string pins

11 files changed, 136 insertions, 95 deletions

diff --git a/kvmd/apps/__init__.py b/kvmd/apps/__init__.py
index facf9c27..c808b6d4 100644
--- a/kvmd/apps/__init__.py
+++ b/kvmd/apps/__init__.py
@@ -30,7 +30,7 @@ import logging.config
 from typing import Tuple
 from typing import List
 from typing import Dict
-from typing import Set
+from typing import Type
 from typing import Optional
 
 import pygments
@@ -48,6 +48,7 @@ from ..plugins.atx import get_atx_class
 from ..plugins.msd import get_msd_class
 
 from ..plugins.ugpio import UserGpioModes
+from ..plugins.ugpio import BaseUserGpioDriver
 from ..plugins.ugpio import get_ugpio_driver_class
 
 from ..yamlconf import ConfigError
@@ -100,7 +101,6 @@ from ..validators.ugpio import valid_ugpio_mode
 from ..validators.ugpio import valid_ugpio_view_table
 
 from ..validators.hw import valid_tty_speed
-from ..validators.hw import valid_gpio_pin
 from ..validators.hw import valid_otg_gadget
 from ..validators.hw import valid_otg_id
 from ..validators.hw import valid_otg_ethernet
@@ -267,7 +267,7 @@ def _patch_dynamic(  # pylint: disable=too-many-locals
 
     if load_gpio:
         driver: str
-        drivers: Dict[str, Set[str]] = {}  # Name to modes
+        drivers: Dict[str, Type[BaseUserGpioDriver]] = {}  # Name to drivers
         for (driver, params) in {  # type: ignore
             "__gpio__": {},
             **tools.rget(raw_config, "kvmd", "gpio", "drivers"),
@@ -277,7 +277,7 @@ def _patch_dynamic(  # pylint: disable=too-many-locals
 
             driver_type = valid_stripped_string_not_empty(params.get("type", "gpio"))
             driver_class = get_ugpio_driver_class(driver_type)
-            drivers[driver] = driver_class.get_modes()
+            drivers[driver] = driver_class
             scheme["kvmd"]["gpio"]["drivers"][driver] = {
                 "type": Option(driver_type, type=valid_stripped_string_not_empty),
                 **driver_class.get_plugin_options()
@@ -294,12 +294,12 @@ def _patch_dynamic(  # pylint: disable=too-many-locals
 
             mode: str = params.get("mode", "")
             with manual_validated(mode, *path, channel, "mode"):
-                mode = valid_ugpio_mode(mode, drivers[driver])
+                mode = valid_ugpio_mode(mode, drivers[driver].get_modes())
 
             scheme["kvmd"]["gpio"]["scheme"][channel] = {
                 "driver":   Option("__gpio__", type=functools.partial(valid_ugpio_driver, variants=set(drivers))),
-                "pin":      Option(-1, type=valid_gpio_pin),
-                "mode":     Option("", type=functools.partial(valid_ugpio_mode, variants=drivers[driver])),
+                "pin":      Option(None, type=drivers[driver].get_pin_validator()),
+                "mode":     Option("", type=functools.partial(valid_ugpio_mode, variants=drivers[driver].get_modes())),
                 "inverted": Option(False, type=valid_bool),
                 **({
                     "busy_delay": Option(0.2, type=valid_float_f01),
diff --git a/kvmd/apps/kvmd/ugpio.py b/kvmd/apps/kvmd/ugpio.py
index ca04b31f..78d7f4f7 100644
--- a/kvmd/apps/kvmd/ugpio.py
+++ b/kvmd/apps/kvmd/ugpio.py
@@ -77,7 +77,7 @@ class _GpioInput:
     ) -> None:
 
         self.__channel = channel
-        self.__pin: int = config.pin
+        self.__pin: str = config.pin
         self.__inverted: bool = config.inverted
 
         self.__driver = driver
@@ -118,7 +118,7 @@ class _GpioOutput:  # pylint: disable=too-many-instance-attributes
     ) -> None:
 
         self.__channel = channel
-        self.__pin: int = config.pin
+        self.__pin: str = config.pin
         self.__inverted: bool = config.inverted
 
         self.__switch: bool = config.switch
diff --git a/kvmd/plugins/ugpio/__init__.py b/kvmd/plugins/ugpio/__init__.py
index eae65891..f63df5e4 100644
--- a/kvmd/plugins/ugpio/__init__.py
+++ b/kvmd/plugins/ugpio/__init__.py
@@ -22,6 +22,7 @@
 
 from typing import Set
 from typing import Type
+from typing import Callable
 from typing import Optional
 from typing import Any
 
@@ -51,7 +52,6 @@ class GpioDriverOfflineError(GpioOperationError):
 class UserGpioModes:
     INPUT = "input"
     OUTPUT = "output"
-
     ALL = set([INPUT, OUTPUT])
 
 
@@ -74,11 +74,15 @@ class BaseUserGpioDriver(BasePlugin):
     def get_modes(cls) -> Set[str]:
         return set(UserGpioModes.ALL)
 
-    def register_input(self, pin: int, debounce: float) -> None:
+    @classmethod
+    def get_pin_validator(cls) -> Callable[[Any], str]:
+        raise NotImplementedError
+
+    def register_input(self, pin: str, debounce: float) -> None:
         _ = pin
         _ = debounce
 
-    def register_output(self, pin: int, initial: Optional[bool]) -> None:
+    def register_output(self, pin: str, initial: Optional[bool]) -> None:
         _ = pin
         _ = initial
 
@@ -91,10 +95,10 @@ class BaseUserGpioDriver(BasePlugin):
     async def cleanup(self) -> None:
         pass
 
-    async def read(self, pin: int) -> bool:
+    async def read(self, pin: str) -> bool:
         raise NotImplementedError
 
-    async def write(self, pin: int, state: bool) -> None:
+    async def write(self, pin: str, state: bool) -> None:
         raise NotImplementedError
 
 
diff --git a/kvmd/plugins/ugpio/ezcoo.py b/kvmd/plugins/ugpio/ezcoo.py
index 81e199e8..a20aed32 100644
--- a/kvmd/plugins/ugpio/ezcoo.py
+++ b/kvmd/plugins/ugpio/ezcoo.py
@@ -28,7 +28,9 @@ import time
 
 from typing import Tuple
 from typing import Dict
+from typing import Callable
 from typing import Optional
+from typing import Any
 
 import serial
 
@@ -85,6 +87,10 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
             "protocol":     Option(1,      type=functools.partial(valid_number, min=1, max=2)),
         }
 
+    @classmethod
+    def get_pin_validator(cls) -> Callable[[Any], str]:
+        return (lambda arg: str(valid_number(arg, min=0, max=3, name="Ezcoo channel")))
+
     def prepare(self) -> None:
         assert self.__proc is None
         self.__proc = multiprocessing.Process(target=self.__serial_worker, daemon=True)
@@ -105,16 +111,16 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
             if self.__proc.is_alive() or self.__proc.exitcode is not None:
                 self.__proc.join()
 
-    async def read(self, pin: int) -> bool:
+    async def read(self, pin: str) -> bool:
         if not self.__is_online():
             raise GpioDriverOfflineError(self)
-        return (self.__channel == pin)
+        return (self.__channel == int(pin))
 
-    async def write(self, pin: int, state: bool) -> None:
+    async def write(self, pin: str, state: bool) -> None:
         if not self.__is_online():
             raise GpioDriverOfflineError(self)
-        if state and (0 <= pin <= 3):
-            self.__ctl_queue.put_nowait(pin)
+        if state:
+            self.__ctl_queue.put_nowait(int(pin))
 
     # =====
 
@@ -174,9 +180,12 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
         return (channel, data)
 
     def __send_channel(self, tty: serial.Serial, channel: int) -> None:
-        # Twice because of ezcoo bugs
-        cmd = (b"SET" if self.__protocol == 1 else b"EZS")
-        tty.write((b"%s OUT1 VS IN%d\n" % (cmd, channel + 1)) * 2)
+        assert 0 <= channel <= 3
+        cmd = b"%s OUT1 VS IN%d\n" % (
+            (b"SET" if self.__protocol == 1 else b"EZS"),
+            channel + 1,
+        )
+        tty.write(cmd * 2)  # Twice because of ezcoo bugs
         tty.flush()
 
     def __str__(self) -> str:
diff --git a/kvmd/plugins/ugpio/gpio.py b/kvmd/plugins/ugpio/gpio.py
index 28f0d5cb..315de6f1 100644
--- a/kvmd/plugins/ugpio/gpio.py
+++ b/kvmd/plugins/ugpio/gpio.py
@@ -21,7 +21,9 @@
 
 
 from typing import Dict
+from typing import Callable
 from typing import Optional
+from typing import Any
 
 import gpiod
 
@@ -31,6 +33,7 @@ from ... import aiogp
 from ...yamlconf import Option
 
 from ...validators.os import valid_abs_path
+from ...validators.hw import valid_gpio_pin
 
 from . import BaseUserGpioDriver
 
@@ -63,11 +66,15 @@ class Plugin(BaseUserGpioDriver):
             "device": Option("/dev/gpiochip0", type=valid_abs_path, unpack_as="device_path"),
         }
 
-    def register_input(self, pin: int, debounce: float) -> None:
-        self.__input_pins[pin] = aiogp.AioReaderPinParams(False, debounce)
+    @classmethod
+    def get_pin_validator(cls) -> Callable[[Any], str]:
+        return (lambda arg: str(valid_gpio_pin(arg)))
+
+    def register_input(self, pin: str, debounce: float) -> None:
+        self.__input_pins[int(pin)] = aiogp.AioReaderPinParams(False, debounce)
 
-    def register_output(self, pin: int, initial: Optional[bool]) -> None:
-        self.__output_pins[pin] = initial
+    def register_output(self, pin: str, initial: Optional[bool]) -> None:
+        self.__output_pins[int(pin)] = initial
 
     def prepare(self) -> None:
         assert self.__reader is None
@@ -95,14 +102,15 @@ class Plugin(BaseUserGpioDriver):
             except Exception:
                 pass
 
-    async def read(self, pin: int) -> bool:
+    async def read(self, pin: str) -> bool:
         assert self.__reader
-        if pin in self.__input_pins:
-            return self.__reader.get(pin)
-        return bool(self.__output_lines[pin].get_value())
+        pin_int = int(pin)
+        if pin_int in self.__input_pins:
+            return self.__reader.get(pin_int)
+        return bool(self.__output_lines[pin_int].get_value())
 
-    async def write(self, pin: int, state: bool) -> None:
-        self.__output_lines[pin].set_value(int(state))
+    async def write(self, pin: str, state: bool) -> None:
+        self.__output_lines[int(pin)].set_value(int(state))
 
     def __str__(self) -> str:
         return f"GPIO({self._instance_name})"
diff --git a/kvmd/plugins/ugpio/hidrelay.py b/kvmd/plugins/ugpio/hidrelay.py
index 7e18c72a..d4bdda48 100644
--- a/kvmd/plugins/ugpio/hidrelay.py
+++ b/kvmd/plugins/ugpio/hidrelay.py
@@ -25,7 +25,9 @@ import contextlib
 
 from typing import Dict
 from typing import Set
+from typing import Callable
 from typing import Optional
+from typing import Any
 
 import hid
 
@@ -36,6 +38,7 @@ from ... import aiotools
 
 from ...yamlconf import Option
 
+from ...validators.basic import valid_number
 from ...validators.basic import valid_float_f01
 from ...validators.os import valid_abs_path
 
@@ -79,11 +82,12 @@ class Plugin(BaseUserGpioDriver):
     def get_modes(cls) -> Set[str]:
         return set([UserGpioModes.OUTPUT])
 
-    def register_input(self, pin: int, debounce: float) -> None:
-        raise RuntimeError(f"Unsupported mode 'input' for pin={pin} on {self}")
+    @classmethod
+    def get_pin_validator(cls) -> Callable[[Any], str]:
+        return (lambda arg: str(valid_number(arg, min=0, max=7, name="HID relay channel")))
 
-    def register_output(self, pin: int, initial: Optional[bool]) -> None:
-        self.__initials[pin] = initial
+    def register_output(self, pin: str, initial: Optional[bool]) -> None:
+        self.__initials[int(pin)] = initial
 
     def prepare(self) -> None:
         logger = get_logger(0)
@@ -113,15 +117,15 @@ class Plugin(BaseUserGpioDriver):
         self.__close_device()
         self.__stop = True
 
-    async def read(self, pin: int) -> bool:
+    async def read(self, pin: str) -> bool:
         try:
-            return self.__inner_read(pin)
+            return self.__inner_read(int(pin))
         except Exception:
             raise GpioDriverOfflineError(self)
 
-    async def write(self, pin: int, state: bool) -> None:
+    async def write(self, pin: str, state: bool) -> None:
         try:
-            return self.__inner_write(pin, state)
+            return self.__inner_write(int(pin), state)
         except Exception:
             raise GpioDriverOfflineError(self)
 
@@ -140,27 +144,20 @@ class Plugin(BaseUserGpioDriver):
                                  pin, self, self.__device_path, tools.efmt(err))
 
     def __inner_read(self, pin: int) -> bool:
-        if self.__check_pin(pin):
-            return bool(self.__inner_read_raw() & (1 << pin))
-        return False
+        assert 0 <= pin <= 7
+        return bool(self.__inner_read_raw() & (1 << pin))
 
     def __inner_read_raw(self) -> int:
         with self.__ensure_device("reading") as device:
             return device.get_feature_report(1, 8)[7]
 
     def __inner_write(self, pin: int, state: bool) -> None:
-        if self.__check_pin(pin):
-            with self.__ensure_device("writing") as device:
-                report = [(0xFF if state else 0xFD), pin + 1]  # Pin numeration starts from 0
-                result = device.send_feature_report(report)
-                if result < 0:
-                    raise RuntimeError(f"Retval of send_feature_report() < 0: {result}")
-
-    def __check_pin(self, pin: int) -> bool:
-        ok = (0 <= pin <= 7)
-        if not ok:
-            get_logger(0).warning("Unsupported pin=%d for %s on %s", pin, self, self.__device_path)
-        return ok
+        assert 0 <= pin <= 7
+        with self.__ensure_device("writing") as device:
+            report = [(0xFF if state else 0xFD), pin + 1]  # Pin numeration starts from 0
+            result = device.send_feature_report(report)
+            if result < 0:
+                raise RuntimeError(f"Retval of send_feature_report() < 0: {result}")
 
     @contextlib.contextmanager
     def __ensure_device(self, context: str) -> hid.device:
diff --git a/kvmd/plugins/ugpio/ipmi.py b/kvmd/plugins/ugpio/ipmi.py
index 26ea9dbb..718c71cb 100644
--- a/kvmd/plugins/ugpio/ipmi.py
+++ b/kvmd/plugins/ugpio/ipmi.py
@@ -25,7 +25,9 @@ import functools
 
 from typing import List
 from typing import Dict
+from typing import Callable
 from typing import Optional
+from typing import Any
 
 from ...logging import get_logger
 
@@ -35,6 +37,7 @@ from ... import aioproc
 
 from ...yamlconf import Option
 
+from ...validators import check_string_in_list
 from ...validators.basic import valid_float_f01
 from ...validators.net import valid_ip_or_host
 from ...validators.net import valid_port
@@ -46,12 +49,12 @@ from . import BaseUserGpioDriver
 
 # =====
 _OUTPUTS = {
-    1: "on",
-    2: "off",
-    3: "cycle",
-    4: "reset",
-    5: "diag",
-    6: "soft",
+    "1": "on",
+    "2": "off",
+    "3": "cycle",
+    "4": "reset",
+    "5": "diag",
+    "6": "soft",
 }
 
 
@@ -108,14 +111,19 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
             "state_poll": Option(1.0, type=valid_float_f01),
         }
 
-    def register_input(self, pin: int, debounce: float) -> None:
+    @classmethod
+    def get_pin_validator(cls) -> Callable[[Any], str]:
+        actions = ["0", *_OUTPUTS, "status", *_OUTPUTS.values()]
+        return (lambda arg: check_string_in_list(arg, "IPMI action", actions))
+
+    def register_input(self, pin: str, debounce: float) -> None:
         _ = debounce
-        if pin != 0:
+        if pin not in ["0", "status"]:
             raise RuntimeError(f"Unsupported mode 'input' for pin={pin} on {self}")
 
-    def register_output(self, pin: int, initial: Optional[bool]) -> None:
+    def register_output(self, pin: str, initial: Optional[bool]) -> None:
         _ = initial
-        if pin not in _OUTPUTS:
+        if pin not in [*_OUTPUTS, *_OUTPUTS.values()]:
             raise RuntimeError(f"Unsupported mode 'output' for pin={pin} on {self}")
 
     def prepare(self) -> None:
@@ -131,17 +139,17 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                 prev = new
             await asyncio.sleep(self.__state_poll)
 
-    async def read(self, pin: int) -> bool:
+    async def read(self, pin: str) -> bool:
         if not self.__online:
             raise GpioDriverOfflineError(self)
-        if pin == 0:
+        if pin == "0":
             return self.__power
         return False
 
-    async def write(self, pin: int, state: bool) -> None:
+    async def write(self, pin: str, state: bool) -> None:
         if not self.__online:
             raise GpioDriverOfflineError(self)
-        action = _OUTPUTS[pin]
+        action = (_OUTPUTS[pin] if pin.isdigit() else pin)
         try:
             proc = await aioproc.log_process(**self.__make_ipmitool_kwargs(action), logger=get_logger(0))
             if proc.returncode != 0:
diff --git a/kvmd/plugins/ugpio/otgbind.py b/kvmd/plugins/ugpio/otgbind.py
index 6dec46c9..600c8488 100644
--- a/kvmd/plugins/ugpio/otgbind.py
+++ b/kvmd/plugins/ugpio/otgbind.py
@@ -23,6 +23,9 @@
 import os
 import asyncio
 
+from typing import Callable
+from typing import Any
+
 from ...logging import get_logger
 
 from ...inotify import InotifyMask
@@ -50,6 +53,10 @@ class Plugin(BaseUserGpioDriver):
         self.__udc = udc
         self.__driver = ""
 
+    @classmethod
+    def get_pin_validator(cls) -> Callable[[Any], str]:
+        return str
+
     def prepare(self) -> None:
         (self.__udc, self.__driver) = usb.find_udc(self.__udc)
         get_logger().info("Using UDC %s", self.__udc)
@@ -83,11 +90,11 @@ class Plugin(BaseUserGpioDriver):
             except Exception:
                 logger.exception("Unexpected OTG-bind watcher error")
 
-    async def read(self, pin: int) -> bool:
+    async def read(self, pin: str) -> bool:
         _ = pin
         return os.path.islink(self.__get_driver_path(self.__udc))
 
-    async def write(self, pin: int, state: bool) -> None:
+    async def write(self, pin: str, state: bool) -> None:
         _ = pin
         with open(self.__get_driver_path("bind" if state else "unbind"), "w") as ctl_file:
             ctl_file.write(f"{self.__udc}\n")
diff --git a/kvmd/plugins/ugpio/pwm.py b/kvmd/plugins/ugpio/pwm.py
index 582bbb50..2bd8807e 100644
--- a/kvmd/plugins/ugpio/pwm.py
+++ b/kvmd/plugins/ugpio/pwm.py
@@ -22,8 +22,10 @@
 
 
 from typing import Dict
-from typing import Optional
 from typing import Set
+from typing import Callable
+from typing import Optional
+from typing import Any
 
 from periphery import PWM
 
@@ -35,6 +37,7 @@ from ... import aiotools
 from ...yamlconf import Option
 
 from ...validators.basic import valid_int_f0
+from ...validators.hw import valid_gpio_pin
 
 from . import GpioDriverOfflineError
 from . import UserGpioModes
@@ -77,11 +80,12 @@ class Plugin(BaseUserGpioDriver):
     def get_modes(cls) -> Set[str]:
         return set([UserGpioModes.OUTPUT])
 
-    def register_input(self, pin: int, debounce: float) -> None:
-        raise RuntimeError(f"Unsupported mode 'input' for pin={pin} on {self}")
+    @classmethod
+    def get_pin_validator(cls) -> Callable[[Any], str]:
+        return (lambda arg: str(valid_gpio_pin(arg)))
 
-    def register_output(self, pin: int, initial: Optional[bool]) -> None:
-        self.__channels[pin] = initial
+    def register_output(self, pin: str, initial: Optional[bool]) -> None:
+        self.__channels[int(pin)] = initial
 
     def prepare(self) -> None:
         logger = get_logger(0)
@@ -106,15 +110,15 @@ class Plugin(BaseUserGpioDriver):
                 get_logger(0).error("Can't cleanup PWM chip %d channel %d: %s",
                                     self.__chip, pin, tools.efmt(err))
 
-    async def read(self, pin: int) -> bool:
+    async def read(self, pin: str) -> bool:
         try:
-            return (self.__pwms[pin].duty_cycle_ns == self.__duty_cycle_push)
+            return (self.__pwms[int(pin)].duty_cycle_ns == self.__duty_cycle_push)
         except Exception:
             raise GpioDriverOfflineError(self)
 
-    async def write(self, pin: int, state: bool) -> None:
+    async def write(self, pin: str, state: bool) -> None:
         try:
-            self.__pwms[pin].duty_cycle_ns = self.__get_duty_cycle(state)
+            self.__pwms[int(pin)].duty_cycle_ns = self.__get_duty_cycle(state)
         except Exception:
             raise GpioDriverOfflineError(self)
 
diff --git a/kvmd/plugins/ugpio/tesmart.py b/kvmd/plugins/ugpio/tesmart.py
index 7fbd37db..27cf0038 100644
--- a/kvmd/plugins/ugpio/tesmart.py
+++ b/kvmd/plugins/ugpio/tesmart.py
@@ -24,7 +24,9 @@ import asyncio
 
 from typing import Tuple
 from typing import Dict
+from typing import Callable
 from typing import Optional
+from typing import Any
 
 from ...logging import get_logger
 
@@ -33,6 +35,7 @@ from ... import aiotools
 
 from ...yamlconf import Option
 
+from ...validators.basic import valid_number
 from ...validators.basic import valid_float_f0
 from ...validators.basic import valid_float_f01
 from ...validators.net import valid_ip_or_host
@@ -79,15 +82,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
             "state_poll":   Option(10.0, type=valid_float_f01),
         }
 
-    def register_input(self, pin: int, debounce: float) -> None:
-        if not (0 <= pin < 16):
-            raise RuntimeError(f"Unsupported port number: {pin}")
-        _ = debounce
-
-    def register_output(self, pin: int, initial: Optional[bool]) -> None:
-        if not (0 <= pin < 16):
-            raise RuntimeError(f"Unsupported port number: {pin}")
-        _ = initial
+    @classmethod
+    def get_pin_validator(cls) -> Callable[[Any], str]:
+        return (lambda arg: str(valid_number(arg, min=0, max=15, name="Tesmart channel")))
 
     async def run(self) -> None:
         prev_active = -2
@@ -104,12 +101,13 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
     async def cleanup(self) -> None:
         await self.__close_device()
 
-    async def read(self, pin: int) -> bool:
-        return (self.__active == pin)
+    async def read(self, pin: str) -> bool:
+        return (self.__active == int(pin))
 
-    async def write(self, pin: int, state: bool) -> None:
+    async def write(self, pin: str, state: bool) -> None:
+        assert 0 <= pin <= 15
         if state:
-            await self.__send_command("{:c}{:c}".format(1, pin + 1).encode())
+            await self.__send_command("{:c}{:c}".format(1, int(pin) + 1).encode())
             await self.__update_notifier.notify()
             await asyncio.sleep(self.__switch_delay)  # Slowdown
 
diff --git a/kvmd/plugins/ugpio/wol.py b/kvmd/plugins/ugpio/wol.py
index 842ebd47..1305b3e6 100644
--- a/kvmd/plugins/ugpio/wol.py
+++ b/kvmd/plugins/ugpio/wol.py
@@ -24,7 +24,9 @@ import socket
 import functools
 
 from typing import Dict
+from typing import Callable
 from typing import Optional
+from typing import Any
 
 from ...logging import get_logger
 
@@ -66,11 +68,15 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
             "mac":  Option("", type=valid_mac, if_empty=""),
         }
 
-    async def read(self, pin: int) -> bool:
+    @classmethod
+    def get_pin_validator(cls) -> Callable[[Any], str]:
+        return str
+
+    async def read(self, pin: str) -> bool:
         _ = pin
         return False
 
-    async def write(self, pin: int, state: bool) -> None:
+    async def write(self, pin: str, state: bool) -> None:
         _ = pin
         if not state:
             return