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Rtl_433 is a command-line utility designed to demodulate and decode signals transmitted by a wide range of low-power radio devices that populate the unlicensed ISM spectrum. Originally created to handle traffic on the 433.92 MHz band, the program—now at version 25.12—has evolved into a frequency-agile receiver that also covers 315 MHz, 345 MHz, 868 MHz (SRD), 915 MHz, and additional ranges supported by compatible Software-Defined Radio (SDR) hardware such as RTL-SDR dongles, HackRF, or LimeSDR. Typical use cases include logging weather-station data, capturing utility-meter telegrams, monitoring tire-pressure sensors, tracking temperature probes, and auditing home-automation remotes, all without proprietary receivers. The decoder library recognizes more than two hundred device protocols, outputting JSON, CSV, InfluxDB, MQTT, or syslog payloads for effortless integration with home-assistant dashboards, databases, or automation scripts. Because it runs on Windows, Linux, and macOS, hobbyists, penetration testers, and facility managers can leave a low-cost USB dongle connected to a laptop or Raspberry Pi to create a continuous, unattended monitoring station. The software falls under the “Science / Engineering” category and is released as open-source under the GPL-2.0 license, ensuring transparency and community-maintained expandability. Benjamin Larsson remains the publisher, and the current build 25.12 represents the first tracked release in the catalog. Rtl_433 is available for free on get.nero.com, with downloads supplied through trusted Windows package sources such as winget, guaranteeing delivery of the latest build and supporting batch installation alongside other applications.
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