Welcome to 16-channel Servo Debugging Board repository

IIC control servo

1. Learning goals

In this course, we mainly learn to use Jetson NANO and 16-channel servo debugging board to control the servo through IIC.

2. Preparation

Connect the SDA and SCL of the module to the SDA and SCL pins of the Jetson NANO board. VCC and GND are connected to 3.3V and GND of Jetson NANO respectively. As shown below.

2.2 You need to open the IIC service of jetson NANO board.

2.3 Install I2Ctool

Input following command in command terminal,

sudo apt-get update

sudo apt-get install -y i2c-tools

Wait patiently for the successful installation to complete.

2.4 Check whether the installation is successfully

Input following command in command terminal,

apt-cache policy i2c-tools

If system output is as follows, the installation is successful.

i2c-tools:

Installed: 4.0-2

Candidate: 4.0-2

Version list:

*** 4.0-2 500

500 http://ports.ubuntu.com/ubuntu-ports bionic/universe arm64 Packages

100 /var/lib/dpkg/status

2.5 Scan all i2c devices on a certain bus, and print out the device i2c bus address.

sudo i2cdetect -y -r -a 1

2.6 Install smbus

Input following command in command terminal,
sudo apt-get update
sudo apt-get install -y python3-smbus

3. Module protocol

4. Code

About code, please view 16CServo-iic.py file.

4.1 Define the device address of the module

4.2 Initialize IIC communication

4.3 Set the angle of the servo S1 to 0

5. Running code

Input following command in command terminal of jetson nano.

python3 16CServo-iic.py

6. Experimental phenomena

After the program is run successfully. The servo will rotate 0°, after 2s it will rotate 180°.