Create __init__.py

custom_components/__init__.py

@@ -0,0 +1,13 @@
+from .const import DOMAIN
+
+async def async_setup(hass, config):
+    return True
+
+async def async_setup_entry(hass, entry):
+    hass.async_create_task(
+        hass.config_entries.async_forward_entry_setup(entry, "sensor")
+    )
+    return True
+
+async def async_unload_entry(hass, entry):
+    return await hass.config_entries.async_forward_entry_unload(entry, "sensor")