A lightweight, cross-platform controller and viewer for Foscam HD webcams written entirely in HTML/JavaScript.

Foscam provides browser plugins and smartphone apps to control their line of HD webcams. The browser plugins are completely closed-source however (really, ActiveX?!), and don't work on Linux.

Fortunately, Foscam publishes an SDK. The SDK documents CGI commands that you can send to control the camera and view images.

I wanted a lightweight, cross-platform application that could run on a local computer or on a web server. So I created a self-contained HTML page that provides the following functionality:

• Pan and tilt controls.

• Set the camera hostname / IP address, image refresh rate, and length of time a pan/tilt command runs.

• A view pane that displays snapshots from the camera at a user-defined interval.

• A view pane that displays the raw results returned by the camera after each CGI command.

The page sends URLs to the camera by dynamically modifying the 'src' attribute of <img> and <iframe> elements. This removes the need for third-party plugins, XMLHttpRequest() objects (with their associated cross-origin issues), etc.

I developed and tested this using a Foscam FI9821W V2, and it should work with other Foscam HD cameras. (Foscam's non-HD cameras use a different set of CGI commands.)

Save the FoscamView.html file locally on your computer, or host it on a web server -- it works either way.

You must change some of the default parameters in the page's JavaScript section to get the CGI commands to work with your own webcam. Specifically:

• host: Although you can change this value through the user interface, by setting it in the code you have a persistent default value every time you reload the page.

• username: The webcam account's username ("administrator" level privileges are not necessary; the "operator" level is enough). You can set up users through the regular Foscam web interface.

• password: The webcam account's password.

Optionally, you can also change the following values in the code to set persistent default values:

• viewerRefresh: How often (in milliseconds) the viewer pane updates with a new snapshot from the webcam.

• panTiltDuration: How long a pan or tilt command is allowed to run (in milliseconds). A smaller value means slower webcam movement.

Here are some screenshots: