├── PoweredUp Code Blocks for 60337 Express Passenger Train.pdf
├── README.md
└── pybricks-code-for-60337-express-passenger-train.py


/PoweredUp Code Blocks for 60337 Express Passenger Train.pdf:
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https://raw.githubusercontent.com/eggybricks/poweredup-color-sensor/HEAD/PoweredUp Code Blocks for 60337 Express Passenger Train.pdf


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/README.md:
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1 | # Code examples for PoweredUp color sensor with trains
2 | 
3 | Code examples for how to use a LEGO® color sensor to automate a LEGO® train with (1) Pybricks and (2) PoweredUp code blocks to go back and forth forever.
4 | 
5 | LEGO® is a trademark of The LEGO Group of companies, which does not in any way sponsor, authorize, or endorse this content. 
6 | 


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/pybricks-code-for-60337-express-passenger-train.py:
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 1 | from pybricks.pupdevices import ColorDistanceSensor, DCMotor # ColorSensor instead of ColorDistanceSensor if using Mindstorms sensor
 2 | from pybricks.parameters import Color, Port
 3 | from pybricks.tools import wait
 4 | 
 5 | motor = DCMotor(Port.A)
 6 | sensor = ColorDistanceSensor(Port.B) # ColorSensor instead of ColorDistanceSensor if using Mindstorms sensor
 7 | 
 8 | station_stop_time_ms = 2500
 9 | eol_stop_time_ms = 5000
10 | forward_speed = 20
11 | check_color_interval_ms = 20
12 | 
13 | def check_for_color(color):
14 |     while sensor.color() != color:
15 |         wait(check_color_interval_ms)
16 | 
17 | while True:
18 |     print("looking for green")
19 |     check_for_color(Color.GREEN)
20 | 
21 |     print("green detected, at station, stopping and continuing")
22 |     motor.brake()
23 |     wait(station_stop_time_ms)
24 |     motor.dc(forward_speed)
25 | 
26 |     print("looking for yellow")
27 |     check_for_color(Color.YELLOW)
28 | 
29 |     print("yellow detected, at end of line, stopping and going back to station")
30 |     motor.brake()
31 |     wait(eol_stop_time_ms)
32 |     motor.dc(-forward_speed)
33 | 
34 |     print("looking for green")
35 |     check_for_color(Color.GREEN)
36 | 
37 |     print("green detected, at station, stopping and continuing")
38 |     motor.brake()
39 |     wait(station_stop_time_ms)
40 |     motor.dc(-forward_speed)
41 | 
42 |     print("looking for red")
43 |     check_for_color(Color.RED)
44 | 
45 |     print("red detected, at end of line, stopping and going back to station")
46 |     motor.brake()
47 |     wait(eol_stop_time_ms)
48 |     motor.dc(forward_speed)
49 | 


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