Nodered Timeserver improved
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149c7f6732
commit
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@ -138,7 +138,8 @@
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"y": 360,
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"y": 360,
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"wires": [
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"wires": [
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[
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[
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"72d5e7ee.d1eba8"
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"72d5e7ee.d1eba8",
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"f8749724.1ff9f8"
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@ -203,19 +204,19 @@
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"y": 200,
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"y": 200,
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"wires": [
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"wires": [
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[
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[
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"595229b0.5df3d8"
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"831ab883.d6a238"
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{
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{
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"id": "595229b0.5df3d8",
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"id": "831ab883.d6a238",
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"type": "function",
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"type": "function",
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"z": "449c1517.e25f4c",
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"z": "449c1517.e25f4c",
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"name": "Time_Sync_Ans",
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"name": "Generate Time Answer",
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"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\n let timestamp = (+new Date(msg.payload.metadata.gateways[0].time));\n let timestamp_server = (+new Date(msg.payload.metadata.time));\n \n if ((timestamp < timestamp_server) && (timestamp > 0)) {\n \n var seconds = Math.floor(timestamp/1000);\n var fractions = (timestamp % 1000) / 4;\n var seqno = msg.payload.payload_raw[0];\n\n let buf = new ArrayBuffer(6);\n new DataView(buf).setUint8(0, seqno);\n new DataView(buf).setUint32(1, seconds);\n new DataView(buf).setUint8(5, fractions);\n\n msg.payload = new Buffer(new Uint8Array(buf));\n \n return msg;\n}\n\nelse\n\nreturn null;",
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"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\nvar gateways = msg.payload.metadata.gateways;\nvar gateway_time = gateways.map(gw => new Date(gw.time));\nvar server_time = new Date(msg.payload.metadata.time);\n\ngateway_time.sort();\n\nvar gw_timestamps = gateway_time.filter(function (element) {\n return element > 0;\n});\n\nvar timestamp = gw_timestamps[0];\n\nif (timestamp < server_time) {\n\n var seconds = Math.floor(timestamp/1000);\n var fractions = (timestamp % 1000) / 4;\n var seqno = msg.payload.payload_raw[0];\n\n let buf = new ArrayBuffer(6);\n new DataView(buf).setUint8(0, seqno);\n new DataView(buf).setUint32(1, seconds);\n new DataView(buf).setUint8(5, fractions);\n\n msg.payload = new Buffer(new Uint8Array(buf));\n \n return msg;\n\n}\n\nelse\n\nreturn null;",
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"outputs": 1,
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"outputs": 1,
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"noerr": 0,
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"noerr": 0,
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"x": 380,
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"x": 420,
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"y": 280,
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"y": 280,
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"wires": [
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[
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@ -223,6 +224,20 @@
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]
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},
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},
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{
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"id": "f8749724.1ff9f8",
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"type": "debug",
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"z": "449c1517.e25f4c",
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"name": "time_sync_ans",
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"active": false,
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"tosidebar": true,
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"console": false,
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"tostatus": true,
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"complete": "payload",
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"x": 720,
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"y": 280,
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"wires": []
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},
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{
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{
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"id": "2a15ab6f.ab2244",
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"id": "2a15ab6f.ab2244",
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"type": "mqtt-broker",
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"type": "mqtt-broker",
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