23.4. Case 23: Face-tracking with TPBot¶
MakeCode Programming¶
- Click “Advanced” to see more choices in the MakeCode drawer.
- We need to add a package for programming. Click “Extensions” in the bottom of the drawer and seach with “tpbot” in the dialogue box to download it.
- We need to add a package for programming the AI Lens kit. Click “Extensions” in the bottom of the drawer and seach with
https://github.com/elecfreaks/pxt-PlanetX-AI
in the dialogue box to download it.
Sample Code¶
- Initialize the AI lens kit in the On start brick and switch its function to face recognition.
- In forever brick, get an image from the AI lens and adjust TPBot’ direction by the face recognized in the lens.
- Complete code:
Reference¶
- Link: https://makecode.microbit.org/_i4aLd1MvADLU
- You may also download it directly here:
Python Programming¶
Add TPBot extension: https://www.elecfreaks.com/learn-cn/microbitKit/TPbot_tianpeng/TPbot-python.html
Add AI Lens extension: https://www.elecfreaks.com/learn-cn/microbitplanetX/ai/Plant-X-EF05035-python.html
Code¶
# Add your Python code here. E.g.
from microbit import *
from AILens import *
from TPBot import *
tp = TPBOT()
ai = AILENS()
# Set the function of AI Lens in face recognition
ai.switch_function(Face)
while True:
# Get an image
ai.get_image()
buff = ai.get_face_data()
# "buff[0]"means the X coordinates data of the face detected in AI lens
i = buff[0]
if ( i < 80):
tp.set_motors_speed(-30,0)
elif ( i > 144):
tp.set_motors_speed(0,-30)
else:
tp.set_motors_speed(0,0)
Result¶
The TPBot changes its heading direction in accordance with the face the AI Lens detects.
Exporation¶
FAQ¶
Q: TPBot doesn’t work with the sample code.A: It is probably due to the lack of battery power, please try adding the speed of the TPBot or replacing with new batteries.Q: The AI Lens is not working, and it does not go to the function page with the sample code.A: Please try replacing with new batteries.