Integration

Integration

HC-SR04 Ultrasonic Sensor

Connect the HC-SR04 Ultrasonic Sensor to the STM32F401RE microcontroller as follows:

• VCC to 5V
• Trig to PA8 (D7) Pin (timer 1 - one pulse mode PWM generation)
• Echo to PC1 (A1) Pin (timer 5- input capture time)
• GND to GND

Then you can use the ultrasonic.h library to interface with it.

28BYJ-48 Stepper Motor with ULN2003 Driver

Connect the 28BYJ-48 Stepper Motor to the ULN2003 Driver and then connect the driver to the STM32F401RE microcontroller as follows:

• IN1 to PC0 (A5) Pin
• IN2 to PC1 (A4) Pin
• IN3 to PB0 (A3) Pin
• IN4 to PA4 (A2) Pin
• VCC to 5V
• GND to GND

Then you can use the stepper.h library to control the stepper motor.