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The objective of this research was to develop an indoor mobile asset tracking system with low cost, to assist in conveniently tracking and monitoring hospital mobile x-ray machines with higher efficiency and accurate services. The system was developed to be able to display the location and search for mobile x-ray machines in real-time and to report the usage history of the machines. The systems used modern IoT technology consisting of MCU nodes with WiFi sets, various sensor modules and wireless communication modules and comprised two parts: a program for sending and receiving data from the nRF24L01 wireless communication at 2.4 GHz, and an application for configuration and reporting results. The results of the performance of two developed systems tested in a short period at Songkhla Hospital, Songkhla Province indicated that the efficiency of the correctness in location identification fell at average values of 88.13 per cent and 90.63 per cent, that both were not at a significantly different level of 0.05. Furthermore, the system's quality had been tested by the radiologists at Songkhla Hospital who showed satisfaction for its all aspects.
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