77 lines
2.3 KiB
Python
77 lines
2.3 KiB
Python
"""Config flow for Modbus RTU Monitor integration."""
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from __future__ import annotations
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import asyncio
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import logging
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from typing import Any
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import voluptuous as vol
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from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
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from homeassistant.const import CONF_HOST, CONF_PORT
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import homeassistant.helpers.config_validation as cv
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from .const import DEFAULT_PORT, DOMAIN
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_LOGGER = logging.getLogger(__name__)
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class ModbusRTUMonitorConfigFlow(ConfigFlow, domain=DOMAIN):
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"""Handle a config flow for Modbus RTU Monitor."""
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VERSION = 1
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MINOR_VERSION = 1
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async def async_step_user(
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self, user_input: dict[str, Any] | None = None
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) -> ConfigFlowResult:
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"""Handle the initial step."""
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errors: dict[str, str] = {}
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if user_input is not None:
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# Validate connection by attempting to connect
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try:
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await self._test_connection(
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user_input[CONF_HOST],
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user_input[CONF_PORT],
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)
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except asyncio.TimeoutError:
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errors["base"] = "cannot_connect"
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except Exception:
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_LOGGER.exception("Unexpected exception during connection test")
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errors["base"] = "unknown"
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else:
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# Prevent duplicate entries for same host:port
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self._async_abort_entries_match(
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{
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CONF_HOST: user_input[CONF_HOST],
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CONF_PORT: user_input[CONF_PORT],
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}
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)
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title = f"Modbus RTU Monitor ({user_input[CONF_HOST]}:{user_input[CONF_PORT]})"
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return self.async_create_entry(title=title, data=user_input)
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data_schema = vol.Schema(
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{
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vol.Required(CONF_HOST): str,
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vol.Required(CONF_PORT, default=DEFAULT_PORT): cv.port,
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}
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)
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return self.async_show_form(
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step_id="user",
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data_schema=data_schema,
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errors=errors,
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)
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async def _test_connection(self, host: str, port: int) -> None:
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"""Test TCP connection to Modbus gateway."""
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reader, writer = await asyncio.wait_for(
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asyncio.open_connection(host, port),
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timeout=5.0,
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)
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writer.close()
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await writer.wait_closed()
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