Advantech USB-4704

The foglamp-south-usb4704 plugin is a south plugin that is designed to gather data from an Advantech USB-4704 data acquisition module. The module supports 8 digital inputs and 8 analogue inputs. It is possible to configure the plugin to combine multiple digital input to create a single numeric data point or have each input as a boolean data point. Each analogue input, which is a 14 bit analogue to digital converter, becomes a single numeric data point in the range 0 to 16383, although a scale and offset may be applied to these values.

To create a south service with the USB-4704

• Click on South in the left hand menu bar

• Select usb4704 from the plugin list

• Name your service and click Next

• Configure the plugin

  • Asset Name: The name of the asset that will be created with the values read from the USB-4704

  • Connections: A JSON document that describes the connections to the USB-4704 and the data points within the asset that they map to. The JSON document is a set of objects, one per data point. The objects contain a number of key/value pairs as follow

    Key	Description
    type	The type of connection, this may be either digital or analogue.
    pin	The analogue pin used for the connection.
    pins	An array of pins for a digital connection, the first element in the array becomes the most significant bit of the numeric value created.
    name	The data point name within the asset.
    scale	An optional scale value that may be applied to the value.

• Click on Next

• Enable your service and click on Done