Convert DHT to use circuitpython library (#41525)

* Converts DHT to use circuitpython library

* Adds dht requirement to requirements_all

* Cleanup for isort,black and requirements

* Adds validation to prefix with D for PIN

* Sends name over to dhtclient

* Adds exceptions for broad-except

* Adds explict except for raised exception

* Removes unused var

* Moves setting dht var out of try

* Bump to 3.5.8

* Moves non-exception steps to else

* Bump library version

* Bumps version

homeassistant/components/dht/manifest.json

@@ -2,7 +2,7 @@
   "domain": "dht",
   "name": "DHT Sensor",
   "documentation": "https://www.home-assistant.io/integrations/dht",
-  "requirements": ["Adafruit-DHT==1.4.0"],
+  "requirements": ["adafruit-circuitpython-dht==3.6.0"],
   "codeowners": [],
   "iot_class": "local_polling"
 }

homeassistant/components/dht/sensor.py

@@ -3,7 +3,8 @@ from contextlib import suppress
 from datetime import timedelta
 import logging
 
-import Adafruit_DHT  # pylint: disable=import-error
+import adafruit_dht
+import board
 import voluptuous as vol
 
 from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
@@ -36,10 +37,20 @@ SENSOR_TYPES = {
     SENSOR_HUMIDITY: ["Humidity", PERCENTAGE],
 }
 
+
+def validate_pin_input(value):
+    """Validate that the GPIO PIN is prefixed with a D."""
+    try:
+        int(value)
+        return f"D{value}"
+    except ValueError:
+        return value.upper()
+
+
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {
         vol.Required(CONF_SENSOR): cv.string,
-        vol.Required(CONF_PIN): cv.string,
+        vol.Required(CONF_PIN): vol.All(cv.string, validate_pin_input),
         vol.Optional(CONF_MONITORED_CONDITIONS, default=[]): vol.All(
             cv.ensure_list, [vol.In(SENSOR_TYPES)]
         ),
@@ -58,22 +69,22 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
     """Set up the DHT sensor."""
     SENSOR_TYPES[SENSOR_TEMPERATURE][1] = hass.config.units.temperature_unit
     available_sensors = {
-        "AM2302": Adafruit_DHT.AM2302,
-        "DHT11": Adafruit_DHT.DHT11,
-        "DHT22": Adafruit_DHT.DHT22,
+        "AM2302": adafruit_dht.DHT22,
+        "DHT11": adafruit_dht.DHT11,
+        "DHT22": adafruit_dht.DHT22,
     }
     sensor = available_sensors.get(config[CONF_SENSOR])
     pin = config[CONF_PIN]
     temperature_offset = config[CONF_TEMPERATURE_OFFSET]
     humidity_offset = config[CONF_HUMIDITY_OFFSET]
+    name = config[CONF_NAME]
 
     if not sensor:
         _LOGGER.error("DHT sensor type is not supported")
         return False
 
-    data = DHTClient(Adafruit_DHT, sensor, pin)
+    data = DHTClient(sensor, pin, name)
     dev = []
-    name = config[CONF_NAME]
 
     with suppress(KeyError):
         for variable in config[CONF_MONITORED_CONDITIONS]:
@@ -157,18 +168,28 @@ class DHTSensor(SensorEntity):
 class DHTClient:
     """Get the latest data from the DHT sensor."""
 
-    def __init__(self, adafruit_dht, sensor, pin):
+    def __init__(self, sensor, pin, name):
         """Initialize the sensor."""
-        self.adafruit_dht = adafruit_dht
         self.sensor = sensor
-        self.pin = pin
+        self.pin = getattr(board, pin)
         self.data = {}
+        self.name = name
 
     @Throttle(MIN_TIME_BETWEEN_UPDATES)
     def update(self):
         """Get the latest data the DHT sensor."""
-        humidity, temperature = self.adafruit_dht.read_retry(self.sensor, self.pin)
-        if temperature:
-            self.data[SENSOR_TEMPERATURE] = temperature
-        if humidity:
-            self.data[SENSOR_HUMIDITY] = humidity
+        dht = self.sensor(self.pin)
+        try:
+            temperature = dht.temperature
+            humidity = dht.humidity
+        except RuntimeError:
+            _LOGGER.debug("Unexpected value from DHT sensor: %s", self.name)
+        except Exception:  # pylint: disable=broad-except
+            _LOGGER.exception("Error updating DHT sensor: %s", self.name)
+        else:
+            if temperature:
+                self.data[SENSOR_TEMPERATURE] = temperature
+            if humidity:
+                self.data[SENSOR_HUMIDITY] = humidity
+        finally:
+            dht.exit()

requirements_all.txt

@@ -4,9 +4,6 @@
 # homeassistant.components.aemet
 AEMET-OpenData==0.1.8
 
-# homeassistant.components.dht
-# Adafruit-DHT==1.4.0
-
 # homeassistant.components.sht31
 Adafruit-GPIO==1.0.3
 
@@ -101,6 +98,9 @@ accuweather==0.1.1
 # homeassistant.components.bmp280
 adafruit-circuitpython-bmp280==3.1.1
 
+# homeassistant.components.dht
+adafruit-circuitpython-dht==3.6.0
+
 # homeassistant.components.mcp23017
 adafruit-circuitpython-mcp230xx==2.2.2