Intelligent medicine delivery trolley for epidemic prevention based on stm32 microcontroller

This paper describes an intelligent medicine delivery trolley for epidemic prevention using the STM32 microcontroller. The system adopts power control unit with I / O interface. It realizes the forward and turning operation of the vehicle through PWM duty cycle modulation and the speed difference of reduction motor; The obstacle avoidance of the car is successfully completed by using the hc-sr04 ultrasonic ranging system in the front of the car. In addition, the hc-05 Bluetooth module is used to realize remote control. Finally, this design realizes the real human-machine interaction via Bluetooth and mobile APP.