add-section <name> <width>
Sent from any device to the Screen Console Manager (_screen) HUD. Adds a new section; the HUD will reply with add-section-confirm. <name> should be a short unique identifier, such as the device address; <width> is the number of icons that the device intends to display. Not supported by the Native Console (_native) HUD; see icon-q instead.

It is not possible to add custom gauges or meters to the Screen HUD. There is no way to remove or modify a button or section from the Screen Console Manager once it has been added.