Emoji Messenger

emoji_messenger.py

# A micro:bit Emoji messenger.
# By Piers & Ethan. Released to the public domain.
import radio
from microbit import display, Image, button_a, button_b

image_list = [
    Image.HAPPY,
    Image.SAD,
    Image.CONFUSED,
    Image.ASLEEP,
    Image.SURPRISED,
    Image.SILLY,
    Image.FABULOUS,
    Image.MEH,
    Image.YES,
    Image.NO,
    Image.COW,
    Image.GHOST,
    Image.UMBRELLA
]

# Count the number of images in the list
image_list_len = len(image_list) -1

# Create a global list position value
pos = 0

# The radio won't work unless it's switched on.
radio.on()

# Event loop.
while True:
    
    if button_b.was_pressed():
       # If button b is pressed, show the image from the list
       # and set the pos value with the next position
       display.show(image_list[pos])
       if pos == image_list_len: # If we are at the end of the list show the first image :)
           pos = 0
       else:
           pos += 1
    
    # Button A sends the list position of the image.
    if button_a.was_pressed():
        radio.send(str(pos-1))  # Send a string value of the list position
        
    # Read any incoming messages.
    # We could add some error handling here :)
    incoming = radio.receive()
    if incoming:
        # If there is a message show the image that matches the list possition
        # We need to convert the string back to an INT (Number)
        display.show(image_list[int(incoming)])