diff --git a/infra/grafana/oelknoten.json b/infra/grafana/oelknoten.json
index e69de29bb..70880cb86 100644
--- a/infra/grafana/oelknoten.json
+++ b/infra/grafana/oelknoten.json
@@ -0,0 +1,628 @@
+{
+  "uid": "oelknoten",
+  "title": "Ölknoten",
+  "tags": [
+    "oelknoten",
+    "temperatur",
+    "erdtrasse"
+  ],
+  "timezone": "browser",
+  "schemaVersion": 39,
+  "version": 2,
+  "refresh": "30s",
+  "panels": [
+    {
+      "id": 1,
+      "gridPos": {
+        "h": 4,
+        "w": 4,
+        "x": 0,
+        "y": 0
+      },
+      "type": "stat",
+      "title": "Status",
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "red",
+                "value": null
+              },
+              {
+                "color": "green",
+                "value": 1
+              }
+            ]
+          },
+          "mappings": [
+            {
+              "type": "value",
+              "options": {
+                "1": {
+                  "text": "ONLINE",
+                  "color": "green",
+                  "index": 0
+                },
+                "0": {
+                  "text": "OFFLINE",
+                  "color": "red",
+                  "index": 1
+                }
+              }
+            },
+            {
+              "type": "special",
+              "options": {
+                "match": "null",
+                "result": {
+                  "text": "OFFLINE",
+                  "color": "red",
+                  "index": 2
+                }
+              }
+            }
+          ],
+          "noValue": "OFFLINE",
+          "color": {
+            "mode": "thresholds"
+          }
+        }
+      },
+      "options": {
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ]
+        },
+        "orientation": "auto",
+        "textMode": "auto",
+        "colorMode": "background",
+        "graphMode": "none",
+        "justifyMode": "auto"
+      },
+      "targets": [
+        {
+          "refId": "A",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"node_status\" WHERE \"node\"='oelknoten'",
+          "rawQuery": true
+        }
+      ]
+    },
+    {
+      "id": 2,
+      "gridPos": {
+        "h": 4,
+        "w": 4,
+        "x": 4,
+        "y": 0
+      },
+      "type": "stat",
+      "title": "Raum",
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "decimals": 1,
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "blue",
+                "value": null
+              },
+              {
+                "color": "green",
+                "value": 10
+              },
+              {
+                "color": "orange",
+                "value": 25
+              },
+              {
+                "color": "red",
+                "value": 35
+              }
+            ]
+          },
+          "color": {
+            "mode": "thresholds"
+          }
+        }
+      },
+      "options": {
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ]
+        },
+        "orientation": "auto",
+        "textMode": "auto",
+        "colorMode": "background",
+        "graphMode": "none",
+        "justifyMode": "auto"
+      },
+      "targets": [
+        {
+          "refId": "A",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='oelknoten' AND \"sensor\"='raum' AND $timeFilter",
+          "rawQuery": true
+        }
+      ]
+    },
+    {
+      "id": 3,
+      "gridPos": {
+        "h": 4,
+        "w": 4,
+        "x": 8,
+        "y": 0
+      },
+      "type": "stat",
+      "title": "HK Vorlauf",
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "decimals": 1,
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "blue",
+                "value": null
+              },
+              {
+                "color": "green",
+                "value": 10
+              },
+              {
+                "color": "orange",
+                "value": 40
+              },
+              {
+                "color": "red",
+                "value": 60
+              }
+            ]
+          },
+          "color": {
+            "mode": "thresholds"
+          }
+        }
+      },
+      "options": {
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ]
+        },
+        "orientation": "auto",
+        "textMode": "auto",
+        "colorMode": "background",
+        "graphMode": "none",
+        "justifyMode": "auto"
+      },
+      "targets": [
+        {
+          "refId": "A",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='oelknoten' AND \"sensor\"='hk_vorlauf' AND $timeFilter",
+          "rawQuery": true
+        }
+      ]
+    },
+    {
+      "id": 4,
+      "gridPos": {
+        "h": 4,
+        "w": 4,
+        "x": 12,
+        "y": 0
+      },
+      "type": "stat",
+      "title": "Erd VL",
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "decimals": 1,
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "blue",
+                "value": null
+              },
+              {
+                "color": "green",
+                "value": 10
+              },
+              {
+                "color": "orange",
+                "value": 40
+              },
+              {
+                "color": "red",
+                "value": 60
+              }
+            ]
+          },
+          "color": {
+            "mode": "thresholds"
+          }
+        }
+      },
+      "options": {
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ]
+        },
+        "orientation": "auto",
+        "textMode": "auto",
+        "colorMode": "background",
+        "graphMode": "none",
+        "justifyMode": "auto"
+      },
+      "targets": [
+        {
+          "refId": "A",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='oelknoten' AND \"sensor\"='vl_erd_an' AND $timeFilter",
+          "rawQuery": true
+        }
+      ]
+    },
+    {
+      "id": 5,
+      "gridPos": {
+        "h": 4,
+        "w": 4,
+        "x": 16,
+        "y": 0
+      },
+      "type": "stat",
+      "title": "Erd RL",
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "decimals": 1,
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "blue",
+                "value": null
+              },
+              {
+                "color": "green",
+                "value": 10
+              },
+              {
+                "color": "orange",
+                "value": 30
+              },
+              {
+                "color": "red",
+                "value": 45
+              }
+            ]
+          },
+          "color": {
+            "mode": "thresholds"
+          }
+        }
+      },
+      "options": {
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ]
+        },
+        "orientation": "auto",
+        "textMode": "auto",
+        "colorMode": "background",
+        "graphMode": "none",
+        "justifyMode": "auto"
+      },
+      "targets": [
+        {
+          "refId": "A",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='oelknoten' AND \"sensor\"='rl_erd_ab' AND $timeFilter",
+          "rawQuery": true
+        }
+      ]
+    },
+    {
+      "id": 6,
+      "gridPos": {
+        "h": 12,
+        "w": 24,
+        "x": 0,
+        "y": 4
+      },
+      "type": "timeseries",
+      "title": "Temperaturen",
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "custom": {
+            "drawStyle": "line",
+            "lineInterpolation": "linear",
+            "barAlignment": 0,
+            "lineWidth": 2,
+            "fillOpacity": 10,
+            "gradientMode": "none",
+            "spanNulls": 300000,
+            "showPoints": "never",
+            "pointSize": 5,
+            "stacking": {
+              "mode": "none",
+              "group": "A"
+            },
+            "axisPlacement": "auto",
+            "axisLabel": "",
+            "axisColorMode": "text",
+            "scaleDistribution": {
+              "type": "linear"
+            },
+            "axisCenteredZero": false,
+            "hideFrom": {
+              "tooltip": false,
+              "viz": false,
+              "legend": false
+            },
+            "thresholdsStyle": {
+              "mode": "off"
+            }
+          }
+        }
+      },
+      "options": {
+        "legend": {
+          "displayMode": "table",
+          "placement": "bottom",
+          "calcs": [
+            "last",
+            "mean",
+            "max"
+          ]
+        },
+        "tooltip": {
+          "mode": "multi",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "refId": "A",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT mean(\"value\") FROM \"temperature\" WHERE \"node\"='oelknoten' AND $timeFilter GROUP BY time($__interval), \"sensor\"",
+          "rawQuery": true
+        }
+      ]
+    },
+    {
+      "id": 7,
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 16
+      },
+      "type": "timeseries",
+      "title": "Erdtrasse ΔT (VL − RL)",
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "custom": {
+            "drawStyle": "line",
+            "lineInterpolation": "linear",
+            "barAlignment": 0,
+            "lineWidth": 2,
+            "fillOpacity": 20,
+            "gradientMode": "none",
+            "spanNulls": 300000,
+            "showPoints": "never",
+            "pointSize": 5,
+            "stacking": {
+              "mode": "none",
+              "group": "A"
+            },
+            "axisPlacement": "auto"
+          }
+        }
+      },
+      "options": {
+        "legend": {
+          "displayMode": "table",
+          "placement": "bottom",
+          "calcs": [
+            "last",
+            "mean"
+          ]
+        },
+        "tooltip": {
+          "mode": "multi",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "refId": "vl_erd_an",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT mean(\"value\") FROM \"temperature\" WHERE \"node\"='oelknoten' AND \"sensor\"='vl_erd_an' AND $timeFilter GROUP BY time($__interval)",
+          "rawQuery": true,
+          "hide": false
+        },
+        {
+          "refId": "rl_erd_ab",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT mean(\"value\") FROM \"temperature\" WHERE \"node\"='oelknoten' AND \"sensor\"='rl_erd_ab' AND $timeFilter GROUP BY time($__interval)",
+          "rawQuery": true,
+          "hide": false
+        }
+      ],
+      "transformations": [
+        {
+          "id": "calculateField",
+          "options": {
+            "mode": "binary",
+            "binary": {
+              "left": "vl_erd_an.value",
+              "operator": "-",
+              "right": "rl_erd_ab.value"
+            },
+            "alias": "ΔT VL−RL"
+          }
+        },
+        {
+          "id": "organize",
+          "options": {
+            "excludeByName": {
+              "rl_erd_ab.value": true,
+              "vl_erd_an.value": true,
+              "ΔT VL−RL": false
+            }
+          }
+        }
+      ],
+      "description": "Temperaturdifferenz Vorlauf minus Rücklauf der Erdtrasse. Bei laufender Heizung/Kühlung zeigt ΔT, ob Wärme in den Boden ab- oder aufgenommen wird. Im Sommer ohne Durchfluss liegen VL und RL dicht beieinander (~0 K)."
+    },
+    {
+      "id": 8,
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 16
+      },
+      "type": "timeseries",
+      "title": "Erdtrasse (VL + RL)",
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "custom": {
+            "drawStyle": "line",
+            "lineInterpolation": "linear",
+            "barAlignment": 0,
+            "lineWidth": 2,
+            "fillOpacity": 10,
+            "gradientMode": "none",
+            "spanNulls": 300000,
+            "showPoints": "never",
+            "pointSize": 5,
+            "stacking": {
+              "mode": "none",
+              "group": "A"
+            },
+            "axisPlacement": "auto"
+          }
+        }
+      },
+      "options": {
+        "legend": {
+          "displayMode": "table",
+          "placement": "bottom",
+          "calcs": [
+            "last",
+            "mean"
+          ]
+        },
+        "tooltip": {
+          "mode": "multi",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "refId": "A",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT mean(\"value\") FROM \"temperature\" WHERE \"node\"='oelknoten' AND (\"sensor\"='vl_erd_an' OR \"sensor\"='rl_erd_ab') AND $timeFilter GROUP BY time($__interval), \"sensor\"",
+          "rawQuery": true
+        }
+      ],
+      "description": "Vorlauf (vl_erd_an) und Rücklauf (rl_erd_ab) der Erdtrasse im Vergleich. VL = Wasser in den Erdwärmetauscher, RL = zurück zum System. Zum Prüfen der Sensor-Zuordnung: bei Betrieb muss VL deutlich von RL abweichen."
+    }
+  ],
+  "time": {
+    "from": "now-6h",
+    "to": "now"
+  },
+  "id": null,
+  "links": [
+    {
+      "title": "Nebengelass / Erdtrasse",
+      "type": "link",
+      "url": "/d/heizung_nebengelass",
+      "icon": "dashboard",
+      "targetBlank": false
+    }
+  ]
+}
\ No newline at end of file