Use Python with HaloCode
HaloCode is a MicroPython-based single board computer. Python code need to be uploaded to HaloCode to run.
Start Using Python
Switch the programming mode from "Blocks" to "Python" to start using Python.
Note: please make sure that "HaloCode" is currently selected.
Here's an example code:
import halo
import event
def on_start():
halo.led.show_all(122, 239, 10)
After programming, click "Upload" to upload the program to HaloCode.
Convert Blocks to Python Code
In the Scripts area, click
to covert blocks to Python. The following is an example:
Use HaloCode's LEDs
LED Ring
The ID and position of each of the 12 LEDs are as follows:
led.show_all(r, g, b)
Set the color of all the LEDs, mixed by red, green, and blue, each color with a value range 0-255.
halo.led.show_all(255, 0, 0) # Set all the LEDs to color red
Turn off all the LEDs.
halo.led.off_all() # Turn off all the LEDs
Set the color of all 12 LEDs at the same time. There are ten colors: red, green, blue, yellow, cyan, purple, white, orange, black, and gray.
halo.led.show_ring('red orange yellow green cyan blue purple white white white white white') # Set the 12 LEDs to color red, orange, yellow, green, cyan, blue, purple, white, white, white, white, and white respectively
led.show_single(led_id, r, g, b)
Set the color of one specified LED.
halo.led.show_single(1, 255, 0, 0) # Set the color of the first LED to red
Turn off one specified LED.
halo.led.off_single(4) # Turn off the fourth LED
Show the default LED animation. There are four options: spoondrift, meteor, rainbow, and firefly.
halo.led.show_animation('rainbow') # Show the "rainbow" LED animation
Use the status of the LED ring to display percentage.
halo.led.ring_graph(60) # Use the LED ring to display 60%
Use the Sensors of HaloCode
If the button is pressed, return True; otherwise, return False.
print(halo.button.is_pressed()) # Print True if the button is pressed
Get the loudness of the microphone. The range is 0-100.
print(halo.microphone.get_loudness()) # Output the loudness
Tell whether HaloCode is being shaken. The result is True or False.
print(halo.motion_sensor.is_shaked()) # If HaloCode is being shaken, return True
Tell whether HaloCode is tilted to the right or left. The result is True or False.
print(halo.motion_sensor.is_tilted_left()) # If HaloCode is left-tilted, return True
Tell whether HaloCode is placed arrow-up or arrow-down. The result is True or False.
print(halo.motion_sensor.is_arrow_up()) # If HaloCode is placed arrow-up, return True
Get the roll, pitch or yaw value of HaloCode's gyroscope
  • motion_sensor.get_roll()
  • motion_sensor.get_pitch()
  • motion_sensor.get_yaw()
Get the gyroscope's rotation value (in degrees) around a certain axis.
  • motion_sensor.get_rotation(axis): x, y, or z axis
  • motion_sensor.reset_rotation(axis="all"): reset the rotation angles of the gyro
You can use motion_sensor.get_shake_strength() to get the intensity of the shaking.
print("The yaw and pitch is:", halo.motion_sensor.get_yaw(), halo.motion_sensor.get_pitch()) # output the yaw and pitch value of the gyro
print("The rotation value is:", halo.motion_sensor.get_rotation(x), halo.motion_sensor.get_rotation(y), halo.motion_sensor.get_rotation(z))
halo.motion_sensor.reset_roation() # reset the rotation value.
print("Shake strength:", halo.motion_sensor.get_shake_strength())
Get the timer value in seconds (since startup or last reset).
print(halo.get_timer()) # print the timer value since startup or last reset
Reset the timer.
print(halo.get_timer()) # prints 0
HaloCode's Event and Flow Control
HaloCode supports events (like when the button is pressed), and it also supports multi-threading.
If you wish to use event, declare a function and register it to the event. A program can only register no more than 6 event functions.
def on_button_pressed(): # define a function
print("The button is pressed!")
halo.on_button_pressed() # register it to "when button is pressed" event
When the button is pressed, run the function.
def on_button_pressed():
print("The button is pressed!")
When HaloCode is being shaken, call the function.
def on_shaked():
print("I'm shaken!")
Call the function when HaloCode is tilted to the left.
def on_tilted_left():
print("I'm left-tilted!")
on_greater_than(volume, 'microphone')
When the loudness is over a certain value, call the function.
def on_greater_than():
print("The loudness is over 50! Too loud!")
halo.on_greater_than(50, 'microphone')
When the specified message is received, call the function.
def on_received():
print("Game start!")
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