Why Infrared Remains Superior to Modern Smart Home Protocols
Fifty-year-old infrared technology offers unique reliability and direct control that modern wireless protocols lack.
1Enduring Legacy of Infrared
Infrared technology has remained a staple in consumer electronics since the early 1980s. Despite the rise of sophisticated protocols like Wi-Fi, Zigbee, Thread, and Matter, infrared continues to function reliably. Its simplicity allows for direct communication between a remote and a target device, bypassing the need for complex intermediary network infrastructures.
2Network Independence and Reliability
Modern smart home protocols often depend on local area networks or specific coordinators to function. If a Wi-Fi network fails, connected controls typically stop working. Conversely, infrared operates independently of network stability. As long as a clear line of sight exists between the transmitter and receiver, the command will execute successfully.
3Bridging Dumb and Smart
Many legacy devices, such as older stereos or projectors, lack modern connectivity like Wi-Fi or Ethernet. Infrared serves as a vital bridge, enabling these devices to be controlled remotely. It effectively integrates non-smart hardware into a modern ecosystem, ensuring that older equipment remains functional and relevant within a contemporary home setup.
4Centralizing Control via Blasters
Managing dozens of individual remotes is inefficient for modern users. IR blasters solve this by reproducing infrared signals, either by learning codes or using existing command libraries. DIY enthusiasts can even construct custom blasters using an ESP32 and an infrared LED, centralizing control for various devices into one unified interface.
5Native Integration in Home Assistant
The Home Assistant 2026.4 update introduced native infrared support, transforming how users manage these signals. Compatible IR blasters now function as infrared proxies, allowing devices to appear directly in the dashboard. This integration eliminates the need for manual script creation for every button, streamlining the user experience for non-smart hardware.
6Line of Sight Limitations
Infrared is not without significant technical drawbacks compared to wireless mesh networks. The requirement for a clear line of sight means physical obstructions can easily block signals. If a person walks between the remote and the device, the command fails, which is a limitation not shared by radio-frequency based smart protocols.
7Lack of Feedback Loops
Communication in infrared systems is typically one-way, meaning the device does not acknowledge receipt of a command. This creates synchronization issues, particularly with power toggle commands. If a user sends a signal to turn on an air conditioner, there is no confirmation, potentially leaving the device in an unintended state.
8Strategic Protocol Selection
While modern protocols offer advanced features, infrared remains an essential tool for specific use cases. The most effective smart home strategy involves leveraging the strengths of different technologies rather than relying on one. Infrared provides a cheap, effective, and reliable method for controlling legacy devices that would otherwise remain completely disconnected.
Original article: How-To Geek — Why Infrared Remains Superior to Modern Smart Home Protocols