42140-app-controlled-transformation-vehicle: Add remote demo.

Add Powered up Remote support for App-Controlled Transformation Vechicle Add variable speed settings via red buttons

Author: tensafefrogs

sets/technic/42140-app-controlled-transformation-vehicle/42140-app-controlled-transformation-vehicle.jpg

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+---
+title: "App-Controlled Transformation Vehicle"
+number: 42140
+image:
+ local: "42131-app-controlled-transformation-vechicle.jpg"
+ credit: "LEGO"
+layout: set
+description: "Fast-action fun in a model that flips! Build and play with 2 vehicles in 1 model with this App-Controlled Transformation Vehicle that flips when it hits a wall"
+---

sets/technic/42140-app-controlled-transformation-vehicle/index.md

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+---
+title: "Powered Up Remote Control"
+maintainer:
+ user: "tensafefrogs"
+ name: "Geoff Stearns"
+image:
+ local: "../42140-app-controlled-transformation-vehicle.jpg"
+ credit: "LEGO"
+description: "Control the Technic App-Controlled Transformation Vechicle with the Powered Up Remote."
+code: "#program"
+---
+
+In this project we'll show you how to control the App-Controlled Transformation Vehicle with the Powered Up remote.
+
+# Program
+
+This program enables control of the flip vehicle with the Powered
+Up Remote.
+
+{% include copy-code.html %}
+
+```python
+{% include_relative main.py %}
+```

sets/technic/42140-app-controlled-transformation-vehicle/powered-up-remote/index.md

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+from pybricks.hubs import TechnicHub
+from pybricks.pupdevices import Motor, Remote
+from pybricks.parameters import Port, Stop, Direction, Button, Color, Side
+from pybricks.tools import wait, StopWatch
+
+# Motor speed
+# Speed levels
+speed_levels = [400, 800, 1470] # Slow, Medium, Fastest
+current_speed_index = 1 # Start with Medium speed
+SPEED = speed_levels[current_speed_index]
+
+# Initialize the hub, motors, and remote
+hub = TechnicHub()
+left_motor = Motor(Port.B)
+right_motor = Motor(Port.A)
+remote = Remote()
+inactivity_timer = StopWatch()
+
+# Increase motor acceleration
+left_motor.control.limits(speed=1470, acceleration=4000)
+right_motor.control.limits(speed=1470, acceleration=4000)
+
+# Variables to track the previous state of the red buttons
+prev_left_button_pressed = False
+prev_right_button_pressed = False
+
+# Main control loop
+while True:
+ # Check which buttons are pressed
+ buttons_pressed = remote.buttons.pressed()
+
+ # Detect single presses on the red buttons
+ left_button_pressed = Button.LEFT in buttons_pressed
+ right_button_pressed = Button.RIGHT in buttons_pressed
+
+ if left_button_pressed and not prev_left_button_pressed:
+ current_speed_index = max(0, current_speed_index - 1) # Decrease speed index
+ SPEED = speed_levels[current_speed_index] # Update SPEED
+
+ if right_button_pressed and not prev_right_button_pressed:
+ current_speed_index = min(len(speed_levels) - 1, current_speed_index + 1) # Increase speed index
+ SPEED = speed_levels[current_speed_index] # Update SPEED
+
+ # Store the current state for the next iteration
+ prev_left_button_pressed = left_button_pressed
+ prev_right_button_pressed = right_button_pressed
+
+ # Determine hub orientation
+ # Note: Slight bugginess when flipping from Orange to Blue side
+ # Might be improved by including FRONT here
+ invert_direction = hub.imu.up() == Side.BOTTOM
+
+ # Control motors with remote
+ left_speed = 0
+ right_speed = 0
+
+ if Button.LEFT_PLUS in buttons_pressed:
+ left_speed = SPEED
+ elif Button.LEFT_MINUS in buttons_pressed:
+ left_speed = -SPEED
+
+ if Button.RIGHT_PLUS in buttons_pressed:
+ right_speed = -SPEED
+ elif Button.RIGHT_MINUS in buttons_pressed:
+ right_speed = SPEED
+
+ # Swap motor direction if the hub is upside down
+ if invert_direction:
+ left_speed, right_speed = right_speed, left_speed # Swap the motor controls
+
+ # Run motors
+ left_motor.run(left_speed)
+ right_motor.run(right_speed)
+
+ # Update light color based on orientation
+ hub.light.on(Color.ORANGE if invert_direction else Color.BLUE)
+ remote.light.on(Color.ORANGE if invert_direction else Color.BLUE)
+
+ # Check for inactivity - Power off if left untouched to save batteries
+ # Reset the timer if there's any button pressed
+ if buttons_pressed:
+ inactivity_timer.reset()
+
+ if inactivity_timer.time() > 120000: # 2 minute in milliseconds
+ hub.system.shutdown()
+
+ # Small delay to prevent overloading the CPU
+ wait(10)