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VTX-WM1 Installation Guide v1.2 17

Appendix B

API Overview

The VTX-WM1 may be used in conjunction with third party equipment to monitor the status of

the amplier and each of it’s channels. Information can be retrieved from the monitor card and

interpreted at the third-party control equipment. To achieve this, the control equipment must be

capable of sending HTTP POST requests with URL encoded elds in the body and receiving and

interpreting XML responses from the server.

The VTX-WM1 is a monitoring solution only, it is not possible to control or manipulate audio

signals using this module. Data provided by the module is representative of the amplier state, but

is not real-time; this module cannot be used for live-sound monitoring applications. The module

can serve to one client device at a given time.

This documentation is provided as an overview, not the complete API specication. Check our

website www.cloud.co.uk or contact us for more complete specication of this API.

Interaction basics

Example POST request body

obj-type=unit&unit-id=0&req=update&doc-format=xml

All enquiries are made to the same target destination: /hwtest.htm

Requests are URL-encoded, HTTP Posts.

The VTX-WM1 responds based on two main elds in the request body:

1. req

This species the type of request to be made; update fetches up-to-date information from the

VTX-WM1, commit pushes new values to the VTX-WM1.

2. obj-type

This species the data type for the request (site, unit or channel)

Where unit or channel sensitive information is being requested, the unit-id eld must be specied.

For channels, the chnum eld may be used to specify a specic channel [1-4], otherwise a list of all

channels on the unit is returned.

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Cloud-electronics VTX-WM1 Bedienungsanleitung Seite 17