Picture 1:Connect PCA9685 compatible board to raspberry pi board as per picture 1.
Picture 2:Connect Model Pi six control pins to the Raspberry Pi GPIO pins and PCA9685 PCA9685 Compatible module as picture 2.
Picture 3: Model Pi connection map to Raspberry Pi board as per picture 3.
Steering Servo connect to port 15 of PCA9685
Software Download and Running
wget http://osoyoo.com/driver/servo-steer-car/pi-basic.py python pi-basic.py
After above python is running, you motors will move forward and then move backward , and turn left for then turn right, then back to right and finally back to left.
You can read the sample python code in https://osoyoo.com/driver/p3-car/v3car-basic.py . If you have some basic python knowledge, you can easily understand how to customize the code for your own application.
DownLoad Url osoyoo.com