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+---
+layout: page
+title: "Iperf3 Sensor"
+description: "How to use Iperf3 within Home Assistant to measure your network bandwith."
+date: 2018-05-01 02:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: iperf3.png
+ha_category: System Monitor
+featured: false
+ha_release: 0.71
+ha_iot_class: "Local Polling"
+---
+
+The `iperf3` sensor component allows you to measure network bandwidth performance against a private or public Iperf3 server.
+
+## {% linkable_title Configuration %}
+
+By default, it will run every hour.  The user can change the update frequency in the config by defining the minute, hour, and day for a iperf3 test to run.
+
+To add the `iperf3` sensor to your installation, add the following to your `configuration.yaml` file:
+
+Once per hour, on the hour (default):
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  - platform: iperf3
+    host: iperf.he.net
+    monitored_conditions:
+      - download
+      - upload
+```
+
+{% configuration %}
+  monitored_conditions:
+    description: Sensors to display in the frontend.
+    required: true
+    type: list
+    keys:
+      download:
+        description: Download speed (Mbit/s)
+      upload:
+        description: Upload speed (Mbit/s)
+  host:
+    description: Specify the Iperf3 test to perform the test against.
+    required: true
+    type: string
+  duration:
+    description: Specify the test duration in seconds. Default is 10 and valid range is from 5 to 10.
+    required: false
+    default: 3
+    type: int
+  scan_interval:
+    description: Specify the frequency in seconds which the test will be perfomed. Default value is 30 minutes.
+    required: false
+    default: 1800
+    type: int
+{% endconfiguration %}
+
+You can find a list of public Iperf3 servers [here](https://iperf.fr/iperf-servers.php). You can also start your own Iperf3 server using the [mlabbe/iperf3's](https://hub.docker.com/r/mlabbe/iperf3/) docker image or just refer to your `iperf3` command's man page.
+
+The frequency when the test will be automatically triggered can be adjusted by setting the value `scan_interval` in seconds.
+
+You can use the service `sensor.iperf3_update` to trigger a manual speed test for all sensors. Iperf3 has its own service call that allow to perform a speed test on a particular entity.
+
+### {% linkable_title Service `sensor.iperf3_update` %}
+
+| Service data attribute | Description |
+| `entity_id` | String that point at `entity_id`s of the Iperf3 sensor. Else targets all.
+
+
+## {% linkable_title Notes %}
+
+- When running on Raspberry Pi, just note that the maximum speed is limited by its 100 Mbit/s LAN adapter.
+- This component requires the `iperf3` command to be installed on your OS. Please, refer to the [official Iperf3 documentation](http://software.es.net/iperf/obtaining.html) for installation instructions.
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