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Reverse-engineering infrared-based electronic shelf labels

2026-04-22 | original

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Why This Matters

This article highlights the vulnerabilities of infrared-based electronic shelf labels (ESLs), revealing how they can be reverse-engineered and potentially manipulated. Understanding these security flaws is crucial for the tech industry and consumers, as it underscores the importance of safeguarding retail infrastructure against tampering and misinformation. The insights also encourage the development of more secure, transparent, and trustworthy electronic labeling systems.

Key Takeaways

Infrared-based ESLs can be reverse-engineered using open-source tools like PrecIR.
Current ESL systems are vulnerable to manipulation, risking misinformation and security breaches.
Understanding these vulnerabilities can drive the development of more secure electronic shelf labeling technologies.

Reverse-engineering infrared-based electronic shelf labels

For concrete code examples check out PrecIR on Github.

For a compatible USB IR interface check out ESL Blaster.

Why they exist

To consumers, Electronic Shelf Label (ESL) manufacturers list a few pretexts for their existence, often phrased as benefits:

ESLs are ecological: they can be updated and they last for years, it saves paper and ink !

This is utter bullshit. Prices and products don't change that often, and the necessary ressources to make the electronics, batteries, and plastic enclosures that constitute the tags largely outweigh what they would replace in terms of paper and ink.

This is utter bullshit. Prices and products don't change that often, and the necessary ressources to make the electronics, batteries, and plastic enclosures that constitute the tags largely outweigh what they would replace in terms of paper and ink. ESLs provide better price accuracy, what you see is what you'll pay !

Partially true. In practice, most of the time updates are done store-wide at night. Also, the store database is still maintained manually so an important human factor remains.

Partially true. In practice, most of the time updates are done store-wide at night. Also, the store database is still maintained manually so an important human factor remains. The store staff spends less time changing paper labels, allowing them to dedicate more time to the customer !

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Explore topics: ir infrared electronic shelf labels esl blaster precir store automation