Plantar pressure distributions are essential and valuable measures in sports shoe assessment, diabetic ulcer detection, clinical gait analysis, pathological foot diagnosis, and medical orthotic fabrication. However, current plantar pressure measurement and examination systems are less comfortable to wear and expensive. This paper presents the measurement and analysis of plantar pressure inside the shoe, a system based on a set of sensors for plantar pressure and blood oxygen saturation built into the shoe, which is soft and light, has high-pressure sensitivity, and predicts the possibility of ulcer formation. The sensors connect to the Mega 2560 microcontroller to obtain data from the sensors inside the insole and transmit the data wirelessly via the Internet of Things technology to the smart mobile phone via Wi-Fi, an alarm is sent to the user interface to notify the user or health care providers, the alerts will be set according to the values of Sensors to inform the user of the ultimate risk of disease caused by these parameters. The system can be conveniently configured to operate in research laboratories, hospitals, sports stadiums, and other out-of-door environments. After obtaining the results, the sensors supported more than 42% of the body weight, where the accuracy of the sensors was (± 2.04 N ~ 0.20 kg) for the plantar pressure sensor, and (± 2%) for the oxygen saturation sensor.
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