BB.Controller.Threshold (bb v0.15.0)

Convenience wrapper around PatternMatch for threshold monitoring.

Transforms threshold options into a PatternMatch configuration and delegates all message handling to PatternMatch.

Options

• :topic - PubSub topic path to subscribe to (required)
• :field - Field path to extract from message payload (required)
• :min - Minimum acceptable value (at least one of min/max required)
• :max - Maximum acceptable value (at least one of min/max required)
• :action - Action to trigger when threshold exceeded (required)
• :cooldown_ms - Minimum ms between triggers (default: 1000)

Example

controller :over_current, {BB.Controller.Threshold,
  topic: [:sensor, :servo_status],
  field: :current,
  max: 1.21,
  action: command(:disarm)
}

This is equivalent to:

controller :over_current, {BB.Controller.PatternMatch,
  topic: [:sensor, :servo_status],
  match: fn msg -> Map.get(msg.payload, :current) > 1.21 end,
  action: command(:disarm)
}