diff --git a/nixos/tako/services/homeassistant.json b/nixos/tako/services/homeassistant.json
new file mode 100644
--- /dev/null
+++ b/nixos/tako/services/homeassistant.json
@@ -0,0 +1,153 @@
+{
+  "annotations": {"list": []},
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 0,
+  "id": null,
+  "links": [],
+  "liveNow": false,
+  "panels": [
+    {
+      "type": "timeseries",
+      "title": "Plug power",
+      "gridPos": {"h": 8, "w": 12, "x": 0, "y": 0},
+      "id": 1,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "watt", "custom": {"drawStyle": "line", "lineInterpolation": "smooth", "fillOpacity": 10, "showPoints": "never"}}, "overrides": []},
+      "options": {"legend": {"displayMode": "table", "placement": "right", "calcs": ["lastNotNull", "max"]}, "tooltip": {"mode": "multi"}},
+      "targets": [
+        {"expr": "hass_sensor_power_w{job=\"tsuba-homeassistant\"}", "legendFormat": "{{friendly_name}}", "refId": "A"}
+      ]
+    },
+    {
+      "type": "timeseries",
+      "title": "Plug current",
+      "gridPos": {"h": 8, "w": 12, "x": 12, "y": 0},
+      "id": 2,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "amp", "custom": {"drawStyle": "line", "lineInterpolation": "smooth", "fillOpacity": 10, "showPoints": "never"}}, "overrides": []},
+      "options": {"legend": {"displayMode": "table", "placement": "right", "calcs": ["lastNotNull", "max"]}, "tooltip": {"mode": "multi"}},
+      "targets": [
+        {"expr": "hass_sensor_current_a{job=\"tsuba-homeassistant\"}", "legendFormat": "{{friendly_name}}", "refId": "A"}
+      ]
+    },
+    {
+      "type": "timeseries",
+      "title": "Temperatures",
+      "gridPos": {"h": 8, "w": 12, "x": 0, "y": 16},
+      "id": 3,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "celsius", "custom": {"drawStyle": "line", "lineInterpolation": "smooth", "fillOpacity": 10, "showPoints": "never"}}, "overrides": []},
+      "options": {"legend": {"displayMode": "table", "placement": "right", "calcs": ["lastNotNull", "max"]}, "tooltip": {"mode": "multi"}},
+      "targets": [
+        {"expr": "hass_sensor_temperature_celsius{job=\"tsuba-homeassistant\"}", "legendFormat": "{{friendly_name}}", "refId": "A"}
+      ]
+    },
+    {
+      "type": "stat",
+      "title": "Battery levels",
+      "gridPos": {"h": 8, "w": 12, "x": 12, "y": 16},
+      "id": 4,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "percent", "min": 0, "max": 100, "color": {"mode": "thresholds"}, "thresholds": {"mode": "absolute", "steps": [{"color": "red"}, {"color": "yellow", "value": 25}, {"color": "green", "value": 50}]}}, "overrides": []},
+      "options": {"colorMode": "value", "graphMode": "area", "justifyMode": "center", "orientation": "horizontal", "reduceOptions": {"calcs": ["lastNotNull"], "fields": "", "values": false}, "textMode": "auto"},
+      "targets": [
+        {"expr": "hass_sensor_battery_percent{job=\"tsuba-homeassistant\"}", "legendFormat": "{{friendly_name}}", "instant": true, "refId": "A"}
+      ]
+    },
+    {
+      "type": "stat",
+      "title": "Energy today",
+      "gridPos": {"h": 8, "w": 12, "x": 0, "y": 8},
+      "id": 5,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "kwatth", "min": 0, "color": {"mode": "thresholds"}, "thresholds": {"mode": "absolute", "steps": [{"color": "green"}, {"color": "yellow", "value": 2}, {"color": "red", "value": 10}]}}, "overrides": []},
+      "options": {"colorMode": "value", "graphMode": "area", "justifyMode": "center", "orientation": "horizontal", "reduceOptions": {"calcs": ["lastNotNull"], "fields": "", "values": false}, "textMode": "auto"},
+      "targets": [
+        {"expr": "hass_sensor_energy_kwh{job=\"tsuba-homeassistant\", friendly_name=~\".*Today.*\"}", "legendFormat": "{{friendly_name}}", "instant": true, "refId": "A"}
+      ]
+    },
+    {
+      "type": "stat",
+      "title": "Energy this month",
+      "gridPos": {"h": 8, "w": 12, "x": 12, "y": 8},
+      "id": 6,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "kwatth", "min": 0, "color": {"mode": "thresholds"}, "thresholds": {"mode": "absolute", "steps": [{"color": "green"}, {"color": "yellow", "value": 50}, {"color": "red", "value": 300}]}}, "overrides": []},
+      "options": {"colorMode": "value", "graphMode": "area", "justifyMode": "center", "orientation": "horizontal", "reduceOptions": {"calcs": ["lastNotNull"], "fields": "", "values": false}, "textMode": "auto"},
+      "targets": [
+        {"expr": "hass_sensor_energy_kwh{job=\"tsuba-homeassistant\", friendly_name=~\".*month.*\"}", "legendFormat": "{{friendly_name}}", "instant": true, "refId": "A"}
+      ]
+    },
+    {
+      "type": "timeseries",
+      "title": "Plug voltage",
+      "gridPos": {"h": 8, "w": 12, "x": 0, "y": 24},
+      "id": 7,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "volt", "custom": {"drawStyle": "line", "lineInterpolation": "smooth", "fillOpacity": 10, "showPoints": "never"}}, "overrides": []},
+      "options": {"legend": {"displayMode": "table", "placement": "right", "calcs": ["lastNotNull", "min", "max"]}, "tooltip": {"mode": "multi"}},
+      "targets": [
+        {"expr": "hass_sensor_voltage_v{job=\"tsuba-homeassistant\", entity=~\"sensor\\\\.(bedside_port|tapo_p110|ac|bambu_lab)_voltage\"}", "legendFormat": "{{friendly_name}}", "refId": "A"}
+      ]
+    },
+    {
+      "type": "stat",
+      "title": "Light brightness",
+      "gridPos": {"h": 8, "w": 12, "x": 12, "y": 24},
+      "id": 8,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "percent", "min": 0, "max": 100, "color": {"mode": "thresholds"}, "thresholds": {"mode": "absolute", "steps": [{"color": "green"}, {"color": "yellow", "value": 70}, {"color": "blue", "value": 100}]}}, "overrides": []},
+      "options": {"colorMode": "value", "graphMode": "area", "justifyMode": "center", "orientation": "horizontal", "reduceOptions": {"calcs": ["lastNotNull"], "fields": "", "values": false}, "textMode": "auto"},
+      "targets": [
+        {"expr": "hass_light_brightness_percent{job=\"tsuba-homeassistant\"}", "legendFormat": "{{friendly_name}}", "instant": true, "refId": "A"}
+      ]
+    },
+    {
+      "type": "stat",
+      "title": "Humidity",
+      "gridPos": {"h": 5, "w": 12, "x": 0, "y": 32},
+      "id": 9,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "percent", "color": {"mode": "thresholds"}, "thresholds": {"mode": "absolute", "steps": [{"color": "yellow"}, {"color": "green", "value": 30}, {"color": "yellow", "value": 65}]}}, "overrides": []},
+      "options": {"colorMode": "value", "graphMode": "area", "justifyMode": "center", "orientation": "horizontal", "reduceOptions": {"calcs": ["lastNotNull"], "fields": "", "values": false}, "textMode": "auto"},
+      "targets": [
+        {"expr": "hass_sensor_humidity_percent{job=\"tsuba-homeassistant\"}", "legendFormat": "{{friendly_name}}", "instant": true, "refId": "A"}
+      ]
+    },
+    {
+      "type": "stat",
+      "title": "Wi-Fi signal",
+      "gridPos": {"h": 5, "w": 12, "x": 12, "y": 32},
+      "id": 10,
+      "datasource": {"type": "prometheus", "uid": "${datasource}"},
+      "fieldConfig": {"defaults": {"unit": "dBm", "color": {"mode": "thresholds"}, "thresholds": {"mode": "absolute", "steps": [{"color": "red"}, {"color": "yellow", "value": -75}, {"color": "green", "value": -60}]}}, "overrides": []},
+      "options": {"colorMode": "value", "graphMode": "area", "justifyMode": "center", "orientation": "horizontal", "reduceOptions": {"calcs": ["lastNotNull"], "fields": "", "values": false}, "textMode": "auto"},
+      "targets": [
+        {"expr": "hass_sensor_signal_strength_dbm{job=\"tsuba-homeassistant\"}", "legendFormat": "{{friendly_name}}", "instant": true, "refId": "A"}
+      ]
+    }
+  ],
+  "refresh": "30s",
+  "schemaVersion": 39,
+  "tags": ["homeassistant", "tsuba"],
+  "templating": {
+    "list": [
+      {
+        "name": "datasource",
+        "type": "datasource",
+        "query": "prometheus",
+        "current": {"text": "Prometheus", "value": "Prometheus"},
+        "hide": 0,
+        "label": "Datasource"
+      }
+    ]
+  },
+  "time": {"from": "now-6h", "to": "now"},
+  "timepicker": {},
+  "timezone": "",
+  "title": "Home Assistant",
+  "uid": "homeassistant",
+  "version": 1,
+  "weekStart": ""
+}
diff --git a/nixos/tako/services/monitoring.nix b/nixos/tako/services/monitoring.nix
--- a/nixos/tako/services/monitoring.nix
+++ b/nixos/tako/services/monitoring.nix
@@ -43,6 +43,7 @@ "grafana/oidc/client_secret" = {
       key = "authelia/oidc/grafana/client_secret_plain";
       owner = "grafana";
     };
+    "homeassistant/cli-token".owner = "prometheus";
   };
 
   # Grafana configuration with Authelia OIDC
@@ -193,6 +194,7 @@ # Central Prometheus server
   services.prometheus = {
     enable = true;
     port = ports.prometheus;
+    checkConfig = "syntax-only";
 
     # Retention settings (90 days)
     retentionTime = "90d";
@@ -382,7 +384,6 @@ static_configs = [
           {
             targets = [
               "tsuba:8096" # jellyfin (built-in /metrics endpoint)
-              # "tsuba:8123" # homeassistant (configure prometheus integration)
               "tsuba:9617" # pihole-exporter
             ];
             labels = {
@@ -399,12 +400,25 @@ regex = "tsuba:8096";
             target_label = "__metrics_path__";
             replacement = "/metrics";
           }
-          # {
-          #   source_labels = ["__address__"];
-          #   regex = "tsuba:8123";
-          #   target_label = "__metrics_path__";
-          #   replacement = "/api/prometheus";
-          # }
+        ];
+      }
+
+      # Home Assistant - tsuba
+      {
+        job_name = "tsuba-homeassistant";
+        scrape_interval = "60s";
+        metrics_path = "/api/prometheus";
+        authorization.credentials_file = config.sops.secrets."homeassistant/cli-token".path;
+        scheme = "http";
+        static_configs = [
+          {
+            targets = ["tsuba:8123"];
+            labels = {
+              instance = "tsuba";
+              machine = "tsuba";
+              service = "homeassistant";
+            };
+          }
         ];
       }
 
@@ -548,6 +562,7 @@ sha256 = "0ibqj1zlznxp9vpj1jf6vkq8hj6rg63v7kih7s9bilq5zgqj4l3v";
     };
     caddyDashboard = ./caddy.json;
     giteaDashboard = ./gitea.json;
+    homeassistantDashboard = ./homeassistant.json;
     homeDashboard = ./home.json;
   in [
     "d /var/lib/grafana/dashboards 0755 grafana grafana -"
@@ -560,6 +575,7 @@ "L+ /var/lib/grafana/dashboards/pihole.json - - - - ${piholeDashboard}"
     "L+ /var/lib/grafana/dashboards/harmonia.json - - - - ${harmoniaDashboard}"
     "L+ /var/lib/grafana/dashboards/caddy.json - - - - ${caddyDashboard}"
     "L+ /var/lib/grafana/dashboards/gitea.json - - - - ${giteaDashboard}"
+    "L+ /var/lib/grafana/dashboards/homeassistant.json - - - - ${homeassistantDashboard}"
     "L+ /var/lib/grafana/dashboards/home.json - - - - ${homeDashboard}"
   ];