From c7fbbbe9359d2ce621c440bda4b353db1ae920b3 Mon Sep 17 00:00:00 2001
From: springstan <46536646+springstan@users.noreply.github.com>
Date: Sat, 31 Oct 2020 16:19:17 +0100
Subject: [PATCH] Allow saving zero precision option in Opentherm_gw (#42593)

* Allow saving zero precision option in Opentherm_gw

* Add default 0 back for precision option

* Adjust config flow test for zero precision
---
 homeassistant/components/opentherm_gw/climate.py     | 5 ++---
 homeassistant/components/opentherm_gw/config_flow.py | 2 --
 tests/components/opentherm_gw/test_config_flow.py    | 2 +-
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/homeassistant/components/opentherm_gw/climate.py b/homeassistant/components/opentherm_gw/climate.py
index 64625541352..237733e6870 100644
--- a/homeassistant/components/opentherm_gw/climate.py
+++ b/homeassistant/components/opentherm_gw/climate.py
@@ -33,7 +33,6 @@ from .const import CONF_FLOOR_TEMP, CONF_PRECISION, DATA_GATEWAYS, DATA_OPENTHER
 _LOGGER = logging.getLogger(__name__)
 
 DEFAULT_FLOOR_TEMP = False
-DEFAULT_PRECISION = None
 
 SUPPORT_FLAGS = SUPPORT_TARGET_TEMPERATURE | SUPPORT_PRESET_MODE
 
@@ -62,7 +61,7 @@ class OpenThermClimate(ClimateEntity):
         )
         self.friendly_name = gw_dev.name
         self.floor_temp = options.get(CONF_FLOOR_TEMP, DEFAULT_FLOOR_TEMP)
-        self.temp_precision = options.get(CONF_PRECISION, DEFAULT_PRECISION)
+        self.temp_precision = options.get(CONF_PRECISION)
         self._available = False
         self._current_operation = None
         self._current_temperature = None
@@ -177,7 +176,7 @@ class OpenThermClimate(ClimateEntity):
     @property
     def precision(self):
         """Return the precision of the system."""
-        if self.temp_precision is not None:
+        if self.temp_precision is not None and self.temp_precision != 0:
             return self.temp_precision
         if self.hass.config.units.temperature_unit == TEMP_CELSIUS:
             return PRECISION_HALVES
diff --git a/homeassistant/components/opentherm_gw/config_flow.py b/homeassistant/components/opentherm_gw/config_flow.py
index 60d367db5a1..59f14ab2ee5 100644
--- a/homeassistant/components/opentherm_gw/config_flow.py
+++ b/homeassistant/components/opentherm_gw/config_flow.py
@@ -114,8 +114,6 @@ class OpenThermGwOptionsFlow(config_entries.OptionsFlow):
     async def async_step_init(self, user_input=None):
         """Manage the opentherm_gw options."""
         if user_input is not None:
-            if user_input.get(CONF_PRECISION) == 0:
-                user_input[CONF_PRECISION] = None
             return self.async_create_entry(title="", data=user_input)
 
         return self.async_show_form(
diff --git a/tests/components/opentherm_gw/test_config_flow.py b/tests/components/opentherm_gw/test_config_flow.py
index 2f4c171cf36..a7be6ddcf6b 100644
--- a/tests/components/opentherm_gw/test_config_flow.py
+++ b/tests/components/opentherm_gw/test_config_flow.py
@@ -206,5 +206,5 @@ async def test_options_form(hass):
     )
 
     assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
-    assert result["data"][CONF_PRECISION] is None
+    assert result["data"][CONF_PRECISION] == 0.0
     assert result["data"][CONF_FLOOR_TEMP] is True