Create and send commands to IoT devices

  • 3 minutes

When a device isn't working properly, the system receives an alert. To troubleshoot the issue remotely, you can send a command by choosing a registered device or by using an existing IoT alert. The command is sent to IoT Hub, which then sends a cloud-to-device message.

Create a command

Typically, commands are formulated as JSON. You can construct a command manually or use a command definition, which is a set of preconfigured properties that you can add to a command.

You can send a command from an IoT alert or IoT device.

Selecting Send Command generates a pop-up form, where you can select a command definition or enter a command in the Message field.

Screenshot of the Send Command pop-up form.

For example, you could enter the following JSON string to reset a device.

{"CommandName":"Reset","Parameters":{"Reset":true}}

Selecting an existing command definition generates the JSON from the properties, as shown in the following screenshot.

Screenshot of the Send Command pop-up form, showing the Command Details information.

Note

Because the command is generated as JSON in Dynamics 365, you need to add a Parse JSON action to extract the properties from the command and set the fields in the Run a device command action.