Applying pressure and temperature and humidity sensors to detect the effect between plaster and fake arm

To detect the pressure, temperature, and humidity values under a plaster, this study established a system involving the Arduino Uno micro controller unit with six pressure sensors and a temperature and humidity sensor. An experiment was conducted with a fake arm to prevent the sensor placed in the plaster from causing compression. The accuracy of the pressure sensors and the temperature and humidity sensor was confirmed through a verification experiment. The experiment comprised a short-arm cast and short-arm splint. Four pressure and force conversion factors were used to calculate the pressure by automatically changing the range conversion factor using a program. The error of the verification result was within an acceptable range. Therefore, the detected values were determined to have credibility. They can provide clinicians with a reliable estimate for the practice of plaster treatment and can be objectively referenced. The user interface displays the values, grades the values, and stores the data in the database. Thus, the interface is convenient for clinicians.