Example Code for Raspberry Pi-Wakeup Function

Hardware Preparation

• Raspberry Pi 4B(or similar) x 1
• LIS331HH Triple Axis Accelerometer (Breakout Version) x1
• Jumper wires x1

Software Preparation

• Raspberry Pi Official OS
• Download and install the LIS Series Python Library.

Wiring Diagram

• Connect the module to the Raspberry Pi according to the connection diagram. The default I2C address is 0x19. Connect the int1/int2 pin of the module to the interrupt pin of the Raspberry Pi.

Other Preparation Work

1. Enable the I2C interface of the Raspberry Pi. If it is already enabled, you can skip this step. Open Terminal, type the following command, and press Enter:

   sudo raspi-config
   

   Then use the up and down keys to select "5 Interfacing Options", press Enter, select "P5 I2C", and press Enter to confirm "YES". Restart the Raspberry Pi main control board.

2. To install Python dependent libraries and git, the Raspberry Pi needs to be connected to the Internet. If it is already installed, you can skip this step. In the terminal, type the following commands in sequence, and press Enter:

   sudo apt-get update
   

   sudo apt-get install build-essential python-dev python-smbus git
   

3. Download the LIS series driver library. In the terminal, type the following commands in sequence and press Enter:

   git clone https://github.com/DFRobot/DFRobot_LIS
   

Sample Code

• Run the sample code by typing the following commands in the terminal:

  cd DFRobot_LIS/tree/master/python/raspberrypi/examples/LIS331HH
  

  cd wake_up
  

  python wake_up.py
  

Result

• When the interrupt event occurs, the terminal will print the acceleration data and the mode change (from sleep mode to normal mode).