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Content import buttons import display import socket import wifi "TCP port to be bound to." PORT = 2342 "Map of hardware buttons to protocol numbers." BUTTONS = { buttons.BTN_UP: 0, buttons.BTN_RIGHT: 1, buttons.BTN_DOWN: 2, buttons.BTN_LEFT: 3, buttons.BTN_A: 4, buttons.BTN_B: 5, buttons.BTN_SELECT: 6, buttons.BTN_START: 7, } def encode_action(button, mode): """ Encodes an event to a byte to be sent over the network. The button is a button, to be mapped to a BUTTONS code from above. The boolean mode represents either a push (T) or a release (F). """ return int(mode) << 4 | BUTTONS[button] def create_server(): """ Establish a WiFi connection, opens a TCP socket, and returns a tuple of a server socket and its own "public" IPv4 address. """ wifi.connect() if not wifi.wait(): raise ValueError("cannot establish WiFi connection") ip, _, _, _ = wifi._STA_IF.ifconfig() server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_socket.bind(("", PORT)) server_socket.listen(1) return ip, server_socket def send_client(client_socket, button, push): "Send an encoded state to the client." client_socket.send(bytes([encode_action(button, push)])) def display_connection(ip): "Prints connection details on the display." display.drawFill(0x000000) display.drawText(5, 5, "{}:{}".format(ip, PORT), 0xFFFFFF) display.flush() ip, server_socket = create_server() display_connection(ip) while True: client_socket, _ = server_socket.accept() for button, code in BUTTONS.items(): buttons.detach(button) buttons.attach( button, lambda push, button=button: send_client(client_socket, button, push) )