diff --git a/infra/telegraf/README.md b/infra/telegraf/README.md
index 0950bf5c8..a10431905 100644
--- a/infra/telegraf/README.md
+++ b/infra/telegraf/README.md
@@ -121,3 +121,15 @@ Deploy:
 pct push 143 infra/grafana/<board>.json /etc/grafana/provisioning/dashboards/<board>.json
 pct exec 143 -- systemctl restart grafana-server
 ```
+
+## aussen (Aussenfuehler, ab 26.06.2026)
+
+ESP8266-Satellit publiziert weiterhin **`oelraum/temp`** (historischer MQTT-Topic-Name).
+Telegraf mappt per `processors.override` auf **`node=aussen`** in DB `sensors`.
+
+| | Wert |
+|---|---|
+| MQTT | `oelraum/temp`, `oelraum/status` |
+| InfluxDB | `node=aussen`, measurement `temperature` |
+| Hardware | ESP8266 Aussenfuehler (ehem. „Ölraum“-Label) |
+
diff --git a/infra/telegraf/satellites.conf b/infra/telegraf/satellites.conf
index 9a0d3b3d0..9836b6698 100644
--- a/infra/telegraf/satellites.conf
+++ b/infra/telegraf/satellites.conf
@@ -6,7 +6,7 @@
   database = "sensors"
   namepass = ["temperature", "io_state", "power", "node_status"]
 
-# --- Raum-Satelliten: <raum>/temp ---
+# --- Raum-Satelliten: <raum>/temp (oelraum/temp -> node=aussen via processor) ---
 [[inputs.mqtt_consumer]]
   servers = ["tcp://127.0.0.1:1883"]
   topics = ["+/temp"]
@@ -19,6 +19,14 @@
     measurement = "_/_"
     tags = "node/_"
 
+# --- Aussenfuehler: MQTT-Topic legacy oelraum/temp (ESP8266), InfluxDB node=aussen ---
+[[processors.override]]
+  namepass = ["temperature"]
+  [processors.override.tagpass]
+    node = ["oelraum"]
+  [processors.override.tagoverride]
+    node = "aussen"
+
 # --- Heizraum: DS18B20-Temperatur(en) heizraum/<ROM> ---
 [[inputs.mqtt_consumer]]
   servers = ["tcp://127.0.0.1:1883"]