In this video I show you how to build a DIY motion tracking project with a Raspberry Pi 3. The project is autonomous so it moves and fires the gun when it detects motion. I used laser module for this project, but you can easily change modify this build to use a Nerf instead.This project allows you to detect and track a person with OpenCV and then trigger a device (such as a laser or gun).
Full tutorial for motion tracking: https://youtu.be/iwlfiDtddlg
- Make sure pip is installed
https://www.pyimagesearch.com/2018/09/19/pip-install-opencv/
sudo apt-get install python pip
-
Install OpenCV 3. Follow all steps for python 3 instructions
https://www.pyimagesearch.com/2016/04/18/install-guide-raspberry-pi-3-raspbian-jessie-opencv-3/ -
Setup I2C on your Raspberry Pi
https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c -
Install the Adafruit stepper motor HAT library
sudo pip install git+https://github.com/adafruit/Adafruit-Motor-HAT-Python-Library
- If you are using a Raspberry Pi Stepper Motor Expansion Board other than the Adafruit Stepper Motor HAT (just like in the video), then update the I2C address or frequency value with the following. (This address is only compatible with the board in the video, default value is blank for Adafruit Stepper Motor HAT)
self.mh = Adafruit_MotorHAT() to self.mh = Adafruit_MotorHAT(0x6F) in the source code (mertracking.py)
for mor details: http://www.raspberrypiwiki.com/index.php/Robot_Expansion_Board
- Make sure to create your virtual environment with the extra flag
mkvirtualenv cv --system-site-packages -p python3
- Source your bash profile
source ~/.profile
- Open Terminal and Activate your virtual environment
workon cv
- Clone this repository
git clone git@github.com:MertArduino/RaspberryPi-Mertracking.git
- Navigate to the directory
cd RaspberryPi-Mertracking
- Install dependencies to your virtual environment
pip install imutils RPi.GPIO
- Run the Code
python mertracking.py
mertracking.py has a couple parameters that you can set
MOTOR_X_REVERSED = False
MOTOR_Y_REVERSED = False
MAX_STEPS_X = 20
MAX_STEPS_Y = 10
RELAY_PIN = 22
self.mh = Adafruit_MotorHAT(0x6f) I2C Address or Frequency
self.sm_x.setSpeed(5) Speed of the Stepper Motor 1
self.sm_y.setSpeed(5) Speed of the Stepper Motor 2
self.sm_x = self.mh.getStepper(200, 1) Steps/Rev of the Stepper Motor 1
self.sm_y = self.mh.getStepper(200, 1) Steps/Rev of the Stepper Motor 2
time.sleep(1) Delay Time for the Relay Trigger
Adafruit_MotorHAT.MICROSTEP You can change the step type with the following commands
MICROSTEP
SINGLE
DOUBLE
INTERLEAVE