tic tac toe with microbits

master.py

# Add your Python code here. E.g.
from microbit import *
import radio

nodes = ["00","01","02","10","11","12","20","21","22"]
board = [
    ["","",""],
    ["","",""],
    ["","",""]
    ]

def check_victory(board):
    combinations = [
        # vertical
        ((0,0), (1,0), (2,0)),
        ((0,1), (1,1), (2,1)),
        ((0,2), (1,2), (2,2)),
        # horizontal
        ((0,0), (0,1), (0,2)),
        ((1,0), (1,1), (1,2)),
        ((2,0), (2,1), (2,2)),
        # crossed
        ((0,0), (1,1), (2,2)),
        ((2,0), (1,1), (0,2))
    ]
    for coordinates in combinations:
        letters = [board[y][x] for x,y in coordinates]
        if len(set(letters)) == 1 and letters[0] != "":
            return letters[0] # returns corresponding letter for winner (X/O)
    return False

def clear_nodes(nodes):
    for node in nodes:
        radio.send(str(node))

radio.on()
clear_nodes(nodes)
    
while True:
    incoming = radio.receive()
    if incoming:
        x = int(str(incoming)[0])
        y = int(str(incoming)[1])
        marker = str(incoming)[2]
        board[x][y] = marker
        display.show(marker)
        win = check_victory(board)
        if win:
            display.scroll("Winner is:" + win)
            sleep(100)
            display.scroll("Winner is:" + win)
            clear_nodes(nodes)
            board = [["","",""],["","",""],["","",""]]
        radio.send("confirmed")
        sleep(100)
    else:
        display.show("*")
        
    if button_a.is_pressed():
        clear_nodes(nodes)
        board = [["","",""],["","",""],["","",""]]
    if button_b.is_pressed():
        clear_nodes(nodes)
        board = [["","",""],["","",""],["","",""]]
    sleep(100)
    

node.py

# Add your Python code here. E.g.
from microbit import *
import radio
radio.on()
# adjust these per node
coord_x = 0
coord_y = 0

chosen = ""

while True:
    incoming = radio.receive()
    if incoming == "confirmed":
        display.show("-")
        sleep(100)
    elif incoming == str(coord_x) + str(coord_y):
        chosen = ""
        display.clear()
    if button_a.is_pressed():
        chosen = "x"
        display.show(chosen)
        radio.send(str(coord_x) + str(coord_y) + chosen)
    elif button_b.is_pressed():
        chosen = "o"
        display.show(chosen)
        radio.send(str(coord_x) + str(coord_y) + chosen)
    display.show(chosen)