<![CDATA[Calling crane operators in industrial areas is still frequently performed manually through voice signals, direct communication, or conventional communication devices. These methods have notable limitations, particularly in noisy work environments, across long communication distances, or in spatial conditions where direct communication is unfeasible. This study aims to design a crane operator calling system based on Arduino and the LoRa E32 communication module as an efficient, low-power, and easily deployable long-range wireless communication medium. The system consists of a transmitter unit utilizing buttons, Arduino, and LoRa E32 to send data, as well as a receiver unit that processes incoming call signals to activate indicators such as a buzzer, I2C LCD, or information display. The testing methodology was comprehensively conducted, covering local component functionality and wireless signal transmission range. The functional testing results indicated that the push button, 16x2 I2C LCD, and buzzer operated optimally with a 100% success rate. Furthermore, the wireless transmission test results demonstrated that the system achieves an effective operational range of up to 180 meters in an industrial environment with stable data delivery and zero packet loss. When the distance exceeds 180 meters, communication performance begins to suffer signal degradation. By utilizing LoRa E32, this system is expected to increase communication effectiveness, reduce the risk of miscommunication, and support occupational safety in industrial environments.]]>
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