Add mmol support to nightscout

homeassistant/components/nightscout/config_flow.py

@@ -16,7 +16,7 @@
 
 _LOGGER = logging.getLogger(__name__)
 
-DATA_SCHEMA = vol.Schema({vol.Required(CONF_URL): str, vol.Optional(CONF_API_KEY): str})
+DATA_SCHEMA = vol.Schema({vol.Required(CONF_URL): str, vol.Optional(CONF_API_KEY): str, vol.Required('Units'): vol.In(["mmol/l", "mg/dl"])})
 
 
 async def _validate_input(data: dict[str, Any]) -> dict[str, str]:

homeassistant/components/nightscout/sensor.py

@@ -31,18 +31,18 @@ async def async_setup_entry(
 ) -> None:
     """Set up the Glucose Sensor."""
     api = hass.data[DOMAIN][entry.entry_id]
-    async_add_entities([NightscoutSensor(api, "Blood Sugar", entry.unique_id)], True)
-
+    units = entry.data.get("Units")
+    async_add_entities([NightscoutSensor(api, "Blood Sugar", entry.unique_id, units)], True)
 
 class NightscoutSensor(SensorEntity):
     """Implementation of a Nightscout sensor."""
 
-    _attr_native_unit_of_measurement = "mg/dL"
     _attr_icon = "mdi:cloud-question"
 
-    def __init__(self, api: NightscoutAPI, name: str, unique_id: str | None) -> None:
+    def __init__(self, api: NightscoutAPI, name: str, unique_id: str, units: str | None) -> None:
         """Initialize the Nightscout sensor."""
         self.api = api
+        self._attr_native_unit_of_measurement = units
         self._attr_unique_id = unique_id
         self._attr_name = name
         self._attr_extra_state_attributes: dict[str, Any] = {}
@@ -67,7 +67,11 @@ async def async_update(self) -> None:
                 ATTR_DELTA: value.delta,
                 ATTR_DIRECTION: value.direction,
             }
-            self._attr_native_value = value.sgv
+            """Convert to mmol/l and keep 2 decimals"""
+            if self._attr_native_unit_of_measurement == 'mmol/l':
+                self._attr_native_value = '{:.2f}'.format(value.sgv * 0.0555)
+            else:
+                self._attr_native_value = value.sgv
             self._attr_icon = self._parse_icon(value.direction)
         else:
             self._attr_available = False

homeassistant/components/nightscout/strings.json

@@ -3,10 +3,11 @@
     "step": {
       "user": {
         "title": "Enter your Nightscout server information.",
-        "description": "- URL: the address of your nightscout instance. I.e.: https://myhomeassistant.duckdns.org:5423\n- API Key (optional): Only use if your instance is protected (auth_default_roles != readable).",
+        "description": "- URL: the address of your nightscout instance. I.e.: https://myhomeassistant.duckdns.org:5423\n- API Key (optional): Only use if your instance is protected (auth_default_roles != readable).\n- Units: Select the unit type to display.",
         "data": {
           "url": "[%key:common::config_flow::data::url%]",
-          "api_key": "[%key:common::config_flow::data::api_key%]"
+          "api_key": "[%key:common::config_flow::data::api_key%]",
+          "unit_type": "[%key:common::config_flow::data::units%]"
         }
       }
     },