Output Layers

[pwood]

Output layers are a concept that allow multiple different interfaces/internal controller applications to share capabilites on devices, with each application having a priority.

Use case 1 (dual demand):

• User switches on light in bathroom, this also asserts an extration fan should be on, fan goes on.
• The environmental system sees high humidity in the bathroom, and asserts the fan should be on.
• User switches off the light in bathroom, asserts the fan to be off, the fan remains on because the humidity is still too high.
• Humidity drops below a water mark, asserts fan to be off, fan goes off.

Use case 2 (conflicting demand):

• User switches on light, light asserts on, warm white. Light turns on to warm white.
• Alarm system goes into alarm, asserts light red. Light turns red.
• Alarm system cleans alarm, unasserts light red. Light results to be warm white.

To Do

• Add Go interfaces to controller for stack and layer.
• Pass stack and layer to HTTP interface.
• Implement dumb pass thru layer.
• Allow selection of layer and retention policy to HTTP interface (default HTTP layer is http).
• Implement resolving layers, intercepting capabilities that have an output to a device.
• Enable creation of multiple layers in configuration, with priority assigned by order.