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Nodred Timeserver graph display

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This commit is contained in:
Verkehrsrot 2019-03-17 22:00:14 +01:00
parent 2d93f323b4
commit cd67cb2335
1 changed files with 74 additions and 7 deletions
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81
src/TTN/Nodered-Timeserver.json
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@ -49,7 +49,7 @@
"to": "",
"reg": false,
"x": 200,
"y": 400,
"y": 420,
"wires": [
[
"84f1cda2.069e7"
@ -82,7 +82,7 @@
"retain": "",
"broker": "2a15ab6f.ab2244",
"x": 690,
"y": 400,
"y": 420,
"wires": []
},
{
@ -135,7 +135,7 @@
"action": "",
"pretty": false,
"x": 540,
"y": 400,
"y": 420,
"wires": [
[
"72d5e7ee.d1eba8"
@ -165,7 +165,7 @@
"action": "",
"property": "payload.payload_raw",
"x": 380,
"y": 400,
"y": 420,
"wires": [
[
"dac8aafa.389298"
@ -212,8 +212,8 @@
"type": "function",
"z": "449c1517.e25f4c",
"name": "Generate Time Answer",
"func": "/* LoRaWAN Timeserver\n\nconstruct 6 byte timesync_answer from gateway timestamp and node's time_sync_req\n\nbyte meaning\n0 sequence number (taken from node's time_sync_req)\n1..4 current second (from epoch time 1970)\n5 1/250ths fractions of current second\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\nvar gateways = msg.payload.metadata.gateways;\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) return null;\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;\n\nvar seconds = Math.floor(timestamp/1000);\nvar fractions = (timestamp % 1000) / 4;\nvar seqno = msg.payload.payload_raw[0];\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));\nvar infoMsg = { payload: eui };\n\nreturn [infoMsg, msg];",
"outputs": 2,
"func": "/* LoRaWAN Timeserver\n\nconstruct 6 byte timesync_answer from gateway timestamp and node's time_sync_req\n\nbyte meaning\n0 sequence number (taken from node's time_sync_req)\n1..4 current second (from epoch time 1970)\n5 1/250ths fractions of current second\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\nvar gateways = msg.payload.metadata.gateways;\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) return null;\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;\nvar seqno = msg.payload.payload_raw[0];\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));\nvar infoMsg = { payload: eui };\nvar offsetMsg = { payload: offset };\n\nreturn [infoMsg, msg, offsetMsg];",
"outputs": 3,
"noerr": 0,
"x": 380,
"y": 300,
@ -224,11 +224,15 @@
],
[
"49e3c067.e782e"
],
[
"46ce842a.614d5c"
]
],
"outputLabels": [
"gw_eui",
"time_sync_ans"
"time_sync_ans",
"offset_ms"
]
},
{
@ -246,6 +250,48 @@
"wires": [],
"icon": "node-red/bridge.png"
},
{
"id": "8712a5ac.ed18e8",
"type": "ui_text",
"z": "449c1517.e25f4c",
"group": "edb7cc8d.a3817",
"order": 0,
"width": 0,
"height": 0,
"name": "Timeserver",
"label": "Recent timeserver was:",
"format": "{{msg.payload}}",
"layout": "col-center",
"x": 670,
"y": 320,
"wires": []
},
{
"id": "46ce842a.614d5c",
"type": "ui_gauge",
"z": "449c1517.e25f4c",
"name": "offset",
"group": "edb7cc8d.a3817",
"order": 1,
"width": 0,
"height": 0,
"gtype": "gage",
"title": "Offset [ms]",
"label": "units",
"format": "{{value}}",
"min": 0,
"max": "2000",
"colors": [
"#00b500",
"#e6e600",
"#ca3838"
],
"seg1": "",
"seg2": "",
"x": 690,
"y": 360,
"wires": []
},
{
"id": "2a15ab6f.ab2244",
"type": "mqtt-broker",
@ -268,5 +314,26 @@
"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
}
]