Datasources provide the mechanism for widgets to access IoT system data and end users to interact with an IoT system.

Configuration details for each datasource can be found in the ClearBlade docs (https://docs.clearblade.com/v/4/portal)

The following slides will describe each of the datasource options.

Code Service

Links to a code service defined within the ClearBlade platform.

• Requires the user role to have permissions to execute the service

Collection

Fetches an entire data collection.

• Requires the user role to have permissions to read the data collection

Device

Provides access to devices defined within a ClearBlade system.

• Requires the user role to have permissions to access the device

Device List

Retrieves all the devices in the system

Edge List

Fetches a list of system Edges.

Edge Metrics

Resources stats for the edge

Message Topic

Fetches the most recent message for a specific topic.

• Requires the user role to have permissions to read the system’s message history

Users List

Fetches a list of users in the current system.

• Requires the user role to have permissions to read the user list.

Local Variable

Allows widgets to share data within a portal.

Aggregator

Access multiple datasources within the portal

HTTP

Make custom HTTP requests within the portal