You may use a change or a switch node which has regex as a feature. Otherwise you may use a function node.
var data = msg.payload
var pattern = /IP xOffered: [0-9.]+/;
var res = data.match(pattern);
if (!Error) {
msg.payload = false
} else { msg.payload = true}
//msg.payload = res;
return msg;Se the flow for the examples in the picture above:
[
{
"id": "91c977ef317079ac",
"type": "inject",
"z": "4699164e9c288158",
"name": "",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"payload": "68 01 f0 16 f0 ff ff ff 73 : crc=73 YES 68 01 f0 16 f0 ff ff ff 73 t=22500",
"payloadType": "str",
"x": 90,
"y": 80,
"wires": [
[
"f8722f8f45106e2a",
"159bc4a68382cf9c"
]
]
},
{
"id": "f8722f8f45106e2a",
"type": "change",
"z": "4699164e9c288158",
"name": "",
"rules": [
{
"t": "change",
"p": "payload",
"pt": "msg",
"from": "^(.|\\n)*([0-9]{5})$",
"fromt": "re",
"to": "$2",
"tot": "str"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 340,
"y": 120,
"wires": [
[
"159bc4a68382cf9c"
]
]
},
{
"id": "159bc4a68382cf9c",
"type": "debug",
"z": "4699164e9c288158",
"name": "debug 414",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 630,
"y": 80,
"wires": []
},
{
"id": "fcea78c67104b845",
"type": "inject",
"z": "4699164e9c288158",
"name": "",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"payload": "abcd",
"payloadType": "str",
"x": 70,
"y": 180,
"wires": [
[
"7ee2650d2d3d80dd",
"f145cbb92f910ec4"
]
]
},
{
"id": "f145cbb92f910ec4",
"type": "change",
"z": "4699164e9c288158",
"name": "",
"rules": [
{
"t": "change",
"p": "payload",
"pt": "msg",
"from": "^(..)(..)$",
"fromt": "re",
"to": "$2",
"tot": "str"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 360,
"y": 220,
"wires": [
[
"7ee2650d2d3d80dd"
]
]
},
{
"id": "7ee2650d2d3d80dd",
"type": "debug",
"z": "4699164e9c288158",
"name": "debug 415",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 590,
"y": 180,
"wires": []
},
{
"id": "0e49eaefd1c78879",
"type": "inject",
"z": "4699164e9c288158",
"name": "",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"payload": " Response 1 of 1: | Interface: eth4 | IP Offered: 192.168.68.103 | DHCP Message Type: DHCPOFFER | Server Identifier: 192.168.68.1 | NTP Servers: 79.160.225.150 | IP Address Lease Time: 2h00m00s | Subnet Mask: 255.255.255.0",
"payloadType": "str",
"x": 70,
"y": 300,
"wires": [
[
"c71bfc09f557ee6e",
"eee8009c07d816e8"
]
]
},
{
"id": "c71bfc09f557ee6e",
"type": "change",
"z": "4699164e9c288158",
"name": "",
"rules": [
{
"t": "change",
"p": "payload",
"pt": "msg",
"from": "IP Offered: [0-9.]+",
"fromt": "re",
"to": "\"funnet\"",
"tot": "str"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 320,
"y": 300,
"wires": [
[
"03a68c0ed23bbed6"
]
]
},
{
"id": "03a68c0ed23bbed6",
"type": "debug",
"z": "4699164e9c288158",
"name": "debug 416",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "false",
"statusVal": "",
"statusType": "auto",
"x": 610,
"y": 300,
"wires": []
},
{
"id": "eee8009c07d816e8",
"type": "function",
"z": "4699164e9c288158",
"name": "regex-pattern",
"func": "var data = msg.payload\nvar pattern = /IP Offered: [0-9.]+/;\nvar res = data.match(pattern);\n\nif (!Error) {\n msg.payload = false \n} else { msg.payload = true}\n//msg.payload = res;\nreturn msg;",
"outputs": 1,
"timeout": 0,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 310,
"y": 360,
"wires": [
[
"03a68c0ed23bbed6"
]
]
},
{
"id": "768248c90e904c99",
"type": "comment",
"z": "4699164e9c288158",
"name": "https://www.youtube.com/watch?v=ZYGiZ5q7wbI",
"info": "",
"x": 600,
"y": 380,
"wires": []
},
{
"id": "d1878afb6763c81d",
"type": "comment",
"z": "4699164e9c288158",
"name": "68 01 f0 16 f0 ff ff ff 73 : crc=73 YES 68 01 f0 16 f0 ff ff ff 73 t=22500",
"info": "",
"x": 260,
"y": 40,
"wires": []
},
{
"id": "44a3cff3275f3259",
"type": "switch",
"z": "4699164e9c288158",
"name": "",
"property": "payload.comments",
"propertyType": "msg",
"rules": [
{
"t": "regex",
"v": "qrt",
"vt": "str",
"case": true
},
{
"t": "else"
}
],
"checkall": "true",
"repair": false,
"outputs": 2,
"x": 290,
"y": 420,
"wires": [
[
"be9a9d7ac76926b8"
],
[
"b5c8b7eb66a966c0",
"39c294828d430723"
]
]
},
{
"id": "be9a9d7ac76926b8",
"type": "debug",
"z": "4699164e9c288158",
"name": "",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "true",
"targetType": "full",
"statusVal": "",
"statusType": "auto",
"x": 570,
"y": 420,
"wires": []
},
{
"id": "5a7f3a6bfc3f47b6",
"type": "inject",
"z": "4699164e9c288158",
"name": "nomatchstring",
"props": [
{
"p": "payload.comments",
"v": "nomatchstring",
"vt": "str"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"x": 90,
"y": 460,
"wires": [
[
"44a3cff3275f3259"
]
]
},
{
"id": "39c294828d430723",
"type": "debug",
"z": "4699164e9c288158",
"name": "",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "true",
"targetType": "full",
"statusVal": "",
"statusType": "auto",
"x": 690,
"y": 480,
"wires": []
},
{
"id": "b5c8b7eb66a966c0",
"type": "change",
"z": "4699164e9c288158",
"name": "set to false",
"rules": [
{
"t": "set",
"p": "payload",
"pt": "msg",
"to": "false",
"tot": "bool"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 470,
"y": 480,
"wires": [
[
"39c294828d430723"
]
]
},
{
"id": "5e6c57500eb4bfe6",
"type": "inject",
"z": "4699164e9c288158",
"name": "qrt",
"props": [
{
"p": "payload.comments",
"v": "qrt",
"vt": "str"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"x": 70,
"y": 400,
"wires": [
[
"44a3cff3275f3259"
]
]
},
{
"id": "d25af463a7c58e7a",
"type": "inject",
"z": "4699164e9c288158",
"name": "tt qrt",
"props": [
{
"p": "payload.comments",
"v": "tt qrt",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"x": 70,
"y": 520,
"wires": [
[
"c7ff0a7d.2aa708",
"55c36b04.3065f4"
]
]
},
{
"id": "c7ff0a7d.2aa708",
"type": "function",
"z": "4699164e9c288158",
"name": "",
"func": "if ( !msg.payload.comments.toLowerCase().includes(\"qrt\")){\n msg.payload=false}\nreturn msg;",
"outputs": 1,
"timeout": "",
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
"x": 260,
"y": 520,
"wires": [
[
"f46e3f30e8f2459c"
]
]
},
{
"id": "55c36b04.3065f4",
"type": "switch",
"z": "4699164e9c288158",
"name": "",
"property": "$contains( $lowercase($$.payload.comments), \"qrt\")",
"propertyType": "jsonata",
"rules": [
{
"t": "true"
},
{
"t": "false"
}
],
"checkall": "true",
"repair": false,
"outputs": 2,
"x": 330,
"y": 600,
"wires": [
[
"f46e3f30e8f2459c"
],
[
"356a56342be7f2c4"
]
]
},
{
"id": "a0200cdbd74d6e7f",
"type": "inject",
"z": "4699164e9c288158",
"name": "nomatchstring",
"props": [
{
"p": "payload.comments",
"v": "nomatchstring",
"vt": "str"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"x": 90,
"y": 600,
"wires": [
[
"c7ff0a7d.2aa708",
"55c36b04.3065f4"
]
]
},
{
"id": "f46e3f30e8f2459c",
"type": "debug",
"z": "4699164e9c288158",
"name": "Output",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "true",
"targetType": "full",
"statusVal": "",
"statusType": "auto",
"x": 510,
"y": 540,
"wires": []
},
{
"id": "356a56342be7f2c4",
"type": "debug",
"z": "4699164e9c288158",
"name": "false",
"active": true,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "payload",
"targetType": "msg",
"statusVal": "",
"statusType": "auto",
"x": 570,
"y": 620,
"wires": []
}
]
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