RS-485
RS-485 is a standard defining the electrical characteristics of drivers and receivers for use in balanced digital multipoint systems, commonly used for serial communication in industrial and automation applications. It supports long-distance communication (up to 1200 meters) and allows multiple devices (up to 32) to be connected on a single bus, making it ideal for networks like Modbus or Profibus. Unlike RS-232, it uses differential signaling for noise immunity and half-duplex communication.
Developers should learn RS-485 when working on industrial automation, building control systems, or IoT projects that require reliable, long-range communication between multiple devices in noisy environments. It's essential for implementing protocols like Modbus RTU or Profibus in manufacturing, HVAC, or energy management systems, where robustness and multi-drop capability are critical.