23.1. Case 20: Road Indicator for TPBot with AI Lens¶
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 cards recognition.
- In forever brick, get an image from the AI lens, if the image contains the traffic signals of driving forward, set the TPBot to drive at the speed of 40%.
- If the image says turn left, set the TPBot to turn left at the speed of 30% for 0.5s and keep driving forward. As the AI Lens has three buffer zones, here we need to repeat collecting image for three times and discard to clear the buffer.
- If the image says turn right, set the TPBot to turn right at the speed of 30% for 0.5s and keep driving forward. As the AI Lens has three buffer zones, here we need to repeat collecting image for three times and discard to clear the buffer.
- If the card says stop, stop the TPBot immediately.
- Complete code:
Reference¶
- Link: https://makecode.microbit.org/_c5tFg4d3RRsF
- 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¶
from microbit import *
from AILens import *
from TPBot import *
tp = TPBOT()
ai = AILENS()
# Set the function of AI Lens in cards recognition
ai.switch_function(Card)
while True:
# Get an image
ai.get_image()
if (ai.get_card_content() == "Forward"):
tp.set_motors_speed(40,40)
if (ai.get_card_content() == "Turn left"):
tp.set_motors_speed(0,30)
sleep(1000)
tp.set_motors_speed(40,40)
# Repeat getting images for three times to clear the buffer zones
i = 0
while i < 3:
ai.get_image()
i += 1
if (ai.get_card_content() == "Turn right"):
tp.set_motors_speed(30,0)
sleep(1000)
tp.set_motors_speed(40,40)
# Repeat getting images for three times to clear the buffer zones
i = 0
while i < 3:
ai.get_image()
i += 1
if (ai.get_card_content() == "Stop"):
tp.set_motors_speed(0,0)
Result¶
The TPBot acts as the cards indicate, if the card contains moving forward signal, it drives forward; if it is turning left signal, the TPBot turns left and goes forward; if it is turning right signal, the TPBot turns right and goes forward; if it is stop signal, the TPBot stops moving.
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.