Overview

The MQTT Event Monitor checks messages distributed by an MQTT message broker for their contents. It can alert based on missing or present text.

Use Cases

• Monitoring MQTT messages for error text

Monitoring Options

This event monitor provides the following options:

Broker Address

Enter the address of the broker you wish to contact.

Topics

Enter the topics to check. Use the format "topic_level/+/topic_level/#". To specify multiple topics, enter them on separate lines.

Alert with [Info/Warning/Error/Critical] if the device cannot be contacted

Use this option to receive an alert if the event monitor cannot contact the device.

Alert with [Info/Warning/Error/Critical] if topics contain the text [text]

Use this option to receive alerts if the specified text is found in the topics.

Alert with [Info/Warning/Error/Critical] if topics do not contain the text [text]

Use this option to receive alerts if the specified text is not found in the topics.

Parse message content as [text/JSON]

When parsing with text, you can check the content of messages and alert based on whether text strings are found or not found within it. Parsing as JSON lets you specify attributes in the JSON and define how to alert on them. Parsing as JSON also allows you to collect graph data points for the values you choose.

Alert with [Info/Warning/Error/Critical] if messages contain the text [text]

Use this option to receive alerts if the specified text is found in the messages.

Alert with [Info/Warning/Error/Critical] if messages do not contain the text [text]

Use this option to receive alerts if the specified text is not found in the messages.

Authentication and Security

Protocols

Data Points

This event monitor generates the following data points:

Data Point	Description
Average Response Time	The calculated average ping response time.
CPU Usage	The total CPU used, by percent.
Used Memory	The percentage of total memory used.
Space used: C;	The percentage of space used in the C drive.

Sample Output