From 0c0b48b5da2dcfa6d98d27050c623cd6aa860c5e Mon Sep 17 00:00:00 2001
From: Joe Mou <dev@mou.fo>
Date: Mon, 6 Jul 2026 03:31:01 -0400
Subject: HA: Check for rain

---
 hostnix/elmo/home-assistant.nix | 46 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

(limited to 'hostnix/elmo')

diff --git a/hostnix/elmo/home-assistant.nix b/hostnix/elmo/home-assistant.nix
index d17c41b..5648a0f 100644
--- a/hostnix/elmo/home-assistant.nix
+++ b/hostnix/elmo/home-assistant.nix
@@ -80,6 +80,7 @@ in
         use_x_forwarded_for = true;
       };
       recorder.db_url = "postgresql://@/hass";
+
       auth_oidc = {
         client_id = "9332ad56-1917-4f12-a0ef-f6ff69994cf4";
         discovery_url = "https://pi.mou.fo/.well-known/openid-configuration";
@@ -102,6 +103,13 @@ in
         brightness_mode_time_light = 3 * 60 * 60;
       };
 
+      input_boolean = {
+        rain_today = {
+          name = "Rain today";
+          icon = "mdi:weather-rainy";
+        };
+      };
+
       template = [
         {
           switch = [
@@ -369,6 +377,44 @@ in
           ];
         }
 
+        {
+          id = "check_rain_forecast";
+          alias = "Check rain forecast";
+          trigger = [ (ha.trigger.at "05:00") ];
+          action = [
+            {
+              action = "weather.get_forecasts";
+              target.entity_id = "weather.forecast_home";
+              data.type = "daily";
+              response_variable = "forecast";
+            }
+            {
+              "if" = [
+                {
+                  condition = "template";
+                  value_template = "{{ forecast['weather.forecast_home'].forecast[0].precipitation > 0 }}";
+                }
+              ];
+              "then" = [
+                {
+                  action = "input_boolean.turn_on";
+                  target.entity_id = "input_boolean.rain_today";
+                }
+                {
+                  action = "notify.notify";
+                  data.message = "Rain expected today ({{ forecast['weather.forecast_home'].forecast[0].precipitation }} inches)";
+                }
+              ];
+              "else" = [
+                {
+                  action = "input_boolean.turn_off";
+                  target.entity_id = "input_boolean.rain_today";
+                }
+              ];
+            }
+          ];
+        }
+
         # The panel light can become unresponsive and need to be reboot.
         {
           id = "panel_light_reinitialize";
-- 
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