GREAT LOTUSInstall

Summary

Publishes a debug request over MQTT to check the connection between the node, broker, and client. Set the required topic and remote CDP port, then choose test values and whether to wait for a response; the payload includes the configured debug fields.

Inputs

• Topic (required) — MQTT topic to publish to, such as a device or action topic.
• Remote Port (required) — CDP port used to route the request to the intended client session. The field defaults from remote_debugging_port on the incoming item.
• QoS — MQTT delivery level; defaults to 1.
• Include Input Items — Optionally include selected fields from incoming items in payload.inputItems.
• Wait For Response — When enabled, wait for an MQTT response before returning; the response timeout is configurable in seconds. Otherwise, publish without waiting.
• Delay Next Step — Delay in milliseconds before continuing. Runs after the response when waiting, or after publishing otherwise.
• Debug payload fields — Optional test values for text, dropdowns, multi-options, boolean, number, color, date/time, JSON, and structured fields such as collections, filters, assignments, workflow selector, cURL import, and resource locator.

Output shape

A list of items

The operation publishes the configured debug payload. With Wait For Response enabled, output is produced after a response arrives or the timeout is reached; without it, output follows publish and the configured delay. The source pack is a signature-level view, so the exact returned item fields are not visible.

Links

• n8n community nodes installation guide