RFID Tags
RFID (Radio-Frequency Identification) tags are small electronic devices that use radio waves to transmit data wirelessly to an RFID reader. They consist of a microchip and an antenna, and are used for automatic identification and tracking of objects, animals, or people. RFID tags can be passive (powered by the reader's signal), active (with their own battery), or semi-passive, and are widely deployed in logistics, retail, access control, and inventory management.
Developers should learn about RFID tags when building systems for supply chain tracking, asset management, or contactless identification, as they enable real-time data capture without line-of-sight requirements. This is particularly useful in applications like warehouse automation, smart retail (e.g., self-checkout), and security systems, where efficiency and accuracy are critical. Understanding RFID integration helps in designing IoT solutions and embedded systems that interact with physical objects.