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To accomplish this, you will need to build an Application Workflow. Then, you can build a workflow with the following nodes:
- Webhook Trigger Node - this will cause a workflow to trigger when you send a message to the webhook.
- Next, you mentioned that you need to decode data. We have some great examples of that here.
- Device State Node - this allows a workflow to update the state of a device.
After you’ve reported state, then you may display this information on a Dashboard.
To help with this, I recommend going through the Losant Walkthrough. It gives a great example of reporting state and displaying data on a dashboard.