[
    {
        "id": "e4331dc79c943b4a",
        "type": "tab",
        "label": "Flow 1",
        "disabled": false,
        "info": "",
        "env": []
    },
    {
        "id": "308e29d8bbf046b2",
        "type": "ui-in",
        "z": "e4331dc79c943b4a",
        "client": "fa403183de7ff104",
        "name": "",
        "payloadOutput": "string",
        "x": 110,
        "y": 300,
        "wires": [
            [
                "998285703c4a6fc5"
            ]
        ]
    },
    {
        "id": "998285703c4a6fc5",
        "type": "function",
        "z": "e4331dc79c943b4a",
        "name": "De-duplicate",
        "func": "// Node-RED Function node code\n// Dedupes APRS packets from node-red-contrib-ax25 ui-in node\n// Ignores digipeater path (via) and timestamp — same source+destination+payload = duplicate\n\nconst WINDOW_MS = 5000; // ignore duplicates seen within 5 seconds\n\nif (!msg.source) {\n    // Not a recognizable APRS packet — pass through unchanged\n    return msg;\n}\n\n// Identity of the packet: who sent it, to what destination, with what content\n// (deliberately excludes \"via\"/digipeater path and timestamp, since those\n// differ between repeated copies of the same packet)\nconst key = msg.source + '|' + msg.destination + '|' + msg.payload;\n\nconst now = Date.now();\nlet cache = context.get('dedupeCache') || {};\n\n// Purge stale entries\nfor (const k in cache) {\n    if (now - cache[k] > WINDOW_MS) {\n        delete cache[k];\n    }\n}\n\nif (cache[key] !== undefined && (now - cache[key]) < WINDOW_MS) {\n    // Duplicate within window — drop it\n    return null;\n}\n\ncache[key] = now;\ncontext.set('dedupeCache', cache);\n\nreturn msg;",
        "outputs": 1,
        "timeout": 0,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 290,
        "y": 300,
        "wires": [
            [
                "73a2ff6ca5655cdd"
            ]
        ]
    },
    {
        "id": "419465eb08c13f67",
        "type": "function",
        "z": "e4331dc79c943b4a",
        "name": "Calc",
        "func": "// Node-RED Function node code\n// Evaluates msg.payload as an arithmetic expression and replaces it with the result\n\nconst expr = msg.payload;\n\nif (typeof expr !== 'string') {\n    node.warn('payload is not a string, cannot evaluate: ' + JSON.stringify(expr));\n    return null;\n}\n\n// Only allow digits, whitespace, and basic arithmetic operators/parentheses\n// This prevents arbitrary code execution via Function constructor / eval\nif (!/^[0-9+\\-*/().\\s]+$/.test(expr)) {\n    node.warn('payload contains disallowed characters: ' + expr);\n    return null;\n}\n\nlet result;\ntry {\n    // Safer than eval() since scope is restricted to just this expression,\n    // and input is already validated against the whitelist regex above\n    result = Function('\"use strict\"; return (' + expr + ')')();\n} catch (err) {\n    node.warn('failed to evaluate expression \"' + expr + '\": ' + err.message);\n    return null;\n}\n\nif (typeof result !== 'number' || !isFinite(result)) {\n    node.warn('expression did not evaluate to a finite number: ' + expr);\n    return null;\n}\n\nreturn {\n    source: msg.destination,\n    destination: msg.source,\n    payload: String(result),\n    via: 'wide1-1,wide2-1',\n};\n",
        "outputs": 1,
        "timeout": 0,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 270,
        "y": 420,
        "wires": [
            [
                "bef74fb3cb84794a"
            ]
        ]
    },
    {
        "id": "73a2ff6ca5655cdd",
        "type": "function",
        "z": "e4331dc79c943b4a",
        "name": "Filter",
        "func": "\nif (msg.destination.toLowerCase() !== 'calc') {\n    return null;\n}\n\nreturn msg;",
        "outputs": 1,
        "timeout": 0,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 270,
        "y": 360,
        "wires": [
            [
                "419465eb08c13f67"
            ]
        ]
    },
    {
        "id": "bef74fb3cb84794a",
        "type": "ui-out",
        "z": "e4331dc79c943b4a",
        "client": "fa403183de7ff104",
        "name": "",
        "source": "",
        "destination": "",
        "via": "",
        "payload": "",
        "x": 430,
        "y": 420,
        "wires": [
            []
        ]
    },
    {
        "id": "fa403183de7ff104",
        "type": "agwpe-client",
        "name": "",
        "host": "127.0.0.1",
        "port": 8000,
        "callsigns": "",
        "username": "",
        "password": "",
        "monitor": false,
        "raw": true,
        "reconnect": true,
        "reconnectDelay": 5000
    },
    {
        "id": "6eaa8ab7bc3bdcb6",
        "type": "global-config",
        "env": [],
        "modules": {
            "node-red-contrib-ax25": "1.1.0"
        }
    }
]