HA - NR - Low Battery Level Alert

[
    {
        "id": "8ffd3e02.3f032",
        "type": "tab",
        "label": "Low battery notification",
        "disabled": false,
        "info": "## Flow for sending low battery notification\n**By Anders Lukic**\n\n---\n\nThis flow sends a notification once every day at 20.00 if one or more devices has a low battery (less than 30%)\n\nThe message will include names of the devices as well as the current battery level."
    },
    {
        "id": "c13c10f4.16466",
        "type": "template",
        "z": "8ffd3e02.3f032",
        "name": "Battery msg",
        "field": "payload",
        "fieldType": "msg",
        "format": "handlebars",
        "syntax": "mustache",
        "template": "{{payload.attributes.friendly_name}} - {{payload.state}}%",
        "output": "str",
        "x": 490,
        "y": 120,
        "wires": [
            [
                "924ec17d.6fdbb"
            ]
        ]
    },
    {
        "id": "c0d7dbc7.645068",
        "type": "join",
        "z": "8ffd3e02.3f032",
        "name": "Combine msgs",
        "mode": "custom",
        "build": "string",
        "property": "payload",
        "propertyType": "msg",
        "key": "topic",
        "joiner": "[92,110]",
        "joinerType": "bin",
        "accumulate": false,
        "timeout": "",
        "count": "",
        "reduceRight": false,
        "reduceExp": "",
        "reduceInit": "",
        "reduceInitType": "",
        "reduceFixup": "",
        "x": 900,
        "y": 120,
        "wires": [
            [
                "7a7629fd.6ffa78"
            ]
        ]
    },
    {
        "id": "ec1819db.fb8c38",
        "type": "ha-get-entities",
        "z": "8ffd3e02.3f032",
        "server": "3bebce79.1e0962",
        "name": "Get battery levels",
        "rules": [
            {
                "property": "attributes.device_class",
                "logic": "is",
                "value": "battery",
                "valueType": "str"
            },
            {
                "property": "attributes.unit_of_measurement",
                "logic": "is",
                "value": "%",
                "valueType": "str"
            },
            {
                "property": "state",
                "logic": "lte",
                "value": "30",
                "valueType": "num"
            }
        ],
        "output_type": "split",
        "output_empty_results": false,
        "output_location_type": "msg",
        "output_location": "payload",
        "output_results_count": 1,
        "x": 310,
        "y": 120,
        "wires": [
            [
                "c13c10f4.16466"
            ]
        ]
    },
    {
        "id": "924ec17d.6fdbb",
        "type": "string",
        "z": "8ffd3e02.3f032",
        "name": "Remove battery level text",
        "methods": [
            {
                "name": "replaceAll",
                "params": [
                    {
                        "type": "str",
                        "value": " Battery Level"
                    },
                    {
                        "type": "str",
                        "value": ""
                    }
                ]
            },
            {
                "name": "replaceAll",
                "params": [
                    {
                        "type": "str",
                        "value": " battery state"
                    },
                    {
                        "type": "str",
                        "value": ""
                    }
                ]
            }
        ],
        "prop": "payload",
        "propout": "payload",
        "object": "msg",
        "objectout": "msg",
        "x": 690,
        "y": 120,
        "wires": [
            [
                "c0d7dbc7.645068"
            ]
        ]
    },
    {
        "id": "164d92d1.209d5d",
        "type": "inject",
        "z": "8ffd3e02.3f032",
        "name": "Run at 20.00",
        "props": [
            {
                "p": "payload"
            }
        ],
        "repeat": "",
        "crontab": "00 20 * * *",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "true",
        "payloadType": "bool",
        "x": 120,
        "y": 120,
        "wires": [
            [
                "ec1819db.fb8c38"
            ]
        ]
    },
    {
        "id": "7a7629fd.6ffa78",
        "type": "api-call-service",
        "z": "8ffd3e02.3f032",
        "name": "Send notification",
        "server": "3bebce79.1e0962",
        "version": 1,
        "debugenabled": false,
        "service_domain": "notify",
        "service": "mobile_app_myphone",
        "entityId": "",
        "data": "{\"message\":\"En eller flere enheder har lavt batteri: \\n\\n {{payload}} \\n\\nDu bør oplade eller skifte batteriet.\"}",
        "dataType": "json",
        "mergecontext": "",
        "output_location": "",
        "output_location_type": "none",
        "mustacheAltTags": false,
        "x": 1090,
        "y": 120,
        "wires": [
            []
        ]
    },
    {
        "id": "6bf2cee8.2c147",
        "type": "comment",
        "z": "8ffd3e02.3f032",
        "name": "Send notification at 20.00 if any device has low battey",
        "info": "",
        "x": 220,
        "y": 60,
        "wires": []
    },
    {
        "id": "3bebce79.1e0962",
        "type": "server",
        "name": "Home Assistant",
        "addon": true
    }
]