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RSSI stands for "Received Signal Strength Indicator," a metric used in wireless communication systems to quantify the strength of the signal received by a receiver device from a transmitter or access point. Measured in decibels (dB), RSSI represents the power level of the received signal relative to a reference level, typically the maximum possible signal strength. RSSI values provide valuable information about the quality of the wireless connection, allowing users to assess signal strength, signal coverage, and potential interference in a given environment. In wireless networking applications, such as Wi-Fi, Bluetooth, or cellular networks, RSSI is used to evaluate the performance and reliability of the communication link, helping users optimize device placement, antenna orientation, and network configuration to achieve better signal reception and data throughput. While RSSI can provide a rough estimate of signal strength, it is susceptible to variations caused by factors such as distance from the transmitter, obstacles in the signal path, electromagnetic interference, and environmental conditions, making it important to interpret RSSI values in conjunction with other metrics such as signal-to-noise ratio (SNR) and data throughput rates for a comprehensive assessment of wireless network performance. Despite its limitations, RSSI remains a widely used parameter in wireless communication systems for monitoring signal strength and optimizing network performance in diverse applications ranging from telecommunications and networking to IoT devices and industrial automation.