You’ve created a connected device, but to ensure it remains at the cutting edge of innovation, there’s one essential thing to bear in mind: OTA (Over-The-Air) updates. Often overlooked and sometimes dealt with towards the end of the project, this
You’ve created a connected device, but to ensure it remains at the cutting edge of innovation, there’s one essential thing to bear in mind: OTA (Over-The-Air) updates. Often overlooked and sometimes dealt with towards the end of the project, this
You’ve created a connected device, but to ensure it remains at the cutting edge of innovation, there’s one essential thing to bear in mind: OTA (Over-The-Air) updates.
Often overlooked and sometimes dealt with towards the end of the project, this stage is nevertheless crucial.
Now, you might be wondering: “What is an OTA update and why is it so important?”
In a nutshell, think of it as the “sun” that powers your connected device, providing it with new features, performance improvements and vital security patches.
In this article, we’ll delve into the details of OTA updates for connected devices with real-world examples. We’ll show you how to think strategically about updating your connected device and the common pitfalls to avoid.
Over-the-air updates are already a common part of our daily lives.
You know, when you sometimes get a notification on your phone saying “An update is available! Update now?”. You click “Yes”, and hey presto, without lifting a finger, your device is transformed with new features and optimised performance.
Well, that’s what we call an OTA update!
Remote updates, also known as OTA updates, also apply to connected devices.
An OTA update is a process that allows you to update a device’s embedded software without needing to physically connect it to a computer.
This means your product can benefit from improvements, bug fixes or new features without you having to intervene directly.
Convenient, isn’t it?
But how does it work?
An OTA update relies on a wireless connection that allows a connected device to communicate with a remote server to check for the availability of a new version of its software.
When a new update is available, the device can then download the new software, verify it and install it.
The installation phase may sometimes require user intervention, but in most cases, it happens automatically.
This convenient, automated process ensures a smooth and secure experience for end users, whilst offering manufacturers and developers an efficient way to update and improve their products without costly hardware recalls.
As you will have realised, remote updates offer numerous benefits. Let’s explore what these are.
It enables security patches to be sent to your products in real time. This helps to protect your users’ sensitive data and avoid unpleasant surprises caused by cyberattacks.
In other words, updates fix potential vulnerabilities to act as a ‘barrier’ against cyberattacks.
And as we know, the main risk is to users’ data.
Updates therefore provide enhanced and continuous protection for users’ data.
The world of technology is constantly evolving, and these changes are happening rapidly.
Standards and regulations are also subject to frequent changes. Your product must remain compliant with these.
OTA updates ensure your product always meets market demands and industry standards. This allows you to adapt quickly to new communication protocols and current regulations, whilst anticipating future trends.
It is also a way to capitalise on new technologies and stay one step ahead of your competitors.
As we know, the key to success is the user experience. Remote updates offer unrivalled responsiveness to any issues your users may encounter and allow you to continuously improve your product.
Thanks to OTA updates, you can gradually enhance the features of your connected device and improve its performance, including battery life, to deliver an ever more satisfying experience.
Issues reported by your users can be quickly resolved, meaning they will benefit from more frequent updates and real-time problem-solving, which will significantly improve their satisfaction and trust in your product.
Each OTA update can bring significant improvements to the user experience. For example, you can:
Thanks to this continuous improvement approach, your connected device can remain competitive in the market, retain existing users, and attract new customers with a product that is always at the cutting edge of innovation.
OTA updates can prove to be a real game-changer when it comes to reducing long-term costs!
By resolving issues at the earliest opportunity, you prevent them from turning into major problems for your products, thereby enabling you to make significant savings on support and maintenance.
It also helps prevent large-scale product returns once the problem becomes more serious.
Thanks to these discreet and rapid updates, you save resources and avoid the costs associated with large-scale returns.
Before embarking on the journey of remote updates, it is essential that this functionality has been planned for in advance during the product’s design phase.
Next, several steps are required to ensure a successful OTA update.
Firstly, you need to choose how your product will communicate with the server. It’s a bit like deciding on the mode of transport for your message!
You can use wireless technologies such as 4G, 5G, LTE-M, NB-IoT or Wi-Fi to transmit data.
It is important to take data throughput into account, i.e. the speed at which data travels relative to the size of the update.
And of course, you must also consider the financial and energy costs, especially if your product runs on a battery.
We also recommend this article to help you choose your IoT network.
You must also ensure that your communication channel is secure.
To do this, use secure communication protocols such as HTTPS, which encrypt data exchanges to prevent any malicious interception.
We want to prevent spies from accessing your product’s confidential information.
Maintenant, que le mode de transport est choisi et sécurisé, passons aux étapes de la mise à jour :
In order to distribute the software, you need to build it. This is what we call the firmware build!
You need to build your product’s embedded software, assign it a version number and sign it to confirm that it originates from you and has not been altered along the way.
The device then ensures that the software does indeed come from the build server by verifying the signature.
Your firmware must be tested to ensure that your product’s existing features still work correctly.
You must also verify that any new features added or bugs fixed are operational.
Finally, you must ensure that you validate the product’s backward compatibility and interoperability with its environment.
What does this mean in practice?
Backward compatibility of a product refers to its ability to function seamlessly with its older versions, as well as with previous versions of other components with which it interacts.
In other words, if the old version uses a particular method to write to a database, once the update has been carried out, the new version must be able to understand what the old version has stored, whilst ensuring that the product continues to function correctly overall.
For example, Sony’s PlayStation 2 is capable of playing PlayStation 1 games, which demonstrates successful backward compatibility.
Whereas product interoperability refers to its ability to always communicate and interact with other products in its environment.
Take the example of Amazon’s Alexa voice assistant: after an update, it must remain compatible with products in its environment manufactured by other companies.
In other words, once the update has been carried out, it must be able to continue communicating correctly with the connected lights, switches and blinds in that environment.
Once you have prepared your firmware, it is time to deploy it to a reliable secure server.
This step is crucial to ensuring the integrity and confidentiality of your software. Several update management platforms, such as Rtower from Rtone or AWS Amazon, are available to facilitate this process.
These platforms play a vital role in communicating with devices and delivering the appropriate updates. Here are the key steps in this phase:
Using a reliable and secure update management platform allows you to manage your updates efficiently and, above all, to ensure secure communication.
Now, your product must download the software. To enhance security, you can implement two-factor authentication: the server ensures it is communicating with the correct product, and the product verifies that it is communicating with the correct server.
You should also consider using a secure protocol such as HTTPS to encrypt data exchanges. Your software may contain confidential data. You must avoid using unsecured or obsolete protocols to prevent any risk of hacking or malicious interception.
Dealing with the unexpected also requires planning ahead. Indeed, ensuring a smooth update, despite power cuts or internet outages, is essential.
To achieve this, you must put in place a mechanism to resume the process from where it left off on the next attempt.
Once the download is complete, enhance your security by carefully verifying the firmware signature and ensuring the software’s integrity using hashing mechanisms, such as SHA-256.
By taking these precautions, you significantly increase your chances of successful remote updates!
It is essential to take into account the GDPR aspect, particularly for consumer products. Indeed, during installation, ensure you do not force the update without notifying users, unless the product’s terms and conditions of sale or use have already mentioned this possibility.
Otherwise, you must inform customers of this feature in advance, for example via a notification.
Whatever the situation, users must always have the option to accept or decline updates to ensure their consent and control over their data.
To do this:
Once the firmware is installed, ensure it boots correctly by implementing a validation system to determine when the firmware can be considered valid or invalid.
If the firmware is invalid, it is best to revert to the previous version provided this poses no security risk.
However, if the previous version contains a security flaw, it is not recommended to reinstall it.
In such cases, if the product has a recovery version, it is best to apply this version to avoid any potential risk.
With these key steps, you are now ready to implement secure and efficient OTA updates!
Knowing how to implement updates is all well and good, but we can go even further! Now, let’s explore the best practices for optimising this process and its management.
We recommend that you define a long-term update strategy for your connected product.
Schedule regular update cycles to keep your product up to date and responsive to your users’ changing needs.
The aim is to have a clear vision of the new features and fixes you wish to implement throughout your product’s lifecycle.
It is essential to anticipate and put in place mechanisms to manage errors that may occur during the update process.
Provide recovery solutions in the event of an update failure, such as a backup firmware or the option to revert to the previous version of the software.
Also ensure you provide clear and understandable error messages for users in the event of a problem, so that they can easily understand the actions to take.
We cannot stress this enough: the testing phase is absolutely crucial!
Before deploying a remote update across your entire fleet of connected devices, carry out thorough testing to ensure stability and compatibility with older versions already in use.
This involves testing under real-world conditions, particularly to verify that it functions correctly and does not conflict with other product components.
You can also implement validation procedures to check that your product is still working correctly after the update.
Once your product is up to date, it’s time to let its performance shine!
It is essential to closely monitor how your product is performing since the update, but that’s not all… You can also gather user feedback to assess their satisfaction or identify any potential issues.
This will allow you to respond quickly in the event of a malfunction and provide any necessary additional fixes.
To keep your connected devices in top condition, it is important that they operate at peak performance whilst optimising their energy consumption.
After all, we know just how valuable your products’ bandwidth and energy are.
The key? Provide deferred update options to allow users to choose the ideal time based on their network or battery constraints.
With this approach, you avoid unnecessary updates and maximise the efficiency of remote management.
In the world of connected devices, security must be the number one priority.
To achieve this, you must regularly update security protocols to stay protected against new threats.
To take it a step further, you can also offer encrypted updates to enhance data confidentiality during the update process.
With these bespoke security shields, you significantly strengthen the protection of your users’ data.
It is important never to leave your users in the dark and to build a relationship of trust.
Make sure you always keep them informed about the frequency of updates and the benefits they bring.
You can also clearly explain the consequences of not carrying out updates.
In short, remote updates are essential for keeping your connected devices up to date and providing them with new features, whilst enhancing security.
These best practices enable you to ensure effective management, thereby contributing to user satisfaction and the longevity of your products.
The Babycook Smart® project from Béaba® offers parents the chance to prepare healthy meals tailored to their babies’ specific needs.
At Rtone, we designed the Babycook Smart® connected smart food processor from start to finish, in line with industry standards.
A ‘release’ with different development versions was implemented to ensure that the control electronics for the screen, Wi-Fi and recipe engine could work together.
OTA updates are crucial to ensure that Babycook Smart® users benefit from the latest features, optimisations and fixes.
Interaction between the product and the server takes place in the background; once a new update has been downloaded, a notification system informs users of its availability.
Thanks to OTA updates, the Babycook Smart® is constantly evolving and improving, offering an ever more comprehensive and secure user experience.
As we have seen, OTA updates are much more than just a technical procedure… They are essential for keeping your connected devices at the cutting edge of innovation.
This crucial step must be carefully planned in advance; neglecting it could compromise your users’ security and risk losing their trust.
Thanks to remote updates, you can easily fix security vulnerabilities in real time, adapt to standards and technological developments, improve features to retain your users, reduce long-term costs and much more!
But OTA updates don’t stop there!
Technologies are constantly evolving and new trends are emerging.
From the integration of artificial intelligence for even more personalised updates, to the use of 5G for ultra-fast downloads, and biometric security to guarantee the authenticity of every update, the future of OTA updates is exciting and full of promise!
So stay informed and don’t hesitate to contact us to discuss your projects and design innovative solutions together! 💻🌟
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