---
title: Create an Email-Alert Based Trigger for DeviceHub Devices
slug: bhdm/create-an-email-alert-based-trigger-for-devicehub-devices
createdAt: 2023-09-27T13:36:58.378Z
---

In this use case, you will set up an alert and a trigger for a Belden Horizon Data Operations (BHDO) device. Then you will simulate an error output so that an alert is triggered. When the alert is triggered, the email addresses specified in the trigger will receive an email with information about the alert and 

# Before You Begin

- You will have to enable SMTP from the Belden Horizon Data Manager (BHDM) Admin Console. See [Email](docId\:L2yv7i3mkj2HVMA2bLbXu) to learn more. 
- If you haven't yet connected your BHDO instance to BHDM, see [Activate an Edge Device](docId\:bbgh94p0zHJUZ0JuaO6bY). 

# Step 1: Add Device

Follow the steps to [Connect a Device](docId\:T-cWPe0_Jsfw5-aoj8WPP). Select the Device Type **Simulator **and Driver Name **Generator**.

# Step 2: Add Tag

After connecting the device, you can [Add a Tag](docId\:Wpe2HMXelARLBnhWbuChY) to the device.

Configure the following for the tag: 

- **Name: **S - Random value generator
- **Value Type**: string

# Step 3: Import Topic into Default Generic MQTT SSL Connector

You will next import the tag you've created as a topic into the generic MQTT SSL connector that connects BHDO to BHDM. 

**To import the tag into the generic MQTT SSL connector:**

1. Log in to Belden Horizon Data Operations. 
2. Navigate to **Integration**. 
3. Click the *generic-mqtt-ssl* connector tile. 
4. Click the **Topics **tab. 

   ::Image[]{src="https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/FM_MUUScg0UBVjz0wogE-_topics-tab.png" size="60" width="520" height="417" position="center" showCaption="false"}
5. Click the **Import from DeviceHub** tags icon. 
   The *DeviceHub Import dialog* box appears. 

   ![](https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/iZskiViXoKd6dDTruWsjo_import-topics-icon.png)
6. Select the check box to import the tag from the device you created earlier and click **Import**. 

   ::Image[]{src="https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/b2FQvyBRnMBp4ts4WFUPS_6kan2u3ny1gcm2detnidevicehub-import.png" size="80" width="962" height="272" position="center" showCaption="false"}
7. Click the **Enable all topics** icon.

   ![](https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/jn7D1SYa1NiNBsRiaV4kI_enable-all-topics-icon.png)
8. Return to the *Integration *pane and toggle the connect option and confirm the status is `CONNECTED`. 

   ::Image[]{src="https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/njSCoCUVShDB_KY1mcuLo_integration-tile-toggle.png" size="50" width="389" height="264" position="center" showCaption="false"}

# Step 4: Set Up an Email-Alert based Trigger 

In this step you will create an email notification alert. Next, you will create a trigger that will use the email notification alert. See [Alerts](docId\:qcRiKcFeXyjQAbqJTKJmr) for additional details.

From Belden Horizon Data Manager, navigate to **Alerts **and follow the steps below. 

## Step 4a: Set Up an Email Alert

**To set up an email alert: **

1. From the *Alerts *pane, click the **Add new Action** icon.  
   The *Add new Action* dialog box appears.

   ![](https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/gpxRjr-z6VVGItL8LK2ib_add-new-action.png)
2. From the *Add new Action* dialog box, enter the following details:
   - **Action Template**: Select EMAIL.
   - **Action Name**: Enter an action name. 
   - **Enter email**: Enter an email address that will receive the alert.
   - **Notifications Limit**: Enter 1. 
   - **Interval**: Select *minute*.
3. Click **Add**. 
   The newly created action appears in the *Action List*.

::Image[]{src="https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/12fxB2Jd2r2gu7ixNdevB_image.png" size="80" width="1554" height="496" caption="Creating a new email alert" position="center" showCaption="true"}

## Step 4b: Set Up a Trigger

**To set up a trigger: **

1. From the *Alerts *pane, click the **Add new Trigger** icon. 
   The *New Trigger* pane appears.

   ![](https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/a8QbqLLtuSCg8cZrMWJmv_add-new-trigger.png)
2. From the *New Trigger* pane, configure the following sections. 

### Trigger

- **Name**: Enter a name for the trigger.
- **Active**: Select the checkbox.
- **Dashboard**: Select the checkbox.
- **Description**: Enter a description for the trigger.

### Scope

Select** Edge Device **and select the appropriate BHDO instance. 

### Source

- Select** Metrics **as the source of the trigger.
- Click **Add **new rule.
- **Select Alert template**: Select *DH device data quality.*
  - For *Target Value, msgs/minute,* enter 1 minute.
  - For *Alert Delay, seconds, *enter 60 seconds. 

### Action

- **Action List**: Select the action you previously created.
- **Continuously**: Select the checkbox to send notifications continuously.  
- **Notification Period, minutes**: Enter 1.

When done, click **Save**. 
The alert trigger appears in the *Trigger List*.

![](https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/8howynzDs9aw_tdcYxZgj_image.png)

# Step 5: Simulate Invalid/Corrupted Data

From Belden Horizon Data Operations, you will simulate the DeviceHub driver sending invalid/corrupted data.

**To simulate a disconnection:**

1. Log in to Belden Horizon Data Operations.
2. From the navigation panel, navigate to **DeviceHub **> **Tags**.

   The *Tags* pane appears.
3. Click the **Action menu** for the tag you created and select **Edit**. 

   ![](https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/tvkppn97og9nhIWOInMkn_edit-tag.png)
4. For the **Value Type** field, select float64.
5. For the **Formula** field, corrupt the *Formula* field by replacing the `s` in `sin` with `1` so that the final formula starts with `1in`. Then, click **Update Tag**. 

::Image[]{src="https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/SbKcMpkwo-Ei3WUF_VYVP_image.png" size="80" width="1176" height="705" caption="Corrupted Tag Formula" position="center" showCaption="true"}

# Step 6: Verify Successful Trigger and Alert

From Belden Horizon Data Manager, you will verify the simulated error rate.

**To verify the successful trigger and alert:**

1. Log in to Belden Horizon Data Manager.
2. Select the appropriate company and project.
   The *Dashboard *pane appears for the project.
3. From the navigation panel, select **Incidents**.
   The *Incidents *pane appears. Review that the incidents display in the list. 

The email address that was entered from *Step 4a: Set up an Email Alert* will also receive the respective alert email.