload an icon.
  • Click “Add Firmware,” Select “Custom,” and click “Next.”
  • Select the “Connection Info” link. After that, you can leave the window with the connection settings open because some must be added to the firmware code.
  • Go to the downloaded firmware repository and open the file where you will make the changes. Take the product ID, copy it, and paste it into the product name and firmware ID fields. Enter your brand name in place of the default name under” the “device name” section.
  • Keep the modifications within the firmware’s codes and then use them to flash the device.
  • After successfully installing the firmware, the device will set up its Wi-Fi hotspot using the exact name given for the device within the firmware’s code. Join this network.
  • Access the web interface of your device. Log in using the username “admin” and password “admin” to login.
  • Copy the data in the “Connection Information” window into the fields in the “Credentials” tab. After filling in all fields, press Save.
  • Verify that your PC remains connected to your device’s wireless hotspot. Go to”Wi-Fi,” click the “Wi-Fi” tab, and select “Scan.”
  • Choose your Wi-Fi network in the drop-down list and enter its password to connect. Reconnect to your Wi-Fi connection and sign in to the developer account. From the home page, shut down the browser and enter the details for your connection. Be aware of your device’s status. Once you have changed the device’s web interface configurations, its status should be changed.
  • The gadget’s latest sensor information will be shown by clicking “Preview State” or the “Preview State” link.
  • Select the “Add layout” button and alter the look and appearance of the mobile app to control the device. After installing an SDK-based firmware on the Wi-Fi router, widgets are ready to be used by enabling notifications and updates.
  • After saving the configuration interface, you can click on after saving the interface, click on “Upload firmware” link and transfer the firmware bin to the platform. The file can be found in the firmware folder.
  • Select “Publish” and confirm your intention to launch the new product onto the platform.

Best Ways To Manage Software Updates And Maintenance For IoT devices

IoT devices are linked to the internet and perform different tasks, such as gathering information, regulating appliances, or monitoring systems.

However, they must be regularly updated to correct bugs, increase security, or introduce the latest features.

Make Sure You Choose The Best Upgrade Method

Many methods are available for updating the firmware on IoT devices, depending on the type of device, activity to networks, and the frequency of updates.

 Updates permit software updates to be transmitted wirelessly, without the need for cables or physical access, but they need more capacity in terms of security and reliability.

 You can also take help of Firmware Consulting services to make updates. Serial updates require linking the device with a computer or programming device through a serial port.

They provide greater security and reliability. However, they need manual intervention and physical access. Updates for memory cards are straightforward and speedy. 

Set The Frequency Of Updates And Timetable

Firmware updates should be designed according to frequency and timing. They should consider the device’s functionality, users’ expectations and concerns, and the size of updates. 

For example, a smart thermostat could require periodic updates more than an intelligent bulb because of its size and complexity.

 In the same way, an individual who is looking for the most recent technology and features could expect to receive more frequent updates than a user who is looking for stability. 

In addition, a smart lock might be at risk of security issues compared to a speaker because it is a much more valuable asset. 

Additionally, major upgrades with new functions or altering the software architecture could be more significant than minor updates that fix bugs or add a new function.

Check The Update Before The Deployment

Testing Custom Linux Firmware updates before release is vital to verify their compatibility, quality, and usability. 

For this, checking the firmware updates on various platforms and devices and in multiple scenarios using different methods and tools is recommended. This includes unit testing that confirms the integrity and accuracy of the software; integration testing, which tests how multiple components and modules interact; and system testing, which evaluates the entire firmware and its interaction with the hardware, network, and user.

 So, you’ll be able to confirm its capabilities and efficiency in addition to the reliability and usability of it.

Be Sure To Monitor The Changes After The Deployment

Monitoring the firmware update after the deployment is crucial to guarantee that it is successful and has feedback and improvements. It is essential to keep track of the firmware updates across different networks, devices, and sites by employing various indicators and metrics.

 Analyzing and collecting user feedback, like reviews, ratings, survey responses, or comments, can determine the level of satisfaction and engagement among users. 

Furthermore, analyzing and collecting information from devices is a way to evaluate their effectiveness and functionality.

Additionally, studying and collecting device logs will determine the activity amount and how communication is conducted. These methods can help to find any issues or glitches with firmware upgrades.


Software development kits (SDK) can be described as a collection of tools for software development that allow you to develop applications that work with specific software packages, software framework systems, or similar platforms for growth. 

We hope you enjoyed the reading experience and learned how to create SDK-based firmware to support IoT devices in 2024. 

It is essential to ensure the Wi-Fi relay functions efficiently and is managed from your mobile application. You could flash all the batches of devices. 

This is the final firmware update that is done via USB cable. Because of SDK-based custom firmware usage, future upgrades will occur via the internet.