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node-red server reconfigured (new broker & seqNo in payload)

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This commit is contained in:
Marius Gripp 2019-08-13 13:16:28 +02:00
parent a1221ebad0
commit ce7d3ab292
1 changed files with 301 additions and 278 deletions
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577
src/Timeserver/Nodered-Timeserver.json
View File

@ -1,198 +1,253 @@
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{
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{ {
"t": "set", "t":"set",
"p": "payload.confirmed", "p":"payload.confirmed",
"pt": "msg", "pt":"msg",
"to": "false", "to":"false",
"tot": "bool" "tot":"bool"
}, },
{ {
"t": "set", "t":"set",
"p": "payload.schedule", "p":"payload.schedule",
"pt": "msg", "pt":"msg",
"to": "replace", "to":"replace",
"tot": "str" "tot":"str"
}, },
{ {
"t": "move", "t":"move",
"p": "payload", "p":"payload",
"pt": "msg", "pt":"msg",
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"tot": "msg" "tot":"msg"
}, },
{ {
"t": "move", "t":"move",
"p": "port", "p":"port",
"pt": "msg", "pt":"msg",
"to": "payload.port", "to":"payload.port",
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} }
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"type": "mqtt in", "type":"mqtt in",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"name": "listen", "name":"listen",
"topic": "+/devices/+/up", "topic":"+/devices/+/up",
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"z": "449c1517.e25f4c", "z":"656d6468.69133c",
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"topic": "", "topic":"",
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"type": "switch", "type":"switch",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"name": "Timeport", "name":"Timeport",
"property": "payload.port", "property":"payload.port",
"propertyType": "msg", "propertyType":"msg",
"rules": [ "rules":[
{ {
"t": "eq", "t":"eq",
"v": "9", "v":"9",
"vt": "num" "vt":"num"
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], ],
"checkall": "true", "checkall":"true",
"repair": false, "repair":false,
"outputs": 1, "outputs":1,
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"type": "json", "type":"json",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"name": "Convert", "name":"Convert",
"property": "payload", "property":"payload",
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"type": "base64", "type":"base64",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"name": "Decode", "name":"Decode",
"action": "", "action":"",
"property": "payload.payload_raw", "property":"payload.payload_raw",
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"name": "Encode", "name":"Encode",
"action": "", "action":"",
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{ {
"id": "6190967b.01f758", "id":"6190967b.01f758",
"type": "comment", "type":"comment",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"name": "LoRaWAN Timeserver v1.1", "name":"LoRaWAN Timeserver v1.1",
"info": "PLEASE NOTE: There is a patent filed for the time sync algorithm used in the\ncode of this file. The shown implementation example is covered by the\nrepository's licencse, but you may not be eligible to deploy the applied\nalgorithm in applications without granted license by the patent holder.", "info":"PLEASE NOTE: There is a patent filed for the time sync algorithm used in the\ncode of this file. The shown implementation example is covered by the\nrepository's licencse, but you may not be eligible to deploy the applied\nalgorithm in applications without granted license by the patent holder.",
"x": 170, "x":170,
"y": 40, "y":40,
"wires": [] "wires":[
]
}, },
{ {
"id": "831ab883.d6a238", "id":"831ab883.d6a238",
"type": "function", "type":"function",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"name": "Timeserver Logic", "name":"Timeserver Logic",
"func": "/* LoRaWAN Timeserver\n\nconstruct 5 byte timesync_answer from gateway timestamp and node's time_sync_req\n\nbyte meaning\n1..4 current second (from epoch time 1970)\n5 1/250ths fractions of current second\n\nFPort = sequence number (taken from node's time_sync_req)\n\n*/\n\nfunction timecompare(a, b) {\n \n const timeA = a.time;\n const timeB = b.time;\n\n let comparison = 0;\n if (timeA > timeB) {\n comparison = 1;\n } else if (timeA < timeB) {\n comparison = -1;\n }\n return comparison;\n}\n\nlet confidence = 2000; // max millisecond diff gateway time to server time\n\n// guess if we have received a valid time_sync_req command\nif (msg.payload.payload_raw.length != 1)\n return;\n\nvar deviceMsg = { payload: msg.payload.dev_id };\nvar seqNo = msg.payload.payload_raw[0];\nvar seqNoMsg = { payload: seqNo };\nvar gateway_list = msg.payload.metadata.gateways;\n\n// filter all gateway timestamps that have milliseconds part (which we assume have a \".\")\nvar gateways = gateway_list.filter(function (element) {\n return (element.time.includes(\".\"));\n});\n\nvar gateway_time = gateways.map(gw => {\n return {\n time: new Date(gw.time),\n eui: gw.gtw_id,\n }\n });\nvar server_time = new Date(msg.payload.metadata.time);\n\n// validate all gateway timestamps against lorawan server_time (which is assumed to be recent)\nvar gw_timestamps = gateway_time.filter(function (element) {\n return ((element.time > (server_time - confidence) && element.time <= server_time));\n});\n\n// if no timestamp left, we have no valid one and exit\nif (gw_timestamps.length === 0) {\n var notavailMsg = { payload: \"n/a\" };\n var notimeMsg = { payload: 0xff }; \n var buf2 = Buffer.alloc(1);\n msg.payload = new Buffer(buf2.fill(0xff));\n return [notavailMsg, notavailMsg, deviceMsg, seqNoMsg, msg];}\n\n// sort time array in ascending order to find most recent timestamp for time answer\ngw_timestamps.sort(timecompare);\n\nvar timestamp = gw_timestamps[0].time;\nvar eui = gw_timestamps[0].eui;\nvar offset = server_time - timestamp;\n\nvar seconds = Math.floor(timestamp/1000);\nvar fractions = (timestamp % 1000) / 4;\n\nlet buf = new ArrayBuffer(5);\nnew DataView(buf).setUint32(0, seconds);\nnew DataView(buf).setUint8(4, fractions);\n\nmsg.payload = new Buffer(new Uint8Array(buf));\nmsg.port = seqNo;\nvar euiMsg = { payload: eui };\nvar offsetMsg = { payload: offset };\n\nreturn [euiMsg, offsetMsg, deviceMsg, seqNoMsg, msg];", "func":"/* LoRaWAN Timeserver\n\nconstruct 5 byte timesync_answer from gateway timestamp and node's time_sync_req\n\nbyte meaning\n1..4 current second (from epoch time 1970)\n5 1/250ths fractions of current second\n\nFPort = sequence number (taken from node's time_sync_req)\n\n*/\n\nfunction timecompare(a, b) {\n \n const timeA = a.time;\n const timeB = b.time;\n\n let comparison = 0;\n if (timeA > timeB) {\n comparison = 1;\n } else if (timeA < timeB) {\n comparison = -1;\n }\n return comparison;\n}\n\nlet confidence = 2000; // max millisecond diff gateway time to server time\n\n// guess if we have received a valid time_sync_req command\nif (msg.payload.payload_raw.length != 1)\n return;\n\nvar deviceMsg = { payload: msg.payload.dev_id };\nvar seqNo = msg.payload.payload_raw[0];\nvar seqNoMsg = { payload: seqNo };\nvar gateway_list = msg.payload.metadata.gateways;\n\n// filter all gateway timestamps that have milliseconds part (which we assume have a \".\")\nvar gateways = gateway_list.filter(function (element) {\n return (element.time.includes(\".\"));\n});\n\nvar gateway_time = gateways.map(gw => {\n return {\n time: new Date(gw.time),\n eui: gw.gtw_id,\n }\n });\nvar server_time = new Date(msg.payload.metadata.time);\n\n// validate all gateway timestamps against lorawan server_time (which is assumed to be recent)\nvar gw_timestamps = gateway_time.filter(function (element) {\n return ((element.time > (server_time - confidence) && element.time <= server_time));\n});\n\n// if no timestamp left, we have no valid one and exit\nif (gw_timestamps.length === 0) {\n var notavailMsg = { payload: \"n/a\" };\n var notimeMsg = { payload: 0xff }; \n var buf2 = Buffer.alloc(1);\n msg.payload = new Buffer(buf2.fill(0xff));\n return [notavailMsg, notavailMsg, deviceMsg, seqNoMsg, msg];}\n\n// sort time array in ascending order to find most recent timestamp for time answer\ngw_timestamps.sort(timecompare);\n\nvar timestamp = gw_timestamps[0].time;\nvar eui = gw_timestamps[0].eui;\nvar offset = server_time - timestamp;\n\nvar seconds = Math.floor(timestamp/1000);\nvar fractions = (timestamp % 1000) / 4;\n\nlet buf = new ArrayBuffer(6);\nnew DataView(buf).setUint8(0, seqNo);\nnew DataView(buf).setUint32(1, seconds);\nnew DataView(buf).setUint8(5, fractions);\n\nmsg.payload = new Buffer(new Uint8Array(buf));\nmsg.port = 9;\nvar euiMsg = { payload: eui };\nvar offsetMsg = { payload: offset };\n\nreturn [euiMsg, offsetMsg, deviceMsg, seqNoMsg, msg];",
"outputs": 5, "outputs":5,
"noerr": 0, "noerr":0,
"x": 350, "x":350,
"y": 320, "y":320,
"wires": [ "wires":[
[ [
"37722d4b.08e3c2", "37722d4b.08e3c2",
"a8a04c7a.c5fbd", "a8a04c7a.c5fbd",
@ -211,7 +266,7 @@
"49e3c067.e782e" "49e3c067.e782e"
] ]
], ],
"outputLabels": [ "outputLabels":[
"gw_eui", "gw_eui",
"offset_ms", "offset_ms",
"device", "device",
@ -220,168 +275,136 @@
] ]
}, },
{ {
"id": "37722d4b.08e3c2", "id":"37722d4b.08e3c2",
"type": "debug", "type":"debug",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"name": "Timeserver Gw", "name":"Timeserver Gw",
"active": true, "active":true,
"tosidebar": false, "tosidebar":false,
"console": false, "console":false,
"tostatus": true, "tostatus":true,
"complete": "payload", "complete":"payload",
"x": 700, "x":700,
"y": 240, "y":240,
"wires": [], "wires":[
"icon": "node-red/bridge.png"
],
"icon":"node-red/bridge.png"
}, },
{ {
"id": "8712a5ac.ed18e8", "id":"8712a5ac.ed18e8",
"type": "ui_text", "type":"ui_text",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"group": "edb7cc8d.a3817", "group":"edb7cc8d.a3817",
"order": 3, "order":3,
"width": 0, "width":0,
"height": 0, "height":0,
"name": "Recent time", "name":"Recent time",
"label": "Last answer at:", "label":"Last answer at:",
"format": "{{msg.payload}}", "format":"{{msg.payload}}",
"layout": "col-center", "layout":"col-center",
"x": 810, "x":810,
"y": 300, "y":300,
"wires": [] "wires":[
]
}, },
{ {
"id": "46ce842a.614d5c", "id":"46ce842a.614d5c",
"type": "ui_gauge", "type":"ui_gauge",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"name": "Timeserver offset", "name":"Timeserver offset",
"group": "edb7cc8d.a3817", "group":"edb7cc8d.a3817",
"order": 2, "order":2,
"width": 0, "width":0,
"height": 0, "height":0,
"gtype": "gage", "gtype":"gage",
"title": "Offset gateway to server", "title":"Offset gateway to server",
"label": "milliseconds", "label":"milliseconds",
"format": "{{value}}", "format":"{{value}}",
"min": 0, "min":0,
"max": "2000", "max":"2000",
"colors": [ "colors":[
"#00b500", "#00b500",
"#e6e600", "#e6e600",
"#ca3838" "#ca3838"
], ],
"seg1": "", "seg1":"",
"seg2": "", "seg2":"",
"x": 710, "x":710,
"y": 380, "y":380,
"wires": [] "wires":[
]
}, },
{ {
"id": "a8a04c7a.c5fbd", "id":"a8a04c7a.c5fbd",
"type": "ui_text", "type":"ui_text",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"group": "edb7cc8d.a3817", "group":"edb7cc8d.a3817",
"order": 1, "order":1,
"width": 0, "width":0,
"height": 0, "height":0,
"name": "Recent server", "name":"Recent server",
"label": "Gateway", "label":"Gateway",
"format": "{{msg.payload}}", "format":"{{msg.payload}}",
"layout": "col-center", "layout":"col-center",
"x": 700, "x":700,
"y": 340, "y":340,
"wires": [] "wires":[
]
}, },
{ {
"id": "a15454a9.fa0948", "id":"a15454a9.fa0948",
"type": "function", "type":"function",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"name": "Time", "name":"Time",
"func": "msg.payload = new Date().toLocaleString('en-GB', {timeZone: 'Europe/Berlin'});\nreturn msg;", "func":"msg.payload = new Date().toLocaleString('en-GB', {timeZone: 'Europe/Berlin'});\nreturn msg;",
"outputs": 1, "outputs":1,
"noerr": 0, "noerr":0,
"x": 670, "x":670,
"y": 300, "y":300,
"wires": [ "wires":[
[ [
"8712a5ac.ed18e8" "8712a5ac.ed18e8"
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{ {
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"type": "ui_text", "type":"ui_text",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"group": "edb7cc8d.a3817", "group":"edb7cc8d.a3817",
"order": 1, "order":1,
"width": 0, "width":0,
"height": 0, "height":0,
"name": "Recent Device", "name":"Recent Device",
"label": "Device", "label":"Device",
"format": "{{msg.payload}}", "format":"{{msg.payload}}",
"layout": "col-center", "layout":"col-center",
"x": 700, "x":700,
"y": 420, "y":420,
"wires": [] "wires":[
]
}, },
{ {
"id": "1cb58e7f.221362", "id":"1cb58e7f.221362",
"type": "ui_text", "type":"ui_text",
"z": "449c1517.e25f4c", "z":"656d6468.69133c",
"group": "edb7cc8d.a3817", "group":"edb7cc8d.a3817",
"order": 1, "order":1,
"width": 0, "width":0,
"height": 0, "height":0,
"name": "Sequence No", "name":"Sequence No",
"label": "Sequence", "label":"Sequence",
"format": "{{msg.payload}}", "format":"{{msg.payload}}",
"layout": "col-center", "layout":"col-center",
"x": 700, "x":700,
"y": 460, "y":460,
"wires": [] "wires":[
},
{ ]
"id": "2a15ab6f.ab2244",
"type": "mqtt-broker",
"z": "",
"name": "eu.thethings.network:1883",
"broker": "mqtt://paxcounter-timediff:ttn-account-v2.Fyf_ZgT4lBM2A3Gj-4SpNPp0-_tPkqtPRMJ_a-w1aT4@eu.thethings.network/",
"port": "1883",
"tls": "",
"clientid": "",
"usetls": false,
"compatmode": true,
"keepalive": "60",
"cleansession": true,
"birthTopic": "",
"birthQos": "0",
"birthPayload": "",
"closeTopic": "",
"closeQos": "0",
"closePayload": "",
"willTopic": "",
"willQos": "0",
"willPayload": ""
},
{
"id": "edb7cc8d.a3817",
"type": "ui_group",
"z": "",
"name": "Timeserver",
"tab": "d525a5d.0832858",
"order": 4,
"disp": true,
"width": "6",
"collapse": false
},
{
"id": "d525a5d.0832858",
"type": "ui_tab",
"z": "",
"name": "Timeserver",
"icon": "sync",
"order": 3,
"disabled": false,
"hidden": false
} }
] ]