// Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const gpioMachine = Machine({
    "id": "hydrogel",
    "initial": "Inactive",
    "states": {
        "Inactive": {
            "activities": [ { "type": "beep", "id": "inactive" } ],
            "on": {
                "PRESENCE": {
                    "target": "Active",
                    "actions": [ "notify"]
                }
            },
            "initial": "InactiveLocked",
            "states": {
                "InactiveLocked": {
                    "on": {
                        "PRESENCE": "InactiveLocked",
                        "INACTIVE_LOCKED_DELAY": "InactiveUnlocked"
                    }
                },
                "InactiveUnlocked": {
                    "activities": [ "beep" ]
                }
            }            
        },
        "Active": {
                    "activities": [ { "type": "gpio", "id": "active-inactive" } ],
                    "on": {
                        "ABSENCE": "Inactive",
                        "ACTIVE_DELAY": "Inactive"
                    }
        }
    }
});