node-red-contrib-virtual-smart-home/examples/alexa_to_homeassistant.json

A Node-RED node that represents a 'virtual device' which can be controlled via Alexa. Requires the virtual smart home skill to be enabled for your Amazon account.

[
  {
    "id": "affffc88a48e1001",
    "type": "subflow",
    "name": "Alexa -> Home Assistant",
    "info": "",
    "category": "",
    "in": [{ "x": 60, "y": 80, "wires": [{ "id": "2565add7dc2c886d" }] }],
    "out": [],
    "env": [],
    "meta": {},
    "color": "#039be5",
    "icon": "font-awesome/fa-home",
    "status": {
      "x": 320,
      "y": 160,
      "wires": [{ "id": "2e59c216b911bfdf", "port": 0 }]
    }
  },
  {
    "id": "2565add7dc2c886d",
    "type": "function",
    "z": "affffc88a48e1001",
    "name": "convert",
    "func": "// Mapping of directives to Home Assistant services\nconst directiveToServiceMapping = {\n    TurnOff: \"turn_off\",\n    TurnOn: \"turn_on\",\n    SetBrightness: \"turn_on\",\n    SetColorTemperature: \"turn_on\",\n    SetColor: \"turn_on\",\n    AdjustBrightness: \"turn_on\"\n};\n\n// Extract metadata from the message, defaulting to an empty object\nconst { domain, entityId } = msg.metadata ?? {};\nconst service = directiveToServiceMapping[msg.payload.directive];\n\n// Set the node status visually in the Node-RED flow\nupdateNodeStatus(service, msg.payload.directive);\n\n// Generate payload data based on the service and message\nconst payloadData = generatePayloadData();\n\n// Construct and return the full payload\nreturn constructPayload(domain, service, payloadData);\n\n// Function definitions below\n\nfunction updateNodeStatus(service, directive) {\n    node.status({\n        fill: service === 'turn_on' ? 'yellow' : 'grey',\n        shape: 'dot',\n        text: directive\n    });\n}\n\nfunction generatePayloadData() {\n    const data = { entity_id: `${domain}.${entityId}` };\n\n    if (service === \"turn_on\") {\n        Object.assign(data, handleTurnOnConditions());\n    }\n\n    return data;\n}\n\nfunction handleTurnOnConditions() {\n    const data = {};\n    if (hasBrightness()) {\n        data.brightness_pct = msg.payload.brightness;\n    }\n    if (isColorModeHSB()) {\n        data.xy_color = msg.payload.color_xy;\n    }\n    if (isTemperatureMode()) {\n        data.color_temp = convertKelvinToMireds(msg.payload.colorTemperatureInKelvin);\n    }\n    return data;\n}\n\nfunction hasBrightness() {\n    return msg.payload.brightness !== undefined;\n}\n\nfunction isColorModeHSB() {\n    return msg.payload.color_xy !== undefined && msg.payload.lightMode === \"hsb\";\n}\n\nfunction isTemperatureMode() {\n    return msg.payload.colorTemperatureInKelvin !== undefined && msg.payload.lightMode === \"temp\";\n}\n\nfunction convertKelvinToMireds(kelvin) {\n    // Converts Kelvin to Mireds to comply with Home Assistant's expected units\n    return Math.round(1000000 / kelvin);\n}\n\nfunction constructPayload(domain, service, data) {\n    return {\n        payload: {\n            domain,\n            service,\n            data\n        }\n    };\n}\n",
    "outputs": 1,
    "timeout": "",
    "noerr": 0,
    "initialize": "",
    "finalize": "",
    "libs": [],
    "x": 200,
    "y": 80,
    "wires": [["d6bd4dac36a284ea"]]
  },
  {
    "id": "d6bd4dac36a284ea",
    "type": "api-call-service",
    "z": "affffc88a48e1001",
    "name": "",
    "server": "",
    "version": 5,
    "debugenabled": false,
    "domain": "",
    "service": "",
    "areaId": [],
    "deviceId": [],
    "entityId": [],
    "data": "",
    "dataType": "jsonata",
    "mergeContext": "",
    "mustacheAltTags": false,
    "outputProperties": [],
    "queue": "none",
    "x": 370,
    "y": 80,
    "wires": [[]]
  },
  {
    "id": "2e59c216b911bfdf",
    "type": "status",
    "z": "affffc88a48e1001",
    "name": "",
    "scope": ["2565add7dc2c886d"],
    "x": 200,
    "y": 160,
    "wires": [[]]
  },
  {
    "id": "9fe9a12665bce27b",
    "type": "comment",
    "z": "affffc88a48e1001",
    "name": "READ ME!",
    "info": "# Please note\n\nYou must have the package `node-red-contrib-home-assistant-websocket` installed in order for this subflow to work!",
    "x": 380,
    "y": 40,
    "wires": []
  },
  {
    "id": "1ecc03b0.52929c",
    "type": "vsh-virtual-device",
    "z": "3156dd60.366d12",
    "name": "Kitchen Light",
    "topic": "",
    "metadata": "{\"domain\":\"light\",\"entityId\":\"kitchen\"}",
    "connection": "",
    "template": "SWITCH",
    "retrievable": false,
    "passthrough": false,
    "diff": false,
    "filter": false,
    "filterTopic": false,
    "x": 111,
    "y": 280,
    "wires": [["f057c4815e3be504"]]
  },
  {
    "id": "f057c4815e3be504",
    "type": "subflow:affffc88a48e1001",
    "z": "3156dd60.366d12",
    "name": "",
    "x": 430,
    "y": 280,
    "wires": []
  }
]