hidagent/circuitpython/code.py at main · CMUBigLab/hidagent · GitHub

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importtime
importboard
importusb_hid
importbusio
importjson

fromadafruit_hid.keyboardimportKeyboard
fromadafruit_hid.keyboard_layout_usimportKeyboardLayoutUS
fromadafruit_hid.keycodeimportKeycode
fromadafruit_hid.mouseimportMouse

# UART connection to control computer (via USB-to-serial adapter)
uart=busio.UART(board.GP0, board.GP1, baudrate=9600)

buffer=bytearray()

defread_uart_line():
globalbuffer
whileTrue:
data=uart.read(32)
ifdata:
buffer.extend(data)
ifb'\n'inbuffer:
line, _, remainder=buffer.partition(b'\n')
buffer=bytearray(remainder)
returnline.decode("utf-8").strip()
time.sleep(0.01)

deftry_parse_json(line):
try:
returnjson.loads(line)
exceptExceptionase:
print("JSON parse error:", e)
returnNone

# Initialize HID devices
time.sleep(1)
keyboard=Keyboard(usb_hid.devices)
keyboard_layout=KeyboardLayoutUS(keyboard)
mouse=Mouse(usb_hid.devices)
time.sleep(1)

print("HIDAgent ready")

whileTrue:
line=read_uart_line()
print("Received:", line)

command_json=try_parse_json(line)
ifcommand_jsonisNone:
uart.write("Error\n".encode("utf-8"))
continue

type_param=command_json.get("type", "")
x_param=command_json.get("x", 0)
y_param=command_json.get("y", 0)
text_param=command_json.get("text", "")

defmove_in_chunks(dx, dy, chunk=10, delay=0.01):
# Move the mouse by (dx, dy) in small steps to avoid iOS
# pointer acceleration kicking in on large single moves.
rem_x, rem_y=dx, dy
whilerem_x!=0orrem_y!=0:
step_x=max(-chunk, min(chunk, rem_x))
step_y=max(-chunk, min(chunk, rem_y))
mouse.move(x=step_x, y=step_y)
rem_x-=step_x
rem_y-=step_y
time.sleep(delay)

iftype_param=="click":
mouse.move(x=-1000, y=-1000)
time.sleep(0.1)
move_in_chunks(x_param, y_param)
time.sleep(0.2)
mouse.click(Mouse.LEFT_BUTTON)

eliftype_param=="move":
mouse.move(x=-1000, y=-1000)
time.sleep(0.1)
move_in_chunks(x_param, y_param)

eliftype_param=="type":
keyboard_layout.write(text_param)

eliftype_param=="key":
# Handle key names like "enter", "tab", "space"
key_map= {
"enter": Keycode.ENTER,
"return": Keycode.ENTER,
"tab": Keycode.TAB,
"escape": Keycode.ESCAPE,
"space": Keycode.SPACEBAR,
"delete": Keycode.DELETE,
"backspace": Keycode.BACKSPACE,
"up": Keycode.UP_ARROW,
"down": Keycode.DOWN_ARROW,
"left": Keycode.LEFT_ARROW,
"right": Keycode.RIGHT_ARROW,
 }
key_code=key_map.get(text_param.lower(), None)
ifkey_code:
keyboard.press(key_code)
keyboard.release_all()

eliftype_param=="run":
keyboard.press(Keycode.LEFT_GUI, Keycode.SPACEBAR)
keyboard.release_all()
time.sleep(1)
keyboard_layout.write(text_param)
keyboard.press(Keycode.ENTER)
keyboard.release_all()

eliftype_param=="downarrow":
keyboard.press(Keycode.DOWN_ARROW)
keyboard.release_all()

eliftype_param=="dragdown"ortype_param=="dragup":
step=25iftype_param=="dragdown"else-25
mouse.move(x=-1000, y=-1000)
time.sleep(0.1)
move_in_chunks(x_param, y_param)
time.sleep(0.1)
mouse.press(Mouse.LEFT_BUTTON)
for_inrange(5):
time.sleep(0.05)
mouse.move(y=step)
mouse.release(Mouse.LEFT_BUTTON)

uart.write("Success\n".encode("utf-8"))